Pseudechinolaena polystachya (Kunth) Stapf In Prain

Species

Angiosperms > Poales > Poaceae > Pseudechinolaena

Characteristics

Slender decumbent-spreading annual; culms 15 cm. to as much as 1 m. high, branching, rooting at the lower nodes, more or less pilose; sheaths mostly much shorter than the internodes, rather densely papillose-pilose or hirsute, especially toward the summit; ligule brown, about 1 mm. long; blades ovate-lanceolate, often unsymmetrical, 2-7 cm. long, 5-16 mm. wide, thin, acuminate-pointed, appressed-pilose on both surfaces; inflorescence 5-20 cm. long, the axis pilose, the slender distant racemes usually narrowly ascending; spikelets 3-4 mm. long, appressed or somewhat spreading, the pedicels 1-3 mm. long; first glume broad, acute, pubes-cent, a little shorter than the spikelet; second glume longer than the first, sparsely to densely covered with coarse hooked bristles; fruit about 2 mm. long, acute, smooth and shining.
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Soft, slender, short-lived perennial or annual, up to 400 mm high; often mat-forming; culms prostrate or trailing. Leaf blade up to 10-80 x 14 mm; ligule an unfringed membrane. Inflorescence of 2-6 racemes, scattered up a slender central axis; appears different as upper glume hooks only develop after fertilisation and delayed maturation of sessile spikelets causes an extended flowering period. Spikelets 3.5-5.0 mm long, laterally compressed, often burr-like, awnless; glumes ± equal, dissimilar; upper glume gibbous, as long as spikelet, translucent spots between nerves which usually have stiff hooked hairs after fertilisation. Florets 2; lower floret male or sterile; upper floret bisexual, lemma hard; anther 1.0-1.5 mm long. Flowering time Aug., Sept., Dec.-Apr.
Culms slender, stoloniferous, rooting and forming a loose mat, up to 50 cm tall. Leaf sheaths usually shorter than the internodes; leaf blades lanceolate, thin, 2–8 × 0.6–1.2 cm, glabrous or hispidulous, apex acute or acuminate; ligule 1–2 mm. Inflorescence narrow, 5–15 cm, bearing 3–5 loosely ascending racemes with distant spikelet pairs, lowest raceme 1–4 cm; pedicels 1–2 mm. Spikelets 4–5 mm; glumes papery, the lower lanceolate, 3-veined, acuminate, the upper thicker, navicular, 7-veined, with tubercle-based hooks between the veins; lower lemma 7-veined; upper lemma subcoriaceous, ca. 3 mm, pale, glossy. Caryopsis fusiform, ca. 2.5 mm, acute. Fl. and fr. Sep–Oct. 2n = 36.
Annual with slender prostrate culms, often forming a mat; culms 10–30 cm. high.. Leaf-blades 1–8 cm. long, 3–14 mm. wide.. Inflorescence 2–20 cm. long, the lowest raceme 1–6 cm. long, with distant spikelets.. Spikelets 3.5–5.7 mm. long; lower glume lanceolate to elliptic, almost as long as the spikelet, acute to acuminate; upper glume strongly gibbous, mostly as long as the spikelet, armed with hooked bristles or these often reduced to short appressed hairs; upper lemma subcoriaceous.. Fig. 131.
Soft slender, short-lived perennial or annual up to 400 mm high, often mat-forming; culms prostrate or trailing. Leaf blade 10-80 x to 14 mm; ligule an unfringed membrane, thin, truncate. Spikelet 3.5-5.0 mm long, obliquely ovoid, often burr-like; upper glume usually with stiff hooked hairs after fertilisation; anthers 1.0-1.5 mm long.
Soft slender perennial or annual (often mat-forming), up to 400 mm tall. Leaf blades 10-80 mm long, up to 14 mm wide. Culms prostrate. Spikelets 3.5-5.0 mm long (reduced spikelets often present), burr-like; upper glume usually with stiff hooked hairs.
Trailing annual with lanceolate leaf laminae, and often with aerial roots at the nodes.
Glumes acute to acuminate, wingless, the inferior almost as long as spikelet.
Spikelets 3.5–5.7 mm. long, obliquely ovoid.
Superior lemma subcoriaceous.
Culms 10–30 cm. high.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.4
Root system -
Rooting depth (meter) 1.5
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light 7-9
Soil humidity 4-12
Soil texture 1-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 10-12

Usage

Uses animal food environmental use fodder medicinal social use
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) 22 - 28
Size -
Vigor -
Productivity -

Distribution

Pseudechinolaena polystachya world distribution map, present in Angola, Burkina Faso, Bangladesh, Bolivia (Plurinational State of), Brazil, Central African Republic, China, Congo, Costa Rica, Ecuador, Ethiopia, Gabon, Ghana, Guinea, Guatemala, Guyana, Honduras, Indonesia, Kenya, Liberia, Moldova (Republic of), Madagascar, Mozambique, Nigeria, Nicaragua, Nepal, Panama, Peru, Paraguay, Rwanda, Sudan, Sierra Leone, Togo, Thailand, Tanzania, United Republic of, Uganda, Uruguay, Venezuela (Bolivarian Republic of), Viet Nam, South Africa, Zambia, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:211125-2
WFO ID wfo-0000894867
COL ID 6WCD6
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Echinochloa polystachya Echinolaena polystachya Lappago aliena Lappago oplismenoides Oplismenus oplismenoides Panicum heterochlamys Panicum nemorosum Panicum polystachyum Panicum uncinatum Tragus alienus Echinochloa echinata Echinolaena trinii Loxostachys uncinata Nazia aliena Panicum disjunctum Panicum glandulosum Panicum heteranthum Panicum trinii Pseudechinolaena polystachya Nazia racemosa var. aliena