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Family: Urticaceae
Pennsylvania pellitory, more, hammerwort
[Parietaria obtusa Rydb. ex Small, more, Parietaria occidentalis Rydb., Parietaria pensylvanica var. obtusa (Rydb. ex Small) Shinners]
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Plant: annual herb; 4-60 cm tall; Decumbent, ascending, or erect, simple or freely branched
Leaves: narrowly to broadly elliptic, lanceolate, oblong, or ovate, (0.8-)2-9 cm long, 0.4-3 cm wide, longer than wide; apex attenuate to long attenuate or obtuse to rounded; base cuneate
Inflorescence: inglorescences of few flowered axillary cymes, the lowermost flowers usually perfect, those above pistillate
Flowers: subtended by bracts ca. 1.8-5 mm long; tepals ca. 1.5-2 mm long, the bracts exceeding the tepals
Fruit: achenes, symmetrical, 0.9-1.2 mm long, 0.6-0.9 mm broad, shining, hard and bony, ovoid, stipitate, enclosed by the perianth
Misc: Dry ledges, talus slopes, waste and shaded places, preferring soils with a neutral or basic reaction; to 2200 m (7200 ft); spring-late fall
REFERENCES: Boufford, David E. 1992. Urticaceae. Ariz.-Nev. Acad. Sci. 26(1)2.
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