CLVII. GRAMlNEiE (Stapf:). 
[ Digitaria. 
456 
emarginate-truncate. Upper floret thinly chartaceous, equalling the 
lower floret, margins of valve parallel, widely distant. Anther 
§ lin. long. Grain ellipsoid, slightly compressed from the back, 
§-§ lin. by almost J lin., very tightly enclosed by the delicate 
pale to dark dull brown husks ; scutellum elliptic, not quite reaching 
to the middle of the grain. — Stapf in Hook. Ic. PI. t. 3069. “ Iboruf 
Dudgeon, Agric. & Forest Prod. British West Afr. 149. 
Upper Guinea. Northern Nigeria : Hansa States ; cultivated at Zaria, 
Lamb, 54 ! 
Hansa name “ Iburu ” or “ Iboru Grown along with millet. 
25. D. botryostachya, Staff. Perennial, with a branched rather 
stout rhizome emitting more or less discrete flowering and barren 
shoots from plump extravaginal innovation buds covered with 
greyish-tomentose short broad cataphylls. Culms slender, erect, up 
to 1 ft. high, glabrous, with a single subbasal node, uppermost inter- 
node long-exserted. Leaves glaucous ; sheaths tight, finely striate, 
glabrous or the lower minutely hairy or scaberulous between the 
nerves ; ligules short, scarious, glabrous : blades linear, long-tapering 
to a fine point, of the basal leaves 3-5 in. long, of the cauline much 
shorter, 2-2 J lin. wide, flat, glabrous with some long fine spreading 
white hairs towards the base, margins cartilaginous, sometimes 
crisp, scaberulous upwards, lateral nerves numerous, very close 
and fine. Racemes 6-10, racemosely disposed on a slender upwards 
angular common rhachis 2-3 in. long, obliquely erect, solitary, J-l 
in. long, straight, the lower bare at the base or with arrested barren 
pedicels, glaucous ; rhachis very slender, up to J lin. wide, trique- 
trous, angles finely marginate, scaberulous to scabrid ; pedicels 
2-nate, filiform, angular, scaberulous, unequal, the longer f lin. long. 
Spikelets appressed, imbricate, lanceolate-oblong, acute to sub- 
acute, 1 \ lin. long, more or less silky on the sides, pale. Lower glume 
delicately hyaline, rounded, § lin. long, soon disappearing ; upper 
oblong, obtuse, or almost so, 1 lin. long, 5-nerved with a line of 
hairs on each side of the midrib and along the margins, marginal 
hairs much longer, up to | lin. long, very fine, slightly curled, with 
obtuse tips. Lower floret : valve lanceolate-oblong, acute to sub- 
acute, lj lin. long, 7-nerved, the inner 2 side-nerves on each side 
approximate with a line of usually appressed hairs between them, a 
fringe of often spreading white hairs along the margins, hairs as in 
the upper glume, the marginal up to over J lin. long ; valvule and 
lodicules minute. Upper floret lanceolate, shortly acuminate, 
very acute, lj lin. by f lin., thinly chartaceous, chestnut-brown. 
Anthers J lin. long. Stigmas orange. 
Nile Land. Abyssinia : Arussi Country ; Ardaga, Drake- Brockman, 131 ! 
This is possibly the plant which Chiovenda described and figured, from an 
nflorescence, as Panicum Rivce in Ann. lstit. Bot. Roma, vii. 62, fig. ii. ( Digi- 
taria Rivce , Stapf in Lew Bulletin. 1907, 213 ; Chiov. in Result. Scient. Miss. 
