Compiled by Colby B. Rucker Preface: Use of Copyrighted Material
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- 45. Moraceae (Mulberry Family)
- 46. Cannabinaceae (Hemp Family)
- 47. Urticaceae (Nettle Family)
- 48. Santalaceae (Sandalwood Family)
- 49. Loranthaceae (Mistletoe Family)
- 50. Aristolochiaceae (Birthwort Family)
- 51. Polygonaceae (Buckwheat Family)
44. Ulmaceae (Elm Family) 498. Celtis occidentalis L. 1753. Shr.427, B&B.90 (Common Hackberry) Native deciduous tree with gray, unfissured, warty bark.
499. Ulmus americana L. 1753. Shr.427, B&B.88 (American Elm, White Elm) Large native tree .
500. Ulmus pumila L. B&B.88 (Siberian Elm) Tree introduced from Asia. An occasional escape. Records: Ivy Neck (Stieber 1971). Ivy Neck, solitary at edge of steep bank of Rhode River, just north of pier, Higman 1074 (CBC) (Higman 1977). Back Creek watershed (Williams 1989). Herbaria: CBC. US (Stieber 1971). 501. Ulmus rubra Muhl. B&B.87 (Ulmus fulva Michx. 1803) Shr.427 (Ulmus pubescens Walt.) (Slippery Elm) Native tree.
502. Broussonetia papyrifera (L.) Vent. 1799. Shr.427, B&B.93 [Papyrius papyrifera (L.) Kuntze 1891] (Morus papyrifera L. 1753) (Paper Mulberry) Tree introduced from Asia. Sprouts from roots, forms thickets. Habitat: "In cultivated grounds" (Shreve et al 1910). Frequency: "Throughout the state" (Shreve et al 1910). "Mostly in the Coastal Zone" (Brown & Brown 1972). Records: Java Farm, solitary near west fence of old field near CBC pier, Higman 346, 1137 (CBC) (Higman 1977). "Near fence of field at Java Farm" (Stieber 1971). Sightings: Route 648 north of Glen Oban. Truxtun Park (near Hesselius cemetery). Lower end of swale in poplar woods on Kass tract, Bay Ridge 10/6/90. Old Bates H. S. property 1991. Herbaria: CBC. US (Stieber 1971). 503. Maclura pomifera (Raf.) Schneider 1906. B&B.95 (Maclura aurantiaca Nutt. 1818) (Toxylon pomiferum Raf. 1817) Shr.427 (Osage Orange) Tree introduced from Arkansas, Oklahoma, & Texas. Frequency: "Coastal and Midland Zones, apparently not hardy in the Mountain Zone" (Shreve et al 1910). Records: Ivy Neck, infrequent to moderately abundant in hedgerows and along shores of upper Cheston Peninsula, Higman 869, 1010 (CBC) (Higman 1977). Back Creek watershed (Williams 1989). Sightings: Open woods off Cumberstone Road at "Cedar Park". College Creek: bank at end of State "D" parking lot; shore at St. Anne's graveyard. Several trees in boxelder thicket between Rowe Blvd. And Forbes St., Annapolis 2002. Herbaria: CBC. US (Stieber 1971). 504. Morus alba L. 1753. B&B.93 (White Mulberry) Spreading tree with persistent deadwood, introduced from eastern Asia, and thoroughly naturalized. Leaves glossy above; waxy-smooth to the touch. Teeth mostly rounded, tip short-acuminate, petiole yellow-green, veins sparsely pubescent. Habitat: Common along roadsides, hedge-rows, and waste places. Frequency: "Common...mostly on the Coastal Plain and Piedmont" (Brown & Brown 1972). Records: Manresa, small tree at the entrance to woods 6/1/1966, Steiber 177 (LCU) (Stieber 1967). Java Farm & Ivy Neck, infrequent in understory of poorly drained forest, Higman 479 (CBC) (Higman 1977). Back Creek watershed (Williams 1989). Jacobsville Park, Quiet Waters Park, Beachwood Park, Lake Waterford Park (Longbottom 1991). Sightings: Chase Creek watershed (Rucker property). Herbaria: CBC. US & LCU (Stieber 1971). 505. Morus rubra L. 1753. Shr.427, B&B.93 (Red Mulberry) Spreading native tree with persistent deadwood. Leaves scabrous above; scruffy-rough to the touch.
Hybridization threatens the genetic integrity of Morus rubra. This is a severe problem affecting remaining populations in Ontario, Canada. However, the hybrid does appear more resistant to a bacterial disease which has affected native mulberries in Anne Arundel County. Description: Leaves to 8 inches, glabrous, not glossy, silky-smooth to touch. Tips long-acuminate. Teeth broad with sharp point. Petiole dull green. Veins hairy w/lens. Bark and structure like red mulberry. Sightings: Chase Creek watershed: Rucker property, Lot 704, 8/18/1999. The trunk of this tree shows (8/23/1999) numerous cankers which are healing satisfactorily, without secondary enlargement. 46. Cannabinaceae (Hemp Family) 507. Cannabis sativa L. 1753. B&B.390 (Marijuana, Hemp) Tall (3-10 ft.) palmate-leaved annual herb introduced from Asia. Habitat: "Waste rich land" (Jaques 1959). Openings in rich woods and bottoms. Not on poor sands or in dense shade. Frequency: May be encountered where illegally planted. Plantings (no longer extant) seen at Chase Creek, Mill Creek (of Severn), and Sullivans Cove watersheds. Naturalized populations less common. Records: Manresa, along a path through a moist woods 9/9/1966, Steiber 178 (LCU) (Stieber 1967). Sightings: Rays Pond watershed: Harbour Glen property by Rucker & Nancy Kelly ca. 1986. Herbaria: LCU (Stieber 1971). 508. Humulus japonicus Sieb. & Zucc. B&B.388 (Japanese Hops) Annual twining vine introduced from Japan. Leaves deeply 5-9 lobed. Habitat: "Home sites, roadsides and fence rows" (Brown & Brown 1984). Frequency: "Occasional" (Brown & Brown 1984). Records: Old Forge Bridge (Longbottom 1993). 47. Urticaceae (Nettle Family) 509. Boehmeria cylindrica (L.) Sw. 1788. B&B.392 [Boehmeria cylindrica (L.) Willd.] Shr.428 (Urtica cylindrica L. 1753) (False Nettle, Smallspike) Native perennial herb. Ht. to 3 ft. Leaves opposite, serrate. Some pubescence, but no stinging hairs. Habitat: "Moist or shady ground" (Gray 1867). "In moist forests and open situations" (Shreve et al 1910). Edges of ponds. Frequency: "Throughout the state" (Shreve et al 1910). A weed (Jaques 1959). Records: Java Farm, infrequent along old entrance road near shaded culvert over north fork of Muddy Creek, also near culvert of Fox Creek near new entrance gate, Higman 458, 978 (CBC) (Higman 1977). Two county fresh-marsh stations mapped by Sipple 1978. Angels Bog (Whigham 1981, Sipple & Klockner 1984). Lake Waterford Park, Governors Bridge gravel pits (Longbottom 1991). Jug Bay Wetland Sanctuary (Mason et al 1991). Angels Bog 8/7/1992 (Sipple 1993). Sightings: Chase Creek watershed (Ruckers Pond 8/18/1999). Corcoran tract at Sandy Point 6/18/88. Truxtun Park. Herbaria: CBC. US (Stieber 1971). 510. Laportea canadensis (L.) Wedd. B&B.392 [Laportea canadensis (L.) Gaud.] [Urticastrum divaricatum (L.) Kuntze] Shr.428 (Wood Nettle) Perennial herb with stinging hairs. Ht. 2-3 ft. Leaves alternate. Habitat: "Moist rich woods" (Gray 1867). "Flood plains and moist forests" (Shreve et al 1910). "Rich woods and stream banks" (Brown & Brown 1984). Frequency: "Throughout the state, common" (Shreve et al 1910). Records: Jug Bay Wetlands Sanctuary (Mason et al 1991). 511. Pilea pumila (L.) A. Gray 1848. B&B.392 (Urtica pumila L. 1753) [Adicea pumila (L.) Raf. 1843] Shr.428 (Clearweed, Richweed) Native translucent-stemmed, weak-rooted, annual herb. Ht. ca. 12 in. no stinging hairs.
512. Urtica dioica L Shr.428, B&B.390 (Stinging Nettle) Upright opposite-leaved perennial herb naturalized from Europe. Ht. 2-3 ft. Very bristly; covered with stinging hairs. Habitat: "Waste places and roadsides" (Gray 1867). "In waste grounds" (Shreve et al 1910). "Barnyards and along roadsides and stream banks" (Brown & Brown 1984). Frequency: "Throughout the state; common" (Shreve et al 1910). "A weed...widely spread" (Fogg 1956). Records: Picture Spring Branch (Nevamar Pond; Ecological Analysts 1983. Sightings: 190 Old River Road, Pines on Severn, ca. 1961; now destroyed. 48. Santalaceae (Sandalwood Family) 513. Comandra umbellata (L.) Nutt. 1818 Shr.428, B&B.394 (Thesium umbellatum L. 1753) (Bastard Toadflax) Low native erect perennial herb. Ht. 8-10 in.
514. Phoradendron flavescens (Pursh) Nutt. 1856. Shr.428, B&B.95 (Viscum flavescens Pursh 1814) (American Mistletoe) Native parasitic shrub. Habitat: "Parasitic on deciduous trees, preferring oaks and red maple" (Shreve et al 1910; p.428). "Occurs in the 'meadow' districts, and appears to prefer black gum as a host" (M. A. Chrysler, in Shreve et al 1910; p.180). Frequency: "Common in the Coastal Zone, rare in the Midland and Mountain Zones" (Shreve et al 1910). Records: "Southeast of West River" (M. A. Chrysler, in Shreve et al 1910; p.180). Java Farm, solitary in upper branches of large oak tree on Hog Island, collected from fragments on ground, Higman 1362 (CBC) (Higman 1977); (On 6/11/87 Dennis Whigham said the tree was gone; he recalled it as a sour gum.). Sightings: Once abundant in old sour gum woods on Shadyside Road, north of Miller's Airport; woods now cut down. In Prince Georges County, mistletoe occurred on an old sour gum near a springhouse on the John H. Buxton property at Mistletoe Springs, in Prince Georges County, 1 1/4 mile south of Laurel in the mid-1880's; plants should be looked for on the Anne Arundel side of the Patuxent, immediately above Fort Meade. Herbaria: CBC. 50. Aristolochiaceae (Birthwort Family) 515. Asarum canadense L. 1753 Shr.428, B&B.396 (Wild Ginger) Low native perennial herb; leaves cordate; flower on ground, brownish. Habitat: "Hillsides in rich woods" (Gray 1867). "In moist forests" (Shreve et al 1910). "On rich and usually rocky wooded slopes" (Grimm 1968). Brown & Brown (1984) state that it is less common on acid soils. Frequency: "Rare in the Coastal Zone; common in the Midland and Mountain Zones" (Shreve et al 1910). Sightings: "Patuxent River at Governor's Bridge" (personal footnote by Klockner ca. 1979). Near Little Patuxent at Forge Bridge April 1992 (Longbottom pc 4/24/1992). 51. Polygonaceae (Buckwheat Family) 516. Polygonella articulata (L.) Meisn. 1836-43. Shr.430, B&B.401 (Polygonum articulatum L.) (Coast Jointweed) Native erect annual herb. Flowers rose-colored.
517. Polygonum amphibium L. Shr.429, B&B.406 [Polygonum natans (Michx.) D. C. Eaton] [Persicaria amphibia (L.) S. F. Gray] (Water Smartweed, Water Persicaria) Native perennial herb. Racemes ovoid, calyx pink. Habitat: "Shallow waters and muddy shores" (Grimm 1968). Frequency: "Coastal Zone" (Shreve et al 1910). "Coastal; uncommon" (Brown & Brown 1984). Records: Patuxent Community Pond, along the pond edge, with Galium aparine and other Polygonum species 9/23/1966, Stieber 191 (LCU)(Stieber 1967). Herbaria: LCU (As P. natans; Stieber 1971). 518. Polygonum arifolium L. 1753. Shr.429, B&B.413 (Halberd-leaved Tearthumb) Reclining native perennial herb. Halberd-shaped leaves. Sharp stem prickles. Habitat: "In marshes, swamps and open wet situations" (Shreve et al 1910). Wet soils, especially in swamps and tidal marshes" (Brown & Brown 1984). Frequency: "Throughout the state; common" (Shreve et al 1910). Records: Evergreen Road, off Rt. 3, in a creek 7/1/1966, Stieber 184(LCU) (Stieber 1967). Java Farm, solitary between wet Phalaris arundinacea meadow and North Fork of Muddy Creek, in wet forests, Higman 1055 (CBC) (Higman 1977). Nine county fresh-marsh stations mapped by Sipple 1978. Severn Run 9/18/1983 (Sipple 1993). Picture Spring Branch (Nevamar Pond; Ecological Analysts 1983). Sawmill Pond 8/11/1989 (Sipple 1993). Marley Creek Swamp 9/30/1990, Longbottom 1298 (AACC). Lake Waterford Park, Beachwood Park, Governors Bridge gravel pits (Longbottom 1991). Jug Bay Wetlands Sanctuary (Mason et al 1991). Kinder Park pond & meadow 6/10/1992 (Sipple 1993). Sightings: Chase Creek watershed (above Ruckers Pond). Truxtun Park. Sewell Spring Branch (at path crossing). Brewer Pond watershed (upper ravine). Plum Creek marsh. Herbaria: CBC, AACC. US & LCU (Stieber 1971). 519. Polygonum aubertii (L.) Henry B&B: unlisted. (Fleecevine) High-twining woody deciduous vine. Native of western China. Sightings: Planted on iron fence panels of brick wall of State Complex at Bladen Street, Annapolis in 1980's. Numerous small specimens were seen growing in the Rowe Blvd. graveled median in May 1991. A potential nuisance if allowed to escape. Vines removed ca. 2001. 520. Polygonum aviculare L. 1753. Shr.429, B&B.406 (Common Knotweed, Knot-grass) Low, wiry, much-branched, prostrate or spreading native annual herb. Habitat: "In cultivated grounds" (Shreve et al 1910). "A weed...common in paths, roadsides and much tramped areas...forming a tough mat" (Jaques 1959). Frequency: "Throughout the state; common" (Shreve et al 1910). Records: Patuxent R. at Rt. 50, sandy-clay, in spreading mats 8/8/1966, Stieber 185 (LCU) (Stieber 1967). Manresa, on lawn, moist 10/3/1966, Stieber 186 (LCU) (Stieber 1967). Ivy Neck, solitary in tractor trail to abandoned field, Higman 1059 (CBC) (Higman 1977). Herbaria: CBC. US & LCU (Stieber 1971). 521. Polygonum careyi Olney 1847 B&B.408 (Persicaria careyi Greene 1904) (Carey's Knotweed) Tall native annual herb. Ht. 3-5 ft. Calyx pink to purplish.
522. Polygonum cespitosum Blume B&B.410: var. only. Brown & Brown (1984) list only var. longisetum; likely all Maryland specimens are that variety.
Weakly erect, introduced annual herb. Calyx rose-purple. Long-bristly at nodes. Habitat: "Damp roadsides and waste places" (Brown & Brown 1984). Records: Patuxent Community Pond, along pond edge with Galium and P. sagittatum 9/23/1966 Stieber 187 (LCU) (Stieber 1967). Beachwood Park (Longbottom 1991). Sightings: Chase Creek watershed (Rucker property, lot 705 9/26/1992). Herbaria: LCU (Stieber 1967). 523. Polygonum cespitosum Blume var. longisetum (DeBruyn) Stewart B&B.410 Introduced annual herb.
524. Polygonum cristatum Engelm. & Gray B&B.413 [Polygonum scandens var. cristatum (Engelm. & Gray) Gleason] [Polygonum dumetorum forma cristatum (Engelm. & Gray) Robinson] (Crested False Buckwheat, Cornbind) Perennial herbaceous twining vine. Habitat: "Sandy woods and rocky banks" (Britton 1901). "Sandy and rocky, partly shaded areas" (Brown & Brown 1984). Frequency: "Infrequent on the Coastal Plain" (Brown & Brown 1984). Records: Java Farm, solitary by old entrance road at small culvert, just after entrance to forest, Higman 1207 (CBC) (Higman 1977). Herbaria: CBC. 525. Polygonum cuspidatum Sieb. & Zucc. 1846. B&B.406 (Pleuropteris zuccarinii Small 1895) (Japanese Knotweed) Stout, jointed-stemmed, slightly woody perennial herb. Introduced from Japan, and escaped from cultivation. Whitish flowers.
526. Polygonum densiflorum Meisn. B&B.408 (Dense-flowered Knotweed) Decumbent perennial herb. Calyx whitish. Habitat: "Swamps and shallow waters" (Brown & Brown 1984). Frequency: "Coastal Plain; rare" (Brown & Brown 1984). Heritage Rating: 1988: B2 (Highly State Rare). 1991: Endangered. Sightings: Border of ponds at Governors Bridge Road (Longbottom, pc 1991). 527. Polygonum hydropiper L. Shr.430, B&B.408 (Water Smartweed, Water-pepper) Erect annual, introduced from Europe. Ht. 1-2 ft. Calyx greenish. Habitat: "Moist or wet grounds" (Gray 1867). "In moist waste places" (Britton 1901). "Damp soils" (Brown & Brown 1984). Frequency: "Coastal Zone" (Shreve et al 1910). A weed (Fogg 1956, Jaques 1959). "Infrequent, mostly coastal" (Brown & Brown 1984). Records: Picture Spring Branch (Nevamar Pond; Ecological Analysts 1983). 528. Polygonum hydropiperoides Michx. 1803. Shr.429, B&B.410 (Swamp Knotweed, Mild Smartweed, Mild Water-pepper) Native reclining perennial herb. Ht. 1-3 ft. Calyx pink-purplish. Habitat: "Wet places, and in shallow water" (Gray 1867). "In swamps and wet soil" (Britton 1908). "Marshes, swamps and open wet situations" (Shreve et al 1910). Frequency: "Throughout the state; common" (Shreve et al 1910). A weed (Jaques 1959). Records: Near St. James Church, in a field 6/5/1966, Stieber 190 (LCU) (Stieber 1967). Manresa, in a swampy area of the Severn 9/9/1966, Stieber 188 (LCU) (Stieber 1967). Patuxent Community Pond, pond's edge 9/23/1966, Stieber 189 (LCU) (Stieber 1967). Herbaria: LCU, US (Stieber 1971). 529. Polygonum hydropiperoides forma leucochranthum A. H. Moore B&B: unlisted. (Smartweed)
530. Polygonum hydropiperoides Michx. var. setaceum (Baldw.) Gl. (Polygonum setaceum Baldw. 1817) B&B.410 (Bristly Persicaria, Smartweed) Native perennial herb. Habitat: "Swamps and wet soils" (Brown & Brown 1984). Records: "One station near a cornfield at Java Farm" (As P. setaceum; Stieber 1971). Java Farm, solitary at north boundary fence, adjacent Kirkpatrick Howat's corn field, Higman 1243 (CBC) (As P. setaceum; Higman 1977). Herbaria: CBC. US (As P. setaceum; Stieber 1971). 531. Polygonum pensylvanicum L. 1753. Shr.429, B&B.408 (Pennsylvania Knotweed, Pennsylvania Smartweed, Pennsylvania Persicaria, Big-seeded Smartweed, Pinkweed) Native annual branching herb. Calyx pink. Habitat: "Moist soil, in open waste places" (Gray 1867). "Moist cultivated ground" (Shreve et al 1910). "Damp shores, thickets or clearings" (Stieber 1971). Frequency: "Throughout the state; common" (Shreve et al 1910). A weed (Fogg 1956, Jaques 1959). Records: Patuxent R. at Rt. 50, in wet sandy-clay 8/8/1966, Stieber 192 (LCU) (Stieber 1967). Throughout CBC; infrequent to moderately abundant along roads (E. G. Contees Wharf Road); in open fields at Ivy Neck, and at western end of Phalaris arundinacea meadow at Java Farm; Higman 151, 1023 (CBC) (Higman 1977). One county fresh-marsh station (on Magothy) mapped by Sipple 1978. Back Creek watershed (Williams 1989). Beachwood Park, Jacobsville Park (Longbottom 1991). Herbaria: CBC. US & LCU (Stieber 1971). 532. Polygonum perfoliatum L. B&B.410 (Perfoliate Tearthumb) Vigorous prickly reclining or climbing herb introduced from Asia. A noxious weed. Habitat: Moist rich soils; roadsides, floodplains and stream banks. Frequency: Prolific at all stations, and establishing in rich moist soils in many areas. Records: Rts. 3 & 178 7/20/1984, Sawmill Pond 8/11/1989 (Sipple 1993). Sightings: Jabez Branch watershed (above Rt. 32, and below Hog Farm Rd.). Cypress Branch floodplain. Chase Creek watershed (one plant destroyed near Ruckers Pond 1986). Near Stony Run (Seen 1985 by Klockner & Rucker at end of road leading to BWI Helonias bullata station). Severn Run valley below New Cut Road. Ravine off lower Plum/Gumbottom Branch) one plant 10/15/88. Head of Waterford Branch 8/19/1989, Waterford Branch below Rt. 2 8/26/1989 (Sipple 1993). Eagle Hill Road at powerline (Longbottom, pc 1991). Forest Home site at Marley Creek 8/9/1991 (Sipple 1993). Kinder Park [Longbottom 1993 (as P. peltatum)]. Herbaria: CBC (CBC 1993). 533. Polygonum persicaria L. 1753. Shr.430, B&B.410 (Lady's Thumb, Smartweed) Annual herb naturalized from Europe. Calyx pink to dark purple. Habitat: "Waste & damp places" (Gray 1867) "Many habitats, mostly on moist soils" (Brown & Brown 1984). Frequency: "Coastal Zone" (Shreve et al 1910). A weed (Fogg 1956, Jaques 1959). "A common weed" (Brown & Brown 1984). Records: "Dry shaded area at Ivy Neck" (Stieber 1971). Ivy Neck, solitary near small barn on south bank of Colhoun's hog pond, Higman 1002 (CBC) (Higman 1977). Herbaria: CBC. US (Stieber 1971). 534. Polygonum prolificum (Small) Robinson 1902. B&B.404 (Polygonum ramosissimum prolificum Small 1894) (Proliferous Knotweed) Native annual herb. Habitat: "Saline to brackish marshes or shores" (Stieber 1971). Records: Manresa, near the Severn 6/20/1966, Stieber 193 (LCU) (Stieber 1967). Jct. of Rt. 648 and Rt. 2, shaded area 6/20/1966, Stieber 194 (LCU) (Stieber 1967). Herbaria: LCU (Stieber 1971). 535. Polygonum punctatum Ell. 1817. Shr.429, B&B.408 (Dotted Smartweed, Water Smartweed) Native perennial herb. Calyx white, tinged with pink. Habitat: "In open situations" (Shreve et al 1910). "Ditches and pond margins" (Fogg 1956). Wet shores, swamps, saltmarshes" (Stieber 1971). Frequency: "Throughout the state; common" (Shreve et al 1910). A garden weed in damp clayey soil (Fogg 1956). Records: Deale, in a saltmarsh at Cape Anne 9/26/1948, L. B. Smith (US) (Stieber 1967). N. of Ft. Meade at jct. of Balt.-Wash. Pkwy. 8/6/1966, Stieber 195 (LCU) (Stieber 1967). Patuxent R. at Rt. 50, riverbank 8/8/1966, Stieber 196 (LCU) (Stieber 1967). Java Farm, infrequent in both fresh and salt marshes, Higman 58, 159, 449 (CBC) (Higman 1977). 18 county brackish-marsh stations mapped by Sipple 1978. Hancock's Resolution (Envirens 1991). Jug Bay Wetlands Sanctuary (Mason et al 1991). Herbaria: CBC. US & LCU (Stieber 1971). 536. Polygonum punctatum Ell. var. leptostachyum (Meisn.) Small B&B: unlisted. (Smartweed)
(Bushy Knotweed) Large much-branched erect native annual herb.
538. Polygonum robustius (Small) Fernald B&B.408 [Persicaria robustior (Small) Bicknell] (Polygonum punctatum Ell. var. robustius Small) (Stout Smartweed) Native perennial herb. Ht. to 6 ft. Calyx white. Bristly at nodes. Habitat: "Shallow water or swamps" (Brown & Brown 1984). Heritage Rating: 1988: B2 (Highly State Rare). 1991: Endangered Extirpated. County Occurrence: Listed for Anne Arundel County by Matthews 1987. 539. Polygonum sagittatum L. 1753. Shr.429, B&B.413 (Arrow-leaved Tearthumb) Native annual reclining herb; four-sided stem with recurved prickles. Habitat: "Marshes, swamps and open wet situations" (Shreve et al 1910). Frequency: "Throughout the state; common." (Shreve et al 1910). Records: Wayson's Corner, in a roadside ditch 7/27/1966, Stieber 199 (LCU) (Stieber 1967). Patuxent Community Pond, with other Polygonum species along the pond's edge 9/23/1966, Stieber 198 (LCU) (Stieber 1967). Six county fresh-marsh stations mapped by Sipple 1978. Angels Bog (Whigham 1981). Severn Run 9/18/1983 (Sipple 1993). Picture Spring Branch (Nevamar Pond; Ecological Analysts 1983). Sawmill Pond 8/26/1989 (Sipple 1993). Meadow at NW head of Marley Creek between Rts. 10 & 648 7/22/90, Longbottom 900 (AACC). Marley Creek Swamp 9/30/90, Longbottom 1301 (AACC). Beachwood Park, Governors Bridge gravel pits (Longbottom 1991). Jug Bay Wetlands Sanctuary (Mason et al 1991). Sightings: Chase Creek watershed (Ruckers Pond). Severn Run Environmental Area (at Dicus Mill Road). Herbaria: CBC (CBC 1993). AACC. US & LCU (Stieber 1971). 540. Polygonum scandens L. 1753. Shr.429, B&B.413 (Climbing False Buckwheat, Hedge Cornbind) Native annual or perennial. A branching, twining vine to 20 ft. long. Habitat: "Moist thickets" (Gray 1867). "In cultivated grounds" (Shreve et al 1910). "In fence-rows, cultivated fields, waste land" (Jaques 1959). Frequency: "Throughout the state; frequent" (Shreve et al 1910). A weed (Jaques 1959). Records: Deale, at Cape Anne 9/26/1948, L. B. Smith (US) (Stieber 1967). Rt. 3, S. of jct. Rt. 424, twining on Lespedeza along sandy area 9/2/1966, Stieber 201 (LCU) (Stieber 1967). Fishing Creek Farm (Williams 1986b). Marley Creek swamp 9/30/90, Longbottom 1296 (AACC). Governors Bridge gravel pits (Longbottom 1991). Sightings: Chase Creek watershed; clearing by Ruckers Pond (Williams pc 9/7/1986). Herbaria: AACC. US & LCU (Stieber 1971). 541. Rumex acetosella L. 1753. Shr.429, B&B.397 (Sheep Sorrel, Common Sorrel, Red Sorrel) Low perennial herb naturalized from Europe. Lance-halberd leaves. Habitat: "An abundant weed in waste places and all sterile and worn fields" (Gray 1867). "Cultivated ground" (Shreve et al 1910). Shreve (1910, p.296) observes that an abundance of Sheep Sorrel characterizes a field in a poor or run-down condition. "In dry or sandy places; most persistent in poor, acid soil" (Jaques 1959). Frequency: "Throughout the state; common" (Shreve et al 1910). "Often becomes an exceedingly virile weed in lawns and gardens" (Fogg 1956). Records: Manresa, in fields and lawn 5/5/1966, Stieber 180 (LCU) (Stieber 1967). Wayson's Corner, common along roadsides 5/21/1966, Stieber 179 (LCU) (Stieber 1967). Patuxent R. at Rt. 50, in sandy loam 6/7/1966, Stieber 181 (LCU) (Stieber 1967). Throughout CBC, infrequent to moderately abundant along roads and in lawns or recently abandoned fields, Higman 590, 759, 1083 (CBC) (Higman 1977). Back Creek watershed (Williams 1989). Hancock's Resolution (Envirens 1991). Jacobsville Park, Poplar Ridge Park (Longbottom 1991). Jug Bay Wetlands Sanctuary (Mason et al 1991). BG&E transmission line r/w off Marley Station Boulevard by Sipple 6/3/2000 (see The Maryland Naturalist, Summer 2001). Sightings: Persistent in creeping juniper planter, Annapolis State Complex, Sept. 1992. Herbaria: CBC. US & LCU (Stieber 1971). 542. Rumex crispus L. 1753. Shr.429, B&B.399 (Curled Dock, Narrow Dock, Sour Dock, Yellow Dock) Tall perennial herb naturalized from Europe. Deep-rooted turf weed 1-4 ft. tall. Wavy or curly leaf margins. Habitat: "A very common weed in cultivated and waste places" (Gray 67). "In cultivated grounds" (Shreve et al 1910). "A weed...in pastures, fields and roadsides" (Jaques 1959). Frequency: "Throughout the state; common" (Shreve et al 1910). "A weed...can become an intractable pest" (Fogg 1956). Records: Patuxent R. at Rt. 50, at river's edge 6/7/1966, Stieber 182 (LCU) (Stieber 1967). Manresa, damp area in the lawn 6/24/1967, Stieber 183 (LCU) (Stieber 1967). Ivy Neck, infrequent in abandoned wheat field; Java Farm, infrequent on waste ground near buildings, etc., Higman 688, 852 (CBC) (Higman 1977). Back Creek watershed (Williams 1989). Hancock's Resolution (Envirens 1991). Herbaria: CBC. US & LCU (Stieber 1971). 543. Rumex obtusifolius L. 1753. B&B.399 (Broad-leaved Dock, Bitter Dock) Stout perennial herb naturalized from Europe. Broad, heart-shaped leaves. Habitat: "A rank weed...where old fields have been converted for... vegetables" (Fogg 1956). "Shaded roadsides and waste places" (Stieber 1971). Frequency: "A common weed" (Brown & Brown 1984). Records: Java Farm, solitary on Fox Point Road near old barn; Ivy Neck, solitary on old logging road in Scaffold Peninsula forest, Higman 523, 976 (CBC) (Higman 1977). Sightings: 190 Old River Road, Pines on Severn. Herbaria: CBC. US (Stieber 1971). 544. Rumex pulcher L. 1753 B&B.397 Slender, branching perennial herb naturalized from Europe.
545. Rumex verticillatus L. 1753. Shr.429, B&B.399 (Swamp Dock, Water Dock) Tall native perennial herb.
546. Tovara virginianum (L.) Raf. 1836 B&B.399 (Polygonum virginianum L. 1753) Shr.429 (Virginia Knotweed, Jumpseed) Native erect firm-rooted perennial herb. Central blotch on leaf.
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