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(Last Modified On 10/16/2012)
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(Last Modified On 10/16/2012)
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Species
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TRISETUM IRAZUENSE
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PlaceOfPublication
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Proc. Biol. Soc. Washington 40:82. 1927.
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Synonym
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Trisetum gracile Fourn. Mex. P1. 2:108. 1886. Not T. gracile Boiss., 1845. Calamagrostis irazuensis Kuntze, Rev. Gen. P1. 2:763. 1891. Trisetum fournieranum Hitchc. Contr. U. S. Nat. Herb. 17:326. 1913. Trisetum scabriflorum Hitchc. Contr. U. S. Nat. Herb. 24:358. 1927.
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Description
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Loosely tufted, erect or somewhat decumbent perennial; culms flattened, 50- 90 cm. high, glabrous; lower sheaths crowded, densely villous, the upper distant, elongate, glabrous or nearly so; ligule erose, truncate, about 1 mm. long; blades flat, mostly 8-15 cm. long, 2-4 mm. wide, sparsely pilose on both surfaces; pan- icles 12-20 cm. long, suberect or nodding, the branches usually ascending, some- what flexuous, some of them naked at the base for 1-2 cm., as much as 7 cm. long; spikelets 5-8 mm. long, 2- to 3-flowered; glumes shorter than the spikelet, the first 4-5 mm. long, 1-nerved, narrow, acuminate, the second much broader, 5-6 mm. long, 3-nerved, abruptly acuminate; lemmas lanceolate, slightly toothed, 5- nerved, scabrous and minutely wrinkled on the back, the lowest one 5-6 mm. long; awn 7-10 mm. long, twisted in the lower third, inserted about one-third from the tip of the lemma.
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Distribution
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Paramos at high altitudes, mostly above 3000 m., Mexico to Ecuador.
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Specimen
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CHIRIQUI: Volcan de Chiriqui, Hitchcock 8209, 822I, 8224; Davidson I046; Wood- son & Schery 403.
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