^"'■^■^- CYI»ERACE.E. 231 



W.' l^.i "'^^^f*^^,^^'^"^ • Stem 1 to 21 feet l.igl,, sleiulor, scal.rous : leaves a line 

 broa 1, shorter tl.an the stem : spike 8 to 15 lines lon<s 3 to 5 lines thick, sometimes 

 nearly dia^cious, of a dull brown color, composed of n.any ovate crowded or con- 

 tij^uous closely imbricated sp.kelets 2 or 3 lines lon<( and a line thick, the upper 

 simple, the ower compound : bracts clasping, scale-like, setaceously pointe.l, the 

 lowest exceeding its sj.ikelet : perigynium nearly black at maturity, orbicular w th a 

 short, orovato with a longer bidentate beak, stipitate, plano-convex or the sharp 

 margins incurve.l nerved serrate above, equalling the ovate acute or cuspidate hya- 

 l.ne^margmed scale : nutlet ferruginous, oval, lenticular, produced at base. - Hook. 

 ±1. Eor.-Am. ii. 212, t. 213, and 111. i. IG, t. 45. 



Fion, Oregon a.,.1 tl.e Saskatcliewan to Soutlieni Califon.in, Utali and New Jfexico • on tl>P 



9. C. Gayana, pesv Rootstock creeping: stem 1 or 2 feet high, scabrous : 

 eaves a bne or^two broad, shorter than the stem : spike dark chestnut, 8 tolO lines 

 Jong and 4 to , tluck, oblong or ovoid, cai)itatc, dioecious or very nearly so, naked 

 or with 1 or 2 setaceous bra<;ts shorter than the stem, of numerous crowded spike- 

 Jets J to 4 lines long, the lower compound; scales mend.ranous, chestnut-colored 

 with hyaline margins, ovate, acuminate, cariuate, cuspidate : j.crigynium chestnut- 

 colore<l and shining, thick and spongy, broadly ovate or triangular in outline, very 

 convex or gibbous below on the outer sides, flat on the inner, long-li.ssuied on the out- 

 side, lew-nerved at the somewhat cordate stipitate base, serrate above on the sli^rhtly 

 winged margins, ending in a very short minute conical beak with a nearly e'^itire 

 Avhitish orifice shorter than the scale : nutlet dark cliestnut, orbicular, produced at 

 base. — Gay, II Chil. vi. 205, t. 73, fig. 3; ]]oott. 111. iii. 120, t. 411. 

 T^nnTr I?'' <^'''"'''").: in tl.e IJocky Mountains of Colorado and New Mexico, also in Chili 



10. C. Douglasii, Boott. Rootstock creeping : stem about a foot high, obtusely 

 angled, smooth : leaves 1 or 2 lines broad, tapering to an extremely slen<ler trianou- 

 Jar summit : bmcts scale-like, clasi-ing, cuspidate or the lowest prolonged beyond tlio 

 stem : spikes dia-cious or nearly so, oblong, pale or chestnut-colored or ferruginous 

 an inch or two long and G to 9 lines thick, of many ellipsoidal or ovoid crowded 

 spiJjelets, the upper simple, the lower compound and sometimes branchincr, often 

 Jia f an inch long : perigynium ovate or lanceolate-ovate, acuminate to a slender 

 oblupioly cut entire (at length bidentate) beak, stipitate, nerved, very convex on tho 

 outer sule, tho obtuse margins incurved, serrate above, sliorter than the ample mem- 

 branous oblong or lanceolate acute or cuspidate hyaline-margined scale- nutlet 

 chestnut-cQlored, suborbicular : stigmas very long. — Hook. FI. I3or.-Ain ii 213 

 t. 214. C. Nntlallii, Dewey, 1. c. Ixiii. 92, t. 2, fig. 97. ' ' 



Var brunnea, Olney. Taller, 10 to 22 incl'iesliigh": leaves equalling or loncrer 

 than the stem, which very rarely bears a second spike on a long (10 inches) filiform 

 subradical j.edunclo : lower bracts long-awned : spikelets fewer, tho lowest distinct : 

 scales chestnut-brown, — Bot. King Exp. 3G0. 



Frequent from Washington Territory and the Rocky Mountains of British America to New 

 Mexico and Northern Mexico ; in the Yosen.ite Valley (Boh.mlcr, n. 6199^ and in Mono Valley 

 Jirewer n. 1813 riie variety near Auburn and Sacramento Vity {Bolander, n. 4503, 4549, 4550), 

 and in Washoe Valley, Nevada, Stretch, JVcUson. . . ;, 



* * Spikelets androffi/nons, aggregated at the top of the stein. 



•»- Spi/celets male at the top. 



11. C. Hoodii, Boott. Stems very slender, sharply angled, scabrous: leaves 



1 to Ii lines broad, tho upper the longest, e(]ualling or exceeding the stem : bracts 



scaledike, ovate or the lowest setaceous, shorter than'thc stem : spike ferruginous, of 



