Digitaria nuda Schumach.

Naked crabgrass (en)

Species

Angiosperms > Poales > Poaceae > Digitaria

Characteristics

Annual; culms 15–100 cm. high, decumbent at the base and geniculately ascending.. Leaf-blades broadly linear, 2–20 cm. long, 3–10 mm. wide.. Inflorescence digitate (axis up to 2 cm. long in robust specimens), of 2–20 racemes; racemes slender, straight, 4–20 cm. long, with or without sparse white hairs, the spikelets binate and overlapping by about 2/3 of their length on a winged rhachis with triquetrous midrib.. Spikelets narrowly elliptic, 1.7–2.5 mm. long, sharply acute; lower glume wanting or inconspicuous; upper glume 2/3–3/4 as long as the spikelet, 3-nerved; lower lemma as long as the spikelet, 7-nerved, the nerves smooth and evenly spaced (occasionally the pedicelled spikelet with a wide interspace flanking the midnerve), appressed puberulous to silky pubescent, often encompassed by a ciliate frill; fruit ellipsoid, grey to light or greyish brown.
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Tufted annual, 200-500 mm high; culms decumbent or creeping, sometimes mat-forming, geniculate or ascending, rooting at lower nodes. Leaf blade 20-135 x 2-10 mm; ligule an unfringed membrane. Inflorescence digitate or subdigitate, of 3-8 racemes; rachis triquetrous, winged, glabrous with scaberulous margins; pedicels triangular, scaberulous; spikelets abaxial, paired. Spikelets 1.6-2.3 mm long, dorsiventrally compressed; lower glume absent, if present, then a minute obscure scale < 0.2 mm long; upper glume shorter to as long as spikelet, 3-nerved; internode absent. Florets 2; lower floret sterile, lemma lanceolate, as long as spikelet, 7-nerved, nerves usually smooth, pubescent; upper floret bisexual, lemma ± as long as spikelet, yellow, brown to greyish, margins flat and covering most of palea. Flowering time Nov.-Apr.
Tufted annual 200-500 mm high; sometimes mat-forming; culms decumbent or creeping, geniculate, rooting at lower nodes. Leaf blade 20-135 x 2-10 mm. Inflorescence digitate or subdigitate, of 3-10 racemes 40-120 mm long; rachis triquetrous, winged, margins scabrid; pedicel triangular, scaberulous; spikelets paired. Spikelet 1.6-2.8 mm long; lower glume absent, or a minute obscure rim less than 0.2 mm long; upper glume shorter to as long as spikelet, narrow, 3-nerved; internode absent; lower lemma as long as spikelet, adpressed hairy, 5-7-nerved, nerves smooth; upper lemma slightly shorter to as long as spikelet, exposed, yellow, brown to greyish; anthers 0.6-0.8 mm long.
Annual, tufted, up to 500 mm tall. Leaf blades 20-135 mm long, 2-10 mm wide. Culms decumbent at base, geniculate and ascending, rooting from lower nodes. Spikelets 1.6-2.3 mm long, 0.8 mm wide. Racemes 3-8, digitate or subdigitate, 40-100 mm long; lower glume absent, or if present then a minute rim, obscure.
Annual, tufted, up to 500 mm tall. Leaf blades 20-135 mm long, 2-10 mm wide. Culms decumbent at base, geniculate and ascending, rooting from lower nodes. Spikelets 1.6-2.3 mm long, 0.8 mm wide. Racemes 3-8, digitate or subdigitate, 40-100 mm long; lower glume absent, or if present then a minute rim, obscure.
An annual grass. The stems are elbowed and reach 1 m high. It is creeping and can form mats. The stems are 10-50 cm long. The seeds are about 0.8 mm long.
Superior lemma as long as to slightly shorter than the spikelet, oblong-lanceolate, acute, pale yellow to reddish brown, sometimes bluish grey.
Inferior lemma as long as the spikelet, oblonglanceolate, 5–7-nerved, nerves smooth, mostly (but not always) equidistant, appressed hairy.
Superior glume 1/2–2/3 of the spikelet, oblong triangular, 3-nerved, appressed hairy, hairs fine, smooth, acute, hyaline.
Leaf laminae (2)5–12 × 0.3–0.6(0.8) cm., linear, flat, scaberulous on both surfaces, scaberulous along the margin.
Inflorescence composed of 2–10 racemes, (3)7–12 cm. long, in one or two superposed whorls of 2–5 racemes each.
Pedicels 2-nate, 0.5–2 mm. long, triangular, scaberulous, slightly broadened at the apex.
Rhachis triquetrous, winged, up to 0.7 mm. broad, smooth with scabrous margins.
Inferior glume shorter than 0.2 mm., poorly developed or even absent.
Culms 10–50 cm., glabrous, nodes dark and (sub)glabrous.
A creeping or decumbent, sometimes mat-forming annual.
Leaf sheaths scaberulous, sometimes loosely hairy.
Spikelets 2–2.8 mm. long, oblong to lanceolate.
Ligule 1–2 mm. long, truncate, erose.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.2 - 0.5
Root system creeping-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

It is a tropical plant. It grows in waste places across West Africa.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

Uses animal food food gene source
Edible seeds
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

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

Distribution

Digitaria nuda world distribution map, present in Benin, Burkina Faso, Bolivia (Plurinational State of), Brazil, Comoros, Dominica, Ethiopia, Ghana, Guinea-Bissau, Guyana, Honduras, Haiti, Jamaica, Kenya, Moldova (Republic of), Madagascar, Mali, Myanmar, Mozambique, Mauritius, Namibia, Nigeria, Philippines, Puerto Rico, Paraguay, Réunion, Sudan, eSwatini, Chad, Togo, Thailand, Tanzania, United Republic of, Uganda, Venezuela (Bolivarian Republic of), South Africa, Zambia, and Zimbabwe

Conservation status

Digitaria nuda threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:329018-2
WFO ID wfo-0000864209
COL ID 363NJ
BDTFX ID 168363
INPN ID 732273
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Axonopus digitatus Digitaria borbonica Digitaria nuda Milium digitatum Panicum digitatum Agrostis digitata Digitaria jamaicensis Panicum diamesum Digitaria diamesa Digitaria digitata Syntherisma digitata Paspalum digitatum Digitaria adscendens var. rhachiseta Digitaria ciliaris var. rhachiseta Digitaria sanguinalis var. rhachiseta Panicum horizontale var. subcompositum Panicum sanguinale var. digitatum