atoll research bulletin no. 392 the flora of - Smithsonian Institution ...

Recent introduction. Old World tropics. Occasional? Annual erect or ascending
grass, up to 60 cm high; leaves, 2 to 10 cm long and 3 to 7 mm wide, sheaths puberu-
lent; inflorescence, a branched raceme, 4 to 10 cm long, usually 2 to 3, rarely 6 to 8, in
number, smooth, but puberulent at the axils, with fingerlike, very narrow spikelets, 3 by
0.6 to 0.75 mm, linear-lanceolate, on pedicels, 2.5 to 3.5 mm long. Roadside weed.
3(58608)
Digitaria setigera Roth "crab grass", "slender crab grass"
ibugibugi, ibiugibiugi (N); te uteute (K)
syns. Panicurn pruriens Fisch. ex Trin.; Digitaria pruriens (Fisher ex Trin.)
Buse (in Burgess' list 1935); D. rnicrobachne (J. S. Presl) Henr.
Indigenous. S.E. Asia to Polynesia. Occasional. Densely-tufted creeping or
ascending grass, up to 60 cm high, with smooth slender stems; leaves, 6 to 20 cm long
and 3 to 8 mm wide, smooth hairy, with leaf sheaths at the base; inflorescence, an erect
slender raceme, 5 to 15 cm long, 3 or 4, rarely more, somewhat pubescent, with
numerous spikelets, about 2.5 to 3 mm long. Weed occurring in clusters or tufts in open
and ruderal habitats on the coastal strip. 2, 3, 5(83), 6(156), 7, 8(9551?).
Digitaria violascens Link. "smooth crab grass", "violet crab grass"
syns. D. argyrostachya (S teud.) Fern.
Recent introduction. Trop. Asia. Rare. Erect to spreading annual, sometimes
perennial, smooth-stemmed grass, up to 60 cm tall, forming dense clumps; leaves, 2 to 9
cm long and 3 to 6 mm wide, flat, slightly reddish, usually smooth, but often slightly
rough on the edges and sometimes with a few hairs near the base on the upper side;
inflorescence, composed of 2 to 9 slender finger-like branches, 2.5 to 10 cm long, at the
tip or along the upper 2.5 to 5 cm of the flowering stem, and very small dark-brown
spikelets, up to 2 mm. Weed occurring locally near Buada Lagoon. 3(58786).
Echinochloa colona (L.) Link. "jungle rice"
syns. Panicurn colonurn L.; Oplisrnenus colonus (L.) HBK.
Recent introduction. India. Occasional. Tufted erect to ascendant annual grass, 20
to 80 cm high, often decumbent at the base and rooting at the lower nodes, with flattened
often reddish-purple stems; leaves, 2.5 to 15 cm long and 3 to 10 mm wide, flat,
tapering, margins smooth or sometimes scabrous; inflorescence, a flowering - - stem (culm),
20 to 60 cm-high, bearing a panicle, 4 to 12 cm long, with very short green or purpletinged
alternating racemes, 1 to 3 cm long, with ovate spikelets, 1 to 3 mm long,
crowded in 4 rows on short pedicels. Weed in gardens around buildings. 4(150N), 5
(155).