56 
33. Trasus. 9. CYPERACEiE. 
Pl, end.pk. 
1. Trasi with androgynous spikes . 
1. Trasus pauciflor us. Fewflowered sedge. 
Spike androgynous, not branched, mostly 4< or 5-flowered; 
male flower terminal, mostly solitary ; fruit lanceolate, 
round, reflexed ; glume of the female flowers deciduous ; 
leaves long, convolute ; upper sheaths leafless. 
Carex patnla, Hudson FI. Ang.A02 , 657. 
Carex leucoglochin, Lin. Sup. 413. 
Carex pauciflora, Lightfoot FI. Scot. IAS. 
Alpine bogs; perennial; June. 
Root fibrous, in tufts ; culm 5 in. high, smooth ; leaves 
usually in pairs, only half as long as the culm ; spike ovate, 
oblong, acute ; fruit yellowish green, striated. 
2. Trasus atratus. Black sedge. 
Spikes androgynous, 3 to 5, on footstalks, crowded, ter- 
minal male in the lower part, fruitbearing, drooping; fruit 
subrotund, ovate, beak short, apex 2-toothed ; glumes ovate, 
acute ; bractece amplexicaul ; leaves crowded. 
Carex atrata, Lin. S. P. 1386. 
Alpine pastures ; perennial; June, July. 
Culm upright, 2 feet high, angles smooth ; leaves light 
green, broad, flat ; bractece leaflike, spreading ; spikes at 
first upright, afterwards drooping ; stamens 2 or 3 ; glumes 
black ; fruit yellow, ribless, smooth. 
2. Trasi with many spikes , of different sexes. 
a. Bractece membranous , leaflike ; terminal spike 
solitary , male; female spikes sessile ; fruit hairy. 
3. Trasus clandestinus . Concealed sedge . 
Male spike footstalked; female 2, usually 3-flowered, 
distant, nearly sessile, concealed in the bracteae ; fruit ob- 
ovate, obtuse, hairy, apex not nicked ; leaves channelled. 
Carex prostrata, Allioni Ped. 2,267. 
Carex clandestina, Goodenough L. T. 2, 167. 
On sunny rocks ; perennial ; May. 
Culms in tufts, 2 in. high, upright, 3-sided; leaves up- 
right, 3 times as long as the culm, dark green, edge very 
rough; rachis rough, hollowed out; male spike rather 
3-sided, linear, manyflowered; female spikes 2 or 3, distant, 
fewflowered; bractece obtuse, brown, sheathing; glumes 
pbtuse, dark brown. 
