276 BOTANY. 



Kobbesia* bciepixAj Willd. — Csespitose, 5^-8' high; leaves shorter than 

 the stem, the few small brown Bpikeleta clustered into a Bhorl terminal spike ; 

 lower flowers are female, and the tipper ones male. — Colorado. 



CAEExf gynocrates, Wormsk. — Mosquito, Colorado (1000); Twin 

 Lakes, Colorado, Professor "Wolf. 



Carex scirpoidea, Mx. — South Park, Colorado (1002); Mosquito, 

 Colorado; Professor Wolf 



Carex polytrichoides, Muhl — Twin Lakes, Wolf (1004). 



Carex obtusata, Lilij. — South Park, Colorado (1003). 



Carex Lyoni, Boott. — Twin Lakes, Colorado (1001). 



Carex siccata, Dew. — South Park (1009) ; Mosquito, Colorado 

 (1008). 



Carex Douglasii, Boott— Santa Fe, N. Mex. (31); Denver (1010). 

 Var. minor at Twin Lakes (1011). 



Carex Gay ana, Desv. — 1-2° high, slightly scabrous above ; leaves 

 1-2" wide, shorter than the culm; spikes ovate or oblong, of numerous 

 crowded spikelets, the lower sometimes compound, dioecious, or male with 

 a few female flowers, or female with a few male flowers, naked or with 

 one or two clasping setaceous bracts shorter than the spike; perigynia 

 dark chestnut-colored, shining, plano-convex, tapering to a very short coni- 

 cal beak, whitish at the nearly entire orifice, serrate above on the obtuse 

 margins, marked in front toward the somewhat cordate base with a 

 longitudinal furrow and a few nerves, nerveless on the back, the walls thick 

 and spongy; stigmas 2; scale chestnut-colored, more or less hyaline <-n the 

 margins, ovate-acuminate, cuspidate, longer than the perigynia ; achene 

 orbicular, dark chestnut. — Willow Spring, Arizona (232) ; South Park, 

 Colorado (225, 383, 384, very young). Otto Bockeler, in the Linnaea, vol. 

 39, p. 54, quotes C. Gat/ana as a synonym of C. divisa, Huds. But the 

 often dioecious spike of Gayana, its few-nerved, furrowed perigynium with 



* Koiu:i:siA, WilUl. — "Perennial herbs, with grass-like leaves, radical 01 sheathicg the sums at 

 the V) Be. Spikelets sessile in a terminal spike, simple or rarely branched at the base, with a ylume-like 

 bract uniler each spikelet. In each spikelet the lowest ^loino encloses an ovary with a Ion;; bifid Style, 

 the next one, or rarely '1 glomes, enclose '& stamens, and there isofteu a small rudimentary glome or awn 

 terminating the axis. Some spikelets have only one glome, endowing an ovary, and some, near tlie end 

 of the spike, have only one glome with I! stamens.''— Bent ham's Handbook of the British Flora, p. 



ICakkx.— 1'or the following careful elaboration of this genus,] am iodebb d to Mr. William Doutt, 

 of Boston. 



