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(Last Modified On 6/20/2013)
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(Last Modified On 6/20/2013)
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Species
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Lycoseris latifolia (D. Don) Benth.
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PlaceOfPublication
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Bot. Voy. Sulphur 121. 1845.
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Synonym
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Diazeuxis latifolia D. Don, Trans. Linn. Soc. Lond. 16: 302. 1830. TYPE: Venezuela, near Caracas, Fanning (not seen). Carduus cernuus Bertol., Fl. Guatemala. 431. 1840. TYPE: Guatemala, Volcan d'Acqua, Velasquez (not seen). (A female plant in fruit.) Aster crocatus Bertol., Fl. Guatemala 434. 1840. TYPE: Guatemala, Volcain d'Acqua, Velasquez (not seen). (A male plant.) Lycoseris squarrosa Benth., Bot. Voy. Sulphur 121. 1845. TYPE: Panama, Gulf of Fonseca, Nicoya, Hooker (not seen). Lycoseris crocata (Bertol.) Blake, Bull. Torrey Bot. Club 53: 218. 1926. Lycoseris oblongifolia Rusby, Descr. S. Amer. PI. 162: 120. 1920. TYPE: Colombia, Smith 661 (US).
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Description
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Woody, branched, dioecious, scrambling shrub to 5 m tall; stems terete, tomentose when young, glabrescent. Leaves alternate, lanceolate, entire or inconspicuously serrate, acuminate, trinerved, shortly pedunculate, 18-43 mm wide, 110-180 mm long. Inf lorescences of solitary, terminal, many-flowered heads. Heads of 2 kinds; involucres of many imbricate series of ovate to lanceolate, entire, acuminate bracts often with the tips recurved; receptacles flat, naked; male heads ca. 35 mm wide and 25 mm long, the outer florets orange, to 15 mm long, the corolla ligulate, 2-3-dentate, the anthers lacking, the style and ovary nonfunctional, the disc florets with the corolla tubular, 5-parted, regular, ca. 15 mm long, the anthers functional, the ovary sterile; female heads orange, to 80 mm wide and 60 mm- long, the corolla of the outer florets often bilabiate, the outer lip 3-parted and the inner lip lacking or filiform, the style ca. 23 mm long, the ovary sterile, the disc florets narrowly tubular, 5-dentate, ca. 23 mm long, the anthers lacking, the ovary fertile. Achenes columnar, slightly constricted apically, glabrous, to 12 mm long, deep red-brown; pappus white, of numerous soft capillary bristles to 2.5 cm long.
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Habit
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shrub
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Distribution
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Lycoseris latifolia is a widespread species ranging from Guatemala through Venezuela and Colombia.
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Note
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The striking difference in size between the female and male heads led Bertolini to describe the female plant as a thistle (Carduus) and the male plant as an Aster. In fruit, the female heads do resemble thistles. According to Johnston (1949: 292) the male heads are deeper orange than the female, as well as being smaller.
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Specimen
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CANAL ZONE: Fort San Lorenzo, Burch et al. 1040 (GH, MO). Near water reservoir W of Cocoli, Croat 9164 (MO). Allbrook site, Dwyer & Robyns 33 (MO). Madden Dam Area, Ebinger 849 (GH, MO). Balboa Heights, Greenman & Greenman 849 (MO). Madden Dam area, Hunter & Allen 434 (MO). Curundui, Kozlovsky & Sawyer s.n. (MO). Madden Dam area, Porter et al. 4005, 4053 (both MO). Balboa, Sosa Hill, Standley 26413 (MO). Madden Dam area, Stern et al. 48 (MO). Fort San Lorenzo, Tyson & Blum 3669 (FSU, MO). CHIRIQUI: Guanabano, Croat 22625 (MO). DARIEN: Isla Saboga, Duke 10362 (MO). PANAMA: Isla del Rey, Duke 9537 (MO). Isla Chepillo, Duke 10333 (MO). San Jose Island, Johnston 1286, 1333, 1333A (all GH, MO). Sabanas near Chepo, Hunter & Allen 26 (MO). Chagres Valley around Alhajuela forests, Pittier 2355 (GH). W of Chepo on road to Panama City, Tyson 5375 (MO).
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