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34 
dissolutis vesttto; culmo filiformi leviter eurvato subque- 
dripollicari compresso obsolete semieylindrieo profunde 
striato quam folia multo breviore,;, his parum remo- 
tis laete viridibus herbaceis recurvatis longe acuminatis 
planis apice triquetris, marginibus carinulaque setuloso- 
perscabris, 6 — 3 poll. long.; vaginis superioribus folii- 
feris antiee albido-membranaceis; ore transversim trun- 
eatis; spieula oblonga obtusa submultiflora in anthesi com- 
pressa 6--7 lin. longa 3 fineas fere lata; squamis dense 
imbrieatis subeonformibus coneoloratisve tenuiter membra- 
naceis oblongis oblusis spadireis ; utrieulis Zenuter stipitatis 
ovafo-trigonis basi rotundatis, superne in rostrum longiu- 
seulum ore scariosum bidentatum attenuatis, spadiceis. 
©. nigricans C. A. Mey. l. ce. 17. t. 7. — Boott, 148, 
t. 474, ' 
Rocky Mountains (Lyall.). 
22. €. rupestris Allioni. 
Rhizomate elonguto rumoso tenui stolonifero,; culmis e 
rhizomatis ramis solitariis tenuihus 6—2 poll. alt. trian- 
gulis, angulis acutis v. obtusiusculis, plerumque pl. m’ 
eompressis, sulcatis et striatis, sursum angulis scabridis, 
basi multifoliatis; foliis herbaceis confertis eurvatis flexuo- 
sisve angustis carinato - planis longissime angustato -acumi- 
natis, striatis, apice triquetris, marginibus serrulatis, eul- 
mum saepius subaequantibus; spicula «unguste oblonga v. 
sublineari, pluriflora Zaxiuseula 5 — 7 lin. longa (raro ad 
9 lin. long.) in anthesi ?/;——1 lin. lata; squamis remotiu- 
seulis grandiusculis membranaceis rotundato - obtusis uniner- 
viis disco rufo-brunneseentibus, margine lato tenuissimo hya- 
Iino-pallido eivcumdatis, foemineis orbiculato- ovatis basi 
amplectentibus, infima quandoque mucronata, maseulis 
