CATALOGUE. 275 
margined, 3-4” wide (radical, and toward lower part of the stem); invo- 
_ lucre 3-leaved, leaves much exceeding the umbel; 3-4 rays of the umbel 
erect, many 8—14-flowered spikelets agglomerated into an oblong head; 
scales ovate, obtuse, 7—9-nerved, sides brown and midrib green; the bracts 
subtending the spikelets setaceous, nearly as long as the spikelet; achenia 
triangular-ovate, somewhat shorter than the scales; stigmas 3; stamens 
3.—Sanoita Valley, Arizona (600, 601). 
CyPERUS RoTUNDATUS, L., var. Hypra, Gray.—Nevada. 
Cyperus PHyMaTopES, Muhl. (C. repens, Ell; Bot. Mex. Bound.).— 
Southern Arizona (365, 400 a). 
Hemicarpua sussquarrosa, Nees.—A luxuriant specimen from Camp 
Lowell, Southern Arizona (715). It appears to me as though this genus 
rests on insufficient foundation, the inner scale being so often reduced to a 
minimum, and at times is wanting altogether. 
Eveocuaris paLustris, R. Br—Camp Grant, Arizona, furnishes a 
specimen (380) with the bristles shorter than the achenium; San Luis 
Valley, Colorado (927, 977). 
Exxocuaris acicutaris, R. Br.—Alkaline flats of San Luis Valley, 
Colorado (928). Bristles twice as long as the achenium. 
Scirpus paucirLorvs, Lightfoot—_Twin Lakes, Colorado (926). 
Scirpus PuNGENS, Vahl.—Denver (925), and Gila Valley, Arizona, at 
3,080 feet elevation (336). Nevada. 
Scmpus vauLipus, Vahl—San Luis Valley (930); Western New 
Mexico, at 6,500 feet elevation (104, Loew); also Arizona (330 a), with 
bristles to fruit longer than achenium; and Nevada. 
Scirpus Maritimus, L.—Nevada. 
ERiopHoruM poLystacHyon, L.—Twin Lakes (968). 
FimpristYuis CAPILLARIS, Gray—Southern Arizona (611, 624). Quite 
variable in size and in shape of fruit. 
: Cxapium EFrFusuM, Torr—Culms nearly terete, 3-7° high; elongated, 
linear leaves acutely serrate on back and margin; spikes small, several in 
a cluster, forming large, loose panicles; scales 4—7, the lowest empty, 
the top one with a perfect flower, and the one below it with a staminate 
flower.—Nevada. 
