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(Last Modified On 9/27/2013)
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(Last Modified On 9/27/2013)
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Species
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Eriosema crinitum (H.B.K.) G. Don
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PlaceOfPublication
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Gen. Hist. 2: 348. 1832.
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Synonym
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Glycine crinita H.B.K., Nov. Gen. Sp. PI. 6: 421. 1823. TYPE: Venezuela, "montosis Novae Anda- lusiae, in Cerro del Cocollar," not seen. Rhynchosia crinita (H.B.K.) DC., Prodr. 2: 389. 1925. Eriosema pinetorum Standley, Field Mus. Nat. Hist., Bot. Ser. 8: 315. 1931. TYPE: British Honduras, not seen.
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Description
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Herb to subshrub; stems erect to ascending from a thick rootstock, puberulent to externally pilose. Leaves trifoliolate, leaflets linear to lanceolate, apically mu- cronate to acute, basally cuneate, the margins ciliate, 4.2-7.2 cm long, 0.7-1.2 cm wide, strigose above, glabrous below, the terminal leaflet exceeding the lateral leaflets; petioles 0.1-0.4 cm long, pilose; stipules lanceolate, connate, strigose externally, 1.0-1.6 cm long, 0.1-0.2 cm wide. Inflorescences not exceeding the leaflets, few-flowered, the peduncle 0.4-1.0 cm long; pedicels 0.4-0.5 cm long; bracts subtending the inflorescence 1.5 cm long, 0.3 cm wide; subtending brac- teoles caducous, 0.5-0.7 cm long, 0.1-0.2 mm wide. Flowers with the calyx 0.4- 0.9 cm long, the lobes 0.2-0.7 cm long, the upper lobe the longest, strigose; corolla yellow, 1.0-1.5 cm long, the standard obovate, 1.0-1.3 cm long, 0.7-0.8 cm wide, auriculate at the base, the claw 1.0 mm long, the wings oblong 1.0-1.1 cm long, 0.3-0.4 cm wide at the largest point, the claw 0.3-0.4 cm long; stamens 0.8-1.1 mm long, the vexillary stamen free; ovary sericeous. Fruit ovate, 1.2- 1.5 cm long, 0.5-0.7 cm wide, externally strigose; seeds ovoid, 2.0-4.0 mm long. 1.0-2.0 mm wide, black brown mottled.
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Habit
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Herb to subshrub
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Note
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Eriosema crinitum appears to have continuous variation throughout its range in Panama and is the most common Eriosema species occurring there. Eriosema crinitum occurs in savannas, campos, cerrados, usually in sandy soils, at 300- 2700 m. Grear (1970) has described three varieties which he considers to have distinct morphological characters well correlated with geographical distribution. Eriosema crinitum var. fusiformis (Rusby) Grear is separated by its smaller stat- ure and its whitish silky pubescence. Eriosema crinitum var. macrophyllum Grear is separated by its smaller fruits and more numerous flowers. Neither of the varieties has been reported from Panama or surrounding regions.
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Specimen
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CANAL ZONE: Anc6n Hill, Piper 5552 (US); Standley 25186 (US). CHIRIQUI: Boquete, Allen 4712 (GH, MO); D'Arcy 6313 (MO); Davidson 760 (F, MO). Sabana de la Tortuga between Boquete and Caldera 300-700 m, Pittier 3301 (US). Llanos del Volcan, 1120-1200 m, Siebert 339 (MO). COCLE: Nata, 50 m, Allen 829 (MO). Cerro Pil6n, 2700 ft, Dwyer 1051 (MO). Llanos outside Penonome, Ebinger 1030 (F, MO, NY). PANAMA: Hills above Campana, 600-800 m, Allen 1312 (MO). Between Chepo and El Llano in burned area, Croat 14491 (MO). Chepo, Dodge 16690 (MO). Savanna near Rio Pacora and Chepo highway, Duke 5897 (MO). Cerro Campana, Duke 6026 (MO); 2400-2700 m, Duke 8679 (MO, OSU, US). Between Rio Pacora and Chepo, Dwyer et al. 5091 (MO). Cerro Cam- pana, Ebinger 912 (F, GH, MO). 69 km W of Panama near Panamerican highway, Folsom 4109 (MO). 7 mi W of Chepo, Gentry & Tyson 1629 (MO, SCZ). Cerro Campana, Lewis et al. 3149 (MO); McDaniel 6820 (FSU); Nee 6846 (MO). Las Sabanas, Standley 25913 (US). W slope of Cerro Cam- pana, 2500 ft, Tyson et al. 2375 (FSU, NY, SCZ). Near Arraijan, Woodson 1401 (GH, MO). VERA- GUAS: San Jose, 18 km S of Santa Fe, 400 m, Nee 8173 (MO).
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