462 CLVI, CYPERACEE (CLARKE). | Fuirena. 
in F. abnormalis), nearly always with a long terminal bristle. Hypo- 
gynous bristles (in typical Muirena) 6, viz. 3 (sepals) linear, small or 
obsolete opposite the angles of the nut, 3 (petals) prominent, opposite 
the faces of the nut, ovate, obovate, or clawed petal-shaped ; but in 
many species (Sect. Hemiscirpus) the hypogynous bristles are setulose 
or 0, exactly as in Scirpus (with /solepis). Style linear, often short, with 
3 long branches ; style-base usually persistent on the nut, pyramidal, 
triquetrous, or ovoid, or linear-cylindric or very minute. Nut sessile, 
trigonous, obovoid or narrowly obovoid, falling off (# u-Fuirena) enclosed 
by the 3 inner hypogynous bristles (petals).—Stem triquetrous, nodose, 
with leaves throughout its length; sheaths cylindric; the lowest bract 
like the topmost sheath. Inflorescence paniculate-corym bose (not 
umbelled) ; panicle (when fully developed) elongate, thin, with remote 
lower branches; but often reduced nearly to a subterminal head, not 
rarely to few (or 3) spikelets. 
Species 26, in all warm countries. 
Fuirena is here separated from Scirpus by its nodose stem, and inflorescence 
not umbellate; this separates it from all the Tropical African species of Scirpus. 
The glumes being hairy on the back afford an additional distinction between 
Fuirena and Scirpus, except in our Fuirena abnormalis.—lt may be noticed, 
from the synonymy cited, that authors well entitled to their opinion place in Scirpus 
various species of our Fuirena, Sect. Hemiscirpus. 
*HEMISCIRPUS.—Hypogynous bristles either 0 or linear and retrorse-scabrid. 
Hypogynous bristles 0, or quite rudimentary and 
obscure. 
Glumes glabrous . i : : : z . 1. F. abaormalis. 
Glumes hairy ; nut white, Ae 
Leaves very narrow; glumes 5-ranked ss. . 3. F Welwitschit. 
Leaves up to } in. broad; glumes imbricated on 
all sides, 
Spikelets }-3 by tin. . 
Spikelets up to 3 by 2 in. 
Spikelets by scarcely j}, in. A : : 
Hypogynous bristles 6-4-3, longer than the nut, 
linear, rigid, brown, retrorsely scabrous. 
Spikelets brown; glumes 5-ranked; nut brown . 6, F. stricta. 
Spikelets black-green; glumes not 5-ranked; nut 
. EF. pubescens. 
on: pachyrrhiza. 
ed Oe Ppygmea 
Ov bo 
green . : E : : e . W. F. chlorocarpa. 
** WHu-FUIRENA.—Three interior hypogynous bristles with a broad lamina. 
Annuals. 
Spikelets 1-4 by 4-4 in... i 3 x . 8. FP. glomerata. 
Spikelets {3 by tev in. . : : 3 . 9. F. leptostachya. 
Perennials with a stout, creeping rhizome. 
Inner hypogynous bristles obovate, sessile. . 10. F. umbellata. 
Inner hypogynous bristles with a ciliate claw - 11. F. cinerascens. 
1. FP. abnormalis, (. B. Clarke. A glabrous annual, the panicle 
branches minutely scabrous. Stems tufted, 18 in. long, with sa 
throughout their length. Leaves 4 by lin. Panicle 7 by 2 in., wit 
distant axillary peduncles, several from each bract ; lowest bract similar 
