Cenchrus purpurascens Thunb.
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Details
Cenchrus purpurascens Thunb. (1794)
Cenchrus purpurascens Thunb.
Biostatus
Nomenclature
Thunb.
Thunb.
1794
ICN
Cenchrus purpurascens Thunb.
species
Cenchrus purpurascens
Classification
Vernacular names
Descriptions
Coarse grey-green tussocks of medium size, with narrow wiry leaves; branching intravaginal. Leaf-sheath hard, strongly keeled, glabrous, shining, brownish or often pinkish, margins membranous. Ligule 0.3-0.6 mm, a densely, shortly ciliate rim. Leaf-blade 15-30 cm × 1-1.5 mm diam., folded or involute, sometimes flat, linear, long-tapering, abaxially glabrous, adaxially often shallowly ribbed, ribs minutely scabrid, occasionally with a few soft hairs near ligule; margins minutely scabrid, tip acuminate. Culm 20-40 cm, erect, rounded or ± compressed, internodes loosely covered by fine, long, soft hairs near panicle. Panicle 7-12 cm, spike-like, cylindric, purplish; rachis and ± appressed branches and pedicels soft-hairy. Spikelets 5.5-6.5 mm, shortly pedicelled, densely clustered on rachis, narrow-lanceolate, acute, light creamy brown, minutely scabrid, greenish below, deep purple-brown towards apex, usually solitary within a much longer involucre of numerous, fine, erect, short-scabrid unequal bristles (15-25 mm), united at base; rarely 2 spikelets within involucre. Glumes « spikelet, unequal, submembranous; lower 0.5-1 mm, varying from nerveless, ± cuneate or rimlike, to longer-lanceolate, 1-nerved, upper 2-3 mm, c. ⅓ length of spikelet, faintly 5-(7)-nerved. Lower floret Ø: lemma 5-6 mm, ≈ spikelet, submembranous, 7-nerved, almost enclosing lemma of upper floret; palea 0. Upper floret ☿: lemma 5.5-6.5 mm, somewhat chartaceous, 5-7-nerved, ± enclosing palea; palea similar to lemma but slightly shorter, slightly rounded, nerves 2, glabrous; lodicules 0.2-0.5 mm; anthers 2.7-3.5 mm; styles connate below feathery stigmas, or sometimes partly or wholly free; caryopsis c. 2-2.5 × 1 mm, dark brownish.
Taxonomic concepts
Cenchrus purpurascens Thunb.
Cenchrus purpurascens Thunb.
Cenchrus purpurascens Thunb.
Cenchrus purpurascens Thunb.
Cenchrus purpurascens Thunb.
Cenchrus purpurascens Thunb.
Panicum alopecuroides L.
Cenchrus purpurascens Thunb.
Pennisetum alopecuroides (L.) Spreng.
Pennisetum alopecuroides (L.) Spreng.
Pennisetum alopecuroides (L.) Spreng.
Cenchrus purpurascens Thunb.
Pennisetum alopecuroides (L.) Spreng.
Cenchrus purpurascens Thunb.
Collections
Metadata
b61d54da-895a-4bc4-943a-dd958abc9c72
scientific name
Names_Plants
31 August 2011
7 November 2024