(Last Modified On 3/20/2013)
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(Last Modified On 3/20/2013)
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Species
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Chamaesyce hirta (L.) Millsp.
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PlaceOfPublication
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Publ. Field Mus. Nat Hist., Bot. Ser. 2: 303, 1909.
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Synonym
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Euphorbia hirta L., Sp. P1. 454, 1753. Euphorbia globulifera H.B.K., Nov. Gen. Sp. P1., 2: 56, 1817.
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Description
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Herb, annual; decumbent to 3 dm. Stems few, to 2 mm diam, tomentose and with abundant multicellular hairs which are often brown or purple, rarely merely tomentose. Leaves membranous; stipules distinct or joined at base, somewhat lacerate, to 1 mm long; blades ovate to lanceolate, often rhombiform, 10-35(-55) X 5-15(-25) mm, glabrate on upper surface, green or red often with purple spot, the base rounded to cuneate, the margin serrate, the apex obtuse to acute. Cyathia in dense terminal and axillary glomerules formed of condensed leafless dichasia, strigose; glands minute, purple, the appendages obsolete to three times as wide as gland. Capsule strigose, ovid, to 1 mm long, 1 mm wide; seed cuneiform, 0-8 mm long, 0.4 mm wide above base, the angles subequal, the faces concave, obscurely transversely ridged or wrinkled, tan, red-brown or gray.
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Habit
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Herb
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Distribution
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A pantropical weed. Widespread- and extremely common in all disturbed areas in Panama.
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Specimen
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BOCAS DEL TORO: Bocas del Toro I Airport, Lewis et al. 787 (MO, UG, US); vie of Chiriqui Lagoon, von Wedel 539 (MO); Old Bank I von Wedel 1868 (MO); Water Valley, von Wedel 1748 (MO). CANAL ZONE: Ancon, Greenman & Greenman 5009 (MO); western slope of Ancon Hill, Seibert 111 (MO); Barro Colorado I, Hayden 1 (MO), McDaniel 5027 (FSU, MO), Woodworth & Vestal 408 (F); id, Miller Trail, Shattuck 41 (F); vie of Corrosion Lab, Duke 4441 (DAV,'MO), Stern et al. 63 (MO); Chagres, Isthmus of Panama, Fendler 274 (BM, K, MO, W); Culebra I, Duke 4632 (DAV, MO); Fort Clayton, Cardenas Creek area, Tyson 1290 (FSU), Dwyer 2787 (MO); Fort Kobbe, Duke 3907 (MO), 3932 (MO), Woodson iet al. 1429 (F); Fort San Lorenzo, Burch et al. 1029 (GH, K, MO, UC, US); E of Gatun locks, Duke 4298 (DAV); Gamboa, Petersen s.n. (F); vie of Salamanca Hydrographic Sta, Rio Pequeni, Woodson et al. 1616 (F, MO); Sosa Hill, Duke 4659 (DAV, MO). CHIRIQUI: David airport, Lewis et al. 744 (GH, K, MO, UC, US). COCLE: Rio Hato airstrip, Burch et al. 1140 (F, GH, K, MO, NY). COLON: Col6n, vacant lot, MacBride & Featherstone 5 (F), Rodway s.n. (K); 2.4 mi S of Pifia, Lewis et al. 1850 (GH, MO, US). DARIEN: vic of Boca de Cupe, Allen 893 (F, MO); El Real, Burch et al. 1053 (GH, MO, US); Rio Sabana, Leopold III 106 (MO); 2 mi E Santa Fe, Tyson et al. 4826 (MO); vie of Santa Fe, Duke 9486 (MO). HERRERA: Rd from La Avena to Pese, Burch et al. 1286 (MO, UC); banks of Rio Santa Maria, Burch et al. 1200 (GH, MO); rd betw Las Minas & Pese, Burch et al. 1346 (K, MO), 1348 (GH, MO, UC, US); 12.5 mi S of Ocui, Lewis et al. 1660 (GH, MO, US). LOS SANTOS: Playa de la Concepcion, Burch et al. 1263 (F, GH, MO, NY). PANAMA: Isla Taboga, Woodson et al. 1502 (F, MO); Panama City, Petersen s.n. (F); rd to Ojus de Agua, ca 5 mi N of Panama City, Stimson 5052 (DUKE, MO).
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