Pl.end.plu 9. CYPERACE^. S3. Trasus. 69 



34. Trasus pallescens. Tale sedge. 



Female spikes 2 or 3, elliptical ; glumes as long as the 



fruit, ovate, acute; fruit elliptical, inflated, obtuse; root 



fibrous ; leaves pale. 



Gramen cyperoides polystachiiim flavicans, spicis brevibus prope sum- 

 mitatem caulis, Jlaii Syn. 419, polyst. 8. 

 Carex pallescens, Lin. S. P. 1386, 



Grass lands and moist woods; perennial; May and June. 



Culm 18 inches high, leafy at bottom; leaves yellowish; 

 hracteoB much overtopping the culm ; male spike lanceolate, 

 upright, pale, ferruginous; glumes ovate, yellowish, rib 

 green; fruit pale green. 



III. 34., COBRESIA. Willdenow. Colresia, 

 Spathelles imbricate all round; spathellule 1, persisting, 



cartilaginous, involving the ovary ; stamens 3 ; stigmata 3, 

 downy; style dilated at the base, jointed; akenium horny, 

 smooth, crowned with the persistent base of the style, en- 

 closed in the persisting hardened glumule. — Roof perennial, 

 tufted; leaves linear, channelled, edge and keel rough; 

 culm round, naked above, angular; spike compound, mo- 

 noicous; hractece glumaceous, the lower one sometimes 

 leaflike. 



Colresia caricina. Carexlike Colresia* 



Spike contracted, subovate; spikelets 3 or 4, alternate, 

 imbricate, upper one male. 



Carex hybrida, Sckkuhr Car. 161. 

 Kobresia caricina, Willd. S. P. 4,205, 

 Cobresia caricina, Persoon Syn. 534. 

 Carex bipartita, Allioni Ped. 2301. 

 Schoenus monoicus, Eng. Bot. 20, 1410. 



Subalpine mountains ; perennial ; July. 



Root scaly ; leaves recurved, narrow ; culm erect, single, 

 9 in. high; spike erect; hractece ovate, membranaceous, 

 brown ; glumes brown, edge white. 



B. CYPERACEiE. Glumes 2-rowed ; flowers hermaphro- 

 dite ; glumelles none or bristlelike, 



IV. 35. CYPERUS. Theophrastus. Cyperus, 

 Spathelle 1, 2-rowed, keeled, all flowerbearing, equal; 



glumelle ; stamens 3 ; style not jointed to the ovary, de- 

 ciduous; stigmata S', akenium oblong, 3-sided. — Root creep- 

 ing ; culm 3-sided, base leafy ; leaves linear, keeled, edge 



