BOTANY. 227 
embraced by the broad membranaceous margins of the rachilla, which at length separate and 
appear like 2 inner scales, in which character it accords with the subgenus Papyrus. This 
species is allied to C. ligularis, Linn. 
CYPERUS DISSITIFLORUS, Torr. Сур. p. 266. Western Texas; Wright. Resembles the last, but 
is a much smaller plant, with short rays and spikes; the spikelets acute, with narrower scales, 
etc. 
CYPERUS REPENS, Ell. Sk. 1, p. 69; Tor. Сур. p. 264. С. phymatodes, Muhl. Gram. р. 23. 
Hills near the Copper Mines, New Mexico, and dry ravines on the Limpia, western Texas; 
Bigelow. Sandy river-banks, San Luis Rey, California; Parry. (No. 1948, Wright.) 
CYPERUS SETIGERUS, Torr. & Hook. in Torr. Сур. p. 434. Ravines near Eagle Pass, on the Rio 
Grande; Bigelow. Western Texas; Wright. 
CYPERUS LUTESCENS, Torr. œ Hook. 1. c. Western Texas; Wright, (No. 705.) Perhaps tuo 
near the last species. n 
CYPERUS BALDWINII, Torr. Cyp. p. 70. Dry plains between the Pecos and Devil's river; Bigelow. 
CYPERUS TRACHYNOTUS (n. sp.): culmo valido foliisque glabro obtuse trigono ; umbella simplici 
J-6-radiata, radiis valde inequalibus ; involucro 3-4-phyllo longissimo ; spicis subglobosis 
polystachyis laxiusculis, spiculis lanceolatis compressis 10-14-floris; squamis parum remotis 
ovatis acuminatis apice subrecurvatis mucronatis, carina superne denticulato-spinulosa; stamina 
3; acheniis triquetris basi attenuatis (nigris) squama duplo longioribus. Rayines near the 
mouth of the Pecos and on Devil's river; Bigelow, Schott. (Nos. 704 and 1943, Wright.) I 
have this plant from Key West. It їз а well marked species, and does not appear to have been 
hitherto described. 
CYPERUS FILICULMIS, Vahl, Enum. 2, p. 328; Torr. Cyp. p. 267. Western Texas; Wright. 
CYPERUS OVULARIS, Torr. Сур. p. 218. Mariscus ovularis, Vahl, Enum. 2, p. 374. Western 
Texas; Wright. 
Cyperus HASPAN, Linn. Sp. р. 66; Kunth, Enum. 2, p. 34. C. gracilis, Muhl. Gram. р. 18. C. 
leptos, Schultes, Mant. 2, p. 105; Torr. Сур. p. 273. Western Texas; Wright. 
CYPERUS DRUMMONDII, Torr. d: Hook. in Torr. Сур. p. 437. Leone, western Texas; Bigelow, 
Wright. Differs from Drummond’s plant, in the somewhat compound umbel, longer rays and 
larger spikelets with the scales less closely set. We have specimens also from Louisiana and 
Florida, in which the umbels are compound, but the spikelets are smaller, like those of the 
original plant. 
CYPERUS VIRENS, Michz. Fl. 1, p. 28; Torr. Сур. p. 275. Moist favines, western Texas and 
New Mexico, near the Rio Grande ; Bigelow. 
CYPERUS ARISTATUS, Rottb; Kunth, Enum. 2, р. 23. C. inflexus, Muhl. Gram. р. 16, Torr. 
Сур. p. 274. Western Texas to California. (Nos. 1951 and 1955, Wright.) A widely-spread 
species, including perhaps most of the Cyperi belonging to the section Aristati of Kunth, so far 
as we can judge from the characters. 
Cyperus SCHWEINITZIT, Torr. Сур. p. 216. С. Houghtonii, Torr Г. c. Hills near the Copper 
Mines of New Mexico, and wet places, Rock Creek; Bigelow. (Nos. 703, 1944, and 1945, 
Wright.) Our numerous specimens show a gradual transition from C. Houghtonii to C. 
Schweinitzii. | 
FUIRENA SQUARROSA, Miche. Var. ARISTULATA, Torr. Сур. р. 291. Wet places, Leon Springs, 
Rio Coleto and other places in western Texas. 
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