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(Last Modified On 7/29/2013)
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(Last Modified On 7/29/2013)
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Species
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Justicia pectoralis Jacq
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PlaceOfPublication
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Enum. PI. Carib. 11. 1760.
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Note
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TYPE: Dominica, West Indies (not seen).
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Synonym
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Dianthera pectorals (Jacq.) Gmelin, Syst. Nat. 2: 36. 1791.
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Description
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Herbs to 2 m tall; stems weak, erect or ascending, often rooting at the lower nodes, subquadrangular, grooved, glabrous to puberulous, the hairs retrorse. Leaves narrowly to broadly lanceolate, to 9.5 cm long, 2.5 cm wide, apically acuminate, basally acute to obtuse, the cystoliths dense and prominent above, not visible beneath, glabrous to strigose at the costa above, glabrous beneath, the margins entire to undulate; petioles short, to ca. 5 mm long, strigose above. Inflorescences in terminal, lax, spicate panicles to 25 cm long, 15 cm broad, the lower internodes of spicate branches ca. 2 cm long, the rachises and the peduncles glandular puberulous; bracts and bracteoles subulate, 2 mm long, 1 mm wide basally, puberulous and with a few glandular hairs. Flowers with 5-merous calyx, segments narrowly subulate, to 2 mm long, 0.5 mm wide basally, glandular puberulous; corollas white, lilac or purple, 8-12 mm long, puberulous outside, the throat transversely plicate, often spotted with dark purple, the tube nar-
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Habit
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Herbs
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Description
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rowly funnelform, basally 1.25 mm broad, 2.5 mm wide at the mouth, the upper lip erect, triangular, 3.5 mm long, 3 mm wide, apically acute, the lower lip spreading, to 5 mm long, 3-lobed, the lobes 1 mm long, the middle lobe 2 mm wide, the lateral lobes 1.5 mm wide, all apically obtuse; stamens exserted to about the tip of the upper lip, the anther cells slightly superposed, basally apiculate, the filaments glabrous. Capsules clavate, to 8 mm long, 2 mm wide, puberulous; seeds orbicular, flattened, 1.5 mm in diameter.
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Note
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This species is a common weed of roadsides and waste places at elevations near sea level in tropical America and the West Indies.
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Specimen
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CANAL ZONE: Roadside Madden Forest Road 1, Croat 8935 (MO). Ancon, near Gorgas Hospital, Croat 9235 (MO). BARRO COLORADO ISLAND: Croat 10253 (MO) Summit Garden, Croat 12831 (MO). Forest along banks of Quebrada La Palma and Cafion or Rio Chagres, 70-80 m, Dodge & Allen 17402 (MO). Albrook, U.S. Army Tropic Test Center Site, Dwyer & Robyns 51 (MO). Balboa Heights, Greenman & Greenman 5076 (MO). 1/2 mi S of Gamboa along Chagres, Lazor 2280 (MO). Boy Scout Road, Madden Dam area, second growth forest, Porter et al. 4028A (MO). Pueblo Nuevo, White 298 (MO). CHIBIQUi: 12.4 mi N of David, edge of steep river bank, Lewis et al. 723 (MO). COLON: Juan Mina Planta- tion, Rio Chagres, Region above Gamboa, 25 m, Allen 4112 (MO). DARIEN: Manene to mouth of Rio Cuasi, Kirkbride & Duke 1526 (MO). Camp Summit, Darien-San Blas border along Sea Level Canal Rt. 17, 1000-1200 ft, seasonal evergreen forest and weedy clearing, Oliver et al. 3665 (MO). PANAMA: Hills between Capira and Potrero, 80-130 m, Dodge & Hunter (MO). Chima6n, rocky beach, Lewis et al. 3365 (MO).
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