268 CLVI. CYPERACE£ (CLARKE). | Kyllinga. 
Nut not enclosed in a utricle. 
Nut surrounded at the base by numerous hairs or 
bristles . . : . ; : : . 26. ERIOSPORA. 
Nut without hairs at the base. 
Nut-bearing spikelet containing male flowers or 
rudiments . : : - : : . 24, SCLERIA. 
Nut-bearing spikelet female, the flower pseudo- 
terminal. : : : : ; 
Nut enclosed in a utricle, i.¢., the 2 prophylla (brac- 
teoles) connate into a bottle-shaped body. . 27. CAREX. 
25. DIPLACRUM. 
1. KYLLINGA, Rottb. partly; Benth. et Hook. f. Gen. 
Pl. iii. 1045. 
Spikes. ovoid or cylindric, dense, with many small compressed 
spikelets. Spikelets of 4-7 distichous glumes, 1—-6-flowered; lowest 
(or several lowest) flower 2-sexual, perfecting a nut; uppermost flower 
sterile or uppermost glume empty; 2 lowest glumes smaller, empty; 
rhachilla in fruit falling off by disarticulation from a cushion below the 
lowest fertile flower. Stamens 1-3, anterior; anthers narrow oblong, 
not crested. Style not bulbous at the base; branches 2, linear, 1n 4 
plane passing through the rhachilla. Nut oblong or ellipsoid, com- 
pressed laterally, smooth.—Glabrous. Leaves all close to the base of 
the nodeless stem, green and long (except in K. pungens and K. peruv- 
tana). Inflorescence a head of 3-1 (very rarely 4—5) absolutely sessile 
spikes, subtended by 3-6 leaf-like bracts. When the spikes are 3, the 
middle one is often much longer than the others. 
Species 45, in all hot and temperate regions except Europe. A specially African 
genus. 
*THRYOCEPHALUM.—Keel of nut-bearing glume winged 
in fruit ; spikelets perfecting 1 (rarely 2) nut. 
Rhizome less than 3 in. long, usually 0. 
Spikelets § in. long, ina head 1—+ in. in diam. 
Wing of nut-bearing glume very strong, with 
conic teeth . : : : : . 1. K. squamulata. 
Wing of nut-bearing glume narrow, ciliate . 2. K. controversa. 
Spikelets {1 in. long, in a head 4 in. in diam. 
Head even in fruit very white; spikelets 
spreading : * : é ; 8. Kalba. 
Head pale dusky-cinnamon-coloured ; spikelets 
erect . : i : 5 : . 4, K. nigritana. 
Rhizome creeping, 3-10 in. long. : : . 5. K. monocephala. 
spikelets perfecting 1 (rarely 2) nut. 
Rhizome creeping, often flexuose; bracts rarely 
more than 3; head generally of one spike 
only. 
Spike of 6-12 lanceolate spikelets 7. K. paucifiora. 
Spike of very many spikelets. 
Head green, ultimately dull brown 6. K. brevifolia. 
Head more or less golden-tinged 8. K. erecta. 
