TRIANDRIA. MONOGYNIA. Carex 
111 
13. C. interfile 1 dia. Spike oblong, blunt; spikets many, the upper and the 
lower ones fertile, the middle ones barren; straw upright. 
14. C. divi'sa. Spike egg-shaped, somewhat doubly compound; floral-leaf 
upright ; spikets rather crowded; capsulets laid close; root creeping. 
15. C. muricata. Spike oblong, somewhat doubly compound; spikets not 
crowded; capsules diverging, cloven at the end; root fibrous. 
16. C. divuUa. Spike doubly compound, long, somewhat branched at the 
base; lower spikets distant, upper ones near together; capsules 
rather upright. 
IT. C. vulpi'na. Spike more than doubly compound, compact though 
branched, blunt; spikets barren at the top; capsules diverging; 
straws with very acute angles. 
18. C. panicula'ta. Spike (or branched panicle) more than doubly compound, 
acute: branches alternate, rather distant; capsules expanding; 
straw triangular. 
19. C. teretius cula. Spike more than doubly compound, branched but 
compact, rather acute: spikets crowded; barren floret at the top ; 
capsules expanding ; straw nearly cylindrical. 
(3) Spikes , one barren , the others fertile: floral leaves membranous . 
20. C. digitata. Sheaths membranous, not leaf-life, inclosing half the fruit- 
stalk: spike strap-shaped, upright; barren spike shortest; capsules 
distant. 
21. C-clandesti'na. Sheaths membranous, not leaf-like ; fertile spikes dis¬ 
tant, hardly higher than the sheath. 
(4) Spikes , one barren , the others fertile ; floral leaves leaf-like, generally 
sheathing the fruit-stalk. 
22. C. pen'dula. Sheaths long, inclosing all the fruit-stalk; spikes cylindri¬ 
cal, very long, pendent; capsules much crowded, egg-shaped, acute. 
23. C‘ strigosa. Sheaths long, inclosing all the fruit-stalk ; spike thread¬ 
shaped, limber, deflexed: capsules oblong, somewhat triangular, 
acute. 
24. C. prcecox. Sheaths short, inclosing nearly all the fruit-stalk; spikes 
near together; barren spikes club-shaped; fertile, egg-shaped; 
capsules nearly globose, pubescent. 
25. C. filifor'mis. Sheaths short, inclosing nearly all the fruit-stalk; bar¬ 
ren spikes generally two, strap-shaped: fertile spikes egg-shaped, 
distant; capsules hairy. 
26. C. fldva. Sheaths short, inclosing nearly all the fruit-stalk: the upper 
leaf-like part diverging; barren spike strap-shaped; fertile spikes 
roundish ; capsules beak-pointed. 
(27. C. ful'va. Lower sheath inclosing but half the fruit-stalk, upper ones 
nearly the whole : fertile spikes two, oblong, acute: capsules beaked; 
straw scabrous. E.) 
28. C. exterisa. Sheaths very short, inclosing all the fruit-stalk; the upper 
leaf-like part somewhat reflexed; spikes crowded; fertile spikes 
nearly globular; capsules egg-shaped, acute. 
