Trisetum tenellum (Petrie) A.W.Hill
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Details
Trisetum tenellum (Petrie) A.W.Hill (1938)
Nomenclature
(Petrie) A.W.Hill
Petrie
A.W.Hill
1938
ICN
species
Trisetum tenellum
Classification
Descriptions
Trisetum tenellum (Petrie) A.W.Hill
2n = 28
2n = 56
Trisetum tenellum (Petrie) A.W.Hill
Small tufts 2-35-(55) cm, with slender, often almost filiform culms usually » grey-green often involute leaves at maturity; branching extravaginal. Leaf-sheath 0.5-2 cm, glabrous, or sparsely finely prickle-toothed on ribs to densely pubescent. Ligule 0.2-1 mm, truncate or rounded, ciliate. Leaf-blade 1-12-(18) cm × 0.3-1.5-(2) mm, abaxially glabrous to finely scabrid to pubescent, sometimes with scattered long hairs, adaxially ribbed, minutely scabrid to shortly pubescent; margins minutely prickle-toothed, occasionally with scattered long hairs. Culm (1)-2-20-(45) cm, internodes glabrous, or sometimes densely pubescent with ascending or tangled spreading hairs, occasionally hairs retrorse below. Panicle 0.5-8.5 × 0.5-1.2 cm, ± spike-like with very short close-set branches but rachis visible, or more open with short ascending branches; rachis glabrous and branches with a few minute prickle-teeth, or rachis and branches pubescent. Spikelets (3.5)-4-5.5 mm, pale green or red-tinged. Glumes subequal, membranous, keels with prickle-teeth in upper ⅓ to upper ½; lower ≤ upper, elliptic, very rarely oblong-lanceolate, upper ≤ spikelet, broadly elliptic; margins with very minute prickle-teeth near obtuse to acute rarely almost mucronate tip. Lemma 3.5-5 mm, minutely bidentate, papillose, minutely scabrid near keel; awn 2-3-(4) mm, insertion in upper ¼ of lemma. Palea minutely prickle-toothed on keels except near base and sparsely minutely prickle-toothed on margins. Callus hairs 0.2 mm. Rachilla hairs few, to 0.8 mm. Lodicules c. 0.7 mm, glabrous. Anthers 0.6-1.3 mm. Gynoecium: ovary c. 0.7 mm; stigma-styles c. 1.2 mm. Caryopsis c. 2 × 0.5 mm.
Taxonomic concepts
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Trisetum tenellum (Petrie) A.W.Hill
Collections
Metadata
dc78f98a-aba1-4380-b51a-61169b97a6de
scientific name
Names_Plants
1 January 2000
10 March 2024