Poa trivialis L.
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Poa trivialis L., Sp. Pl. 67 (1753)
Poa trivialis L.
Nomenclature
L.
L.
1753
67
ICN
Poa trivialis L.
species
Poa trivialis
Classification
Vernacular names
Descriptions
Poa trivialis L.
Open, often wide-leaved, light to darkish green perennial tufts, c. 20-90 cm tall, stoloniferous; shoots extravaginal; laminae persistent. Sheaths light green, sometimes purplish, ± membranous, usually finely scabrous on nerves, especially near ligule, keeled; ligule 2.5-10 mm long, entire, smooth across top and tapered to a point, smooth abaxially apart from scattered very minute teeth; lamina 10- 20 cm × 1.5-7 mm, soft, flat, finely scabrous along nerves on both surfaces or smooth, margins and fine pointed tip finely scabrous. Culms 40-70 cm tall, erect, smooth, or finely scabrous below panicle. Panicle (5)-10-20 cm long, usually open and very loose; rachis smooth to finely scabrous above, branches fine, spreading, finely, densely scabrous, with numerous spikelets toward tips. Spikelets 3- 4 mm long, 2-3-flowered, green or purplish. Glumes ± unequal, finely scabrous on nerves, tips fine, acute; lower glume 1.5-2.5 mm long, 1-nerved, narrow-lanceolate, upper 2-3 mm long, 3-nerved, elliptic- to ovate-lanceolate. Lemma 2-3 mm long, 5-nerved, narrow-oblong, smooth and glabrous apart from short fine hairs to xh length on midnerve and a few short hairs on marginal nerves near base, and midnerve scabrous above hairs, margins and acute tip membranous. Palea 2-2.5 mm long, smooth between extremely minutely scabrous keels. Lodicules 0.2-0.4 mm long. Callus with a long slender tuft of fine crinkled hairs. Rachilla ± 0.5 mm long, smooth. Anthers 1.5-2 mm long. Caryopsis c. 1.5 × 0.5 mm, tightly enclosed by lemma and palea.
Poa trivialis L.
Open, often wide-leaved, light to darkish green, stoloniferous perennial tufts, c. 20-90 cm; branching extravaginal; leaf-blades persistent. Leaf-sheath light green, sometimes purplish, ± membranous, usually finely scabrid on ribs, especially near ligule, keeled. Ligule 2.5-10 mm, apically glabrous, entire, tapered to a point, abaxially with scattered very minute prickle-teeth. Leaf-blade 10-20 cm × 1.5-7 mm, soft, flat, finely scabrid on ribs or smooth; margins and fine pointed tip finely scabrid. Culm 40-70 cm, erect, internodes smooth, or finely scabrid below panicle. Panicle (5)-10-20 cm, usually open and very lax; rachis smooth to finely scabrid above, branches fine, spreading, finely, densely scabrid, with numerous spikelets toward tips. Spikelets 3-4 mm, 2-3-flowered, green or purplish. Glumes ± unequal, finely scabrid on nerves; lower 1.5-2.5 mm, 1-nerved, narrow-lanceolate, upper 2-3 mm, 3-nerved, elliptic- to ovate-lanceolate; tips fine, acute. Lemma 2-3 mm, 5-nerved, narrow-oblong, glabrous, but midnerve with short fine hairs on lower ½ and scabrid above hairs, marginal nerves with a few short hairs near base; margins and acute tip membranous. Palea 2-2.5 mm, keels extremely minutely scabrid, interkeel glabrous. Callus with long slender tuft of fine crinkled hairs. Rachilla ± 0.5 mm, glabrous. Lodicules 0.2-0.4 mm. Anthers 1.5-2 mm. Caryopsis c. 1.5 × 0.5 mm, tightly enclosed by anthoecium.
Taxonomic concepts
Collections
Identification keys
Metadata
29f234f1-141f-453a-97e0-262cbd02abb9
scientific name
Names_Plants
1 January 2000
24 April 2006