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Project Name Data (Last Modified On 6/3/2013)
 

Flora Data (Last Modified On 6/3/2013)
Species Elephantopus angustifolius Swartz
PlaceOfPublication Nov. Gen. Sp. P1. Prodr. 115. 1788.
Note Based on Sloane, Voy. IsI. Madera 1: 256, pl. 148, fig. 4. 1707.-FIG. 7E.
Synonym Orthopappus angustifolius (Swartz) Gleason, Bull. New York Bot. Gard. 4: 237. 1906.
Description Perennial subacaulescent herbs, mostly 30-120 cm tall with a short rootstock. Leaves crowded near the base forming a rosette, oblanceolate-oblong, basally long-attenuate, apically rounded-acute, sparsely crenate, 5-50 cm long, 1-3.5 cm wide, at least 31/? times longer than wide, coriaceous, green throughout, appressed- pubescent with somewhat silvery strigose trichomes, the trichomes 0.3-0.6 mm long on the lamina above (longer on the veins), 0.5-1.0 mm long beneath, incon- spicuously veined above; petioles obscure, expanded and clasping at the base. Inflorescence solitary, spicate, simple or sparingly branched, of many glomerules each subtended by one or more lanceolate bracts to 8 mm long; peduncles appressed-pubescent; glomerules with ca. 20 heads, hemispheric, to 1.2 cm high and 2.5 cm wide. Heads with 4 florets; involucral bracts 8, similar, in 2 decussate series, minutely sericeous, the outer 4 ovate, 3-6 mm long, the inner 4 lanceolate- oblong, 6-10 mm long; corolla white to lavender, the tube slender, ca. 6 mm long, the limb ca. 2.0 mm long, deeply divided on the adaxial side, 5-parted, the lobes linear, ca. 1.6 mm long; anthers ca. 1.2 mm long, basally sagittate, the apical appendages 0.08-0.1 mm long; style branches slender, 0.5-0.8 mm long. Achenes obovoid, slightly flattened, 10-ribbed, 1.9-2.2 mm long, 0.5-0.6 mm wide, dark- brown, strigulose or hispidulous; pappus of 25-40 straight bristles in 1 series, the bristles 6.0-7.5 mm long, gradually dilated at the base to 0.12 mm wide, appressed- puberulent.
Habit herbs
Note Elephantopus angustifolius was placed in a separate genus, Orthopappus, primarily on the basis of the large number of pappus bristles in this species. However, there are various degrees of this tendency in other species of Elephan- topus, and the segregation of E. angustifolius in a separate genus is not justified.
Distribution occurrence in open savannas from Vera Cruz and the West Indies south through Central and South America to northern Argentina and Uruguay. Although formerly known from a number of localities in Panama, it has in recent years been collected from only two localities, Cerro Campana and Tocumen.
Note It has been collected throughout the year, but principally in the dry season, from November to March.
Specimen CANAL ZONE: Ancon Hill, Greenman & Greenman 5115 (MO). Cerro Ancon, Heriberto 47 (US). Ancon Hill, Standley 25184 (US). Ancon Hill, Standley 26319 (MO, US). cHJRIQui: Between El Boquete and Caldera, 300-700 m, Pittier 3338 (US ). COCLE: Between Porto Posada and Penonome, Williams 157 (NY). PANAMA,: Isla Taboga, Allen 1274 (GH, MO). Between Panama and Chepo, Dodge et al. 16657 (MO). Cerro Campana, Duke 5964 (GH, MO). Tocumen, Dwyer 4400 (FSU). Cerro Campana, Ebinger 943 (GH, MO, US); Lazor 3347 (FSU). Taboga Island, Macbride 2840 (GH, US). Sabanas, Paul 344 (US). Tocumen, Standley 26501, 29400 (both US). Arraijan, Woodson et al. 1389 (GH, MO, NY, US).
 
 
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