494 CLVI. CYPERACEE (CLARKE). [ Seleria. 
Nut reticulated or tubercled. 
Stems not dilated at the base. 
Spikelets 1-4 in lax clusters, suberect . . 15. 8. dregeana. 
Spikelets 8-12 in dense clusters. - . 15, S. schweinfurthiana. 
Stems dilated at the base into ovoid bulbs. 17S. bulbifera. 
Panicle manifestly compound. 
Nut smooth. 
Spikelets }-l in. long. : F : . 18. S. Rehinanni. 
Spikelets } in. long : : 3 c . 19. S. Welwitschii. 
Nut reticulated or tubercled. 
Spikelets mostly in clusters of 83-5. : . 20. S. Woodi. 
Spikelets many, solitary, some paired. 
Panicle lax; branches capillary. 5 . 21. S. multispiculata. 
Panicle dense; branches setaceous i . 22, S. poeoides. 
ttLithospermee. Less slender. Inflorescence very scattered ; bracts leaf-like. 
Perennial : c < . : = ; . 23. S. lithosperma. 
**ScLERIA.—Moneecious spikelets none or very few. Hypogynous aise generally 
conspicuous.—-Mostly stouter plants than those of tae subgenus Hypoporum, Bracts 
similar to the leaves. 
+Tessellate. Rhizowe 0 or hardly any, (All the species, except S. gracillima, very 
much alike.) 
Nut tessellated. 
Lowest axillary peduncle remote, much exserted, 
capillary, flexuose 
Nut 3-} in. long. Spikes undivided, of few 
spikelets : ‘ : : : : . 24, S. clathrata. 
Nut ;5 in. long. Peduncles often divided, with 
many spikelets . 28. S. nyasensis. 
Lowest axillary peduncle remote, ecareely exserted, 
straight, 
Stem smooth or very cates so. Nut large. 
Nut ovoid . F 2 ; . 25. S. foliosa. 
Nut cylindrie- ellipsoid ‘ é : . 26, S. glandiformis. 
Nut globose : 2 2 . 27. S. globonue, 
Stem minutely retrorse scabrous. Nut smaller . 29. S. complanata. 
Nut smooth. 
Stems medium-sized, not very slender. 
Nut broader tian long, depressed globose . . 80. S. schimperiana. 
Nut longer than broad. 
Dise with ovate minutely caudate lobes . . BL. S.canaliculato- 
triquetra. 
Dise truncate, lobes hardly any. . 82. S. Hildebrandtit. 
Stems, as the leaves and inflorescence, most wipuder 33. S. gracillima. 
t+tRhizome thick, creeping. All stout plants, with copious inflorescence. 
Stems erect. 
Nut smooth. 
Very stout, 3-6 ft. high, with large terminal dense 
panicle. : : . 34. S. oryzoides. 
Partial axillary remote panicles present. 
Partial panicles linear or linear-oblong dense . 35. S. melanomphala. 
Partial panicles pyramidal, open . . 37. S. ovuligera.— 
Nut with 40 longitudinal striations : : . 36. S. spiceforms. 
Stem rambling, 15 or 20 feet long often . a . 38. S. Bartert. 
