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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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Onoseris onoseroides (H.B.K.) B. L. Robinson
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PlaceOfPublication
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Proc. Amer. Acad. Arts 49: 514. 1913
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Synonym
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Isotypus onoseroides H.B.K., Nov. Gen. Sp. P1. 4: 12. tab. 307. 1820 (ed. 1818). TYPE: Venezuela, in hot areas near Tui River, Humboldt & Bonpland (not seen). Seris onoseroides (H.B.K.) Willd. ex Spreng., Syst. Veg. 3: 426. 1820. Onoseris paniculata DC., Prodr. 7: 33. 1838, nom. nud., cited under Isotypus onoseroides. Hilairia paniculata DC., Prodr. 7: 33. 1838, nom. nud., cited under Isotypus onoseroides. Caloseris rupestris Benth., P1. Hartw. 88. 1841. TYPE: Guatemala, mountain of Chorro, Hartweg (not seen). Schaetzellia deckeri Klotzsch, Allg. Gartenzeitung 17: 82. 1849. TYPE: Grown in the Decker family's private botanic garden in Berlin from seeds sent from Colombia (not seen). Rhodoseris conspicua Turcz., Bull. Soc. Imp. Naturalistes Moscou 24: 39, tab. 2. 1851. TYPE: Mexico, Juirgensen (not seen). Cataleuca rubicunda Koch & Fintelm., Wochenschrift Gartnerei Pflanzenk. 2: 163. 1859, nom. nud., substitute name for Isotypus onoseroides H.B.K. Onoseris isotypus Benth. & Hook., Gen. P1. 2: 487. 1873, substitute name for Isotypus onoseroides H.B.K. Seris conspicua (Turcz.) Kuntze, Rev. Gen. P1. 1: 364. 1891. Seris rupestris (Benth.) Kuntze, Rev. Gen. P1. 1: 364. 1891. Onoseris rupestris (Benth.) Greenman, Proc. Amer. Acad. Arts 41: 268. 1905. 0noseris conspicua (Turcz.) Greenman, Proc. Amer. Acad. Arts 41: 268. 1905.
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Description
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Shrubs to 4 m tall with gray, wooly stems. Leaves few, clustered primarily near the base of the plant, (12.5-) 20(-30) cm wide, (12-)38(-38) cm long, deeply parted, almost pinnately compound, the terminal segment cordate or sagittate, the remaining segments forming paired, ovate to lanceolate, dentate lobes along the petiole, above with wispy, scattered, long, white hairs, densely gray lanate beneath. Inflorescences paniculate, 140-450 mm tall; pedicles bracteate, lanate. Heads discoid, turbinate, 9-23 mm tall; involucral bracts in 7-8 series, lanceolate, acuminate, increasing in size inwards; receptacle flat, fimbrillate, florets 4-11 per head, the corolla red, zygomorphic, 5-parted with 1 tooth larger than the other 4, glabrous, 15-25 mm long. Achenes columnar, truncate, ca. 6 mm long, with 4-5 narrow ribs covered with long, ascending and short, yellow trichomes; pappus of numerous, yellow, setose bristles to 17 mm in length.
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Habit
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Shrubs
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Note
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Onoseris onoseroides is a striking species with red flowering heads. Its wide distribution from Guatemala to Venezuela and Colombia has led to its being described as a different species from several parts of its range. However, the characters such as more or less pubescence on the leaves appear to be simply geographical or even individual variation when plants from the entire range are examined.
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Specimen
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cIjI' : Caldera on Rio C/iriqui Viejo, Maurice 850 (US). Roadside from Paso Canoas to Caflas Gordas 18 mi from Paso Canoas, Quebrada de Vuelta, Croat 22223 (MO ).
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