HORDEAE 165 



6. HEMICARPHA Xees. 



Low, tufted, mostly annual, grass-like herbs about 4 inches 

 liigh or less, with erect or spreading slender leaves and small ter- 

 nr.nal head-like or solitary spikelets with 1 to 3 leaf-like braots 

 surrounding thera and much exceeding them; glumes spirally OTer- 

 lapping, deciduous; perianth wanting; stamens 1; achene obovate- 

 ol)ioiif,', little compressed, brown. 



I. Hemicarpha micrantlia (Vahlj Britton. In wet soil 



beside streams, elf.; in the Soiioran Zones. 



7. CAREX L. Sedge. 



Perennial grass-like plants with 3-rankcd leaves, mostly 

 3-angled culms; flowers unisexual, monoecious or dioecious; peri- 

 anth wanting; stamens 3; ])istillate flowers a single pistil with 2 or 

 3 stigmas, in a saek-"ike i>erigynium, this completely enclosing the 

 achene; aehenes 3-an,oled (r lenticular. 



A very large genu? of which the following listed species 

 probably represent only a pnrt of those indigenous to New Mexico. 

 Collectors rare'y take the trouble to examine the plants unless their 

 attention is particularly ca'lcd to them. There are no doubt several 

 species common in the high mountains at the northern part of the 

 State which have not been collected. 



Spikes terminal, usually simple (androgynous.) 



f Plants densely cespitose; leaves filiform, i 



^ terete. 1. C. filifolia. ' 



Plants stolon) ferous; leaves linear-lanceolate, 

 I flat. 2. C. obtusata. ' 



Spikes several, sometimes crowded. 



Spikes aggregated into a single round or 

 ovoid head. 

 Stigmas 3; scales purplish black. 23. C. nova. ~^ 



Stigmas 2; scales brown, or grreen on the 

 margins. 

 Perigynium ovate to suborbicular, rather ;- 



light brown, green on the margin. 12. G. festiva. 



Perigj'niimi lancsolate, dark brown and 



ahinlng. IS. •. ei0n«ti. ^ 



