213 
46. C. refractus, Engelm. (Beeckeler, in Linnza, xxxvi., p. 
369 ; see also Vasey, in Bull. Torr. Bot. Club, x., p. 32.) Trenton, — 
N. J., to North Carolina and Missouri. Appears to me nearest 
allied to C strigosus, but is also related to C. Lancastriensis, 
Porter. 
47. C. filiformis, Swartz. Southern Florida; also in the 
West Indies. The Florida specimens do not quite agree with 
C. Wright’s from Cuba. 
48. C. brunneus, Swartz. (C. purpurascens, Vahl; C. ligu- 
laris, Chapm., S. Flora, p. 507, not of L. nor of Chapm. Suppl., p. 
659.) Southern Florida (Curtiss, N. A. Plants, No. 3025*), and 
in the West Indies. 
49. C. ¢tetragonus, Ell. North Carolina and Florida (Cur- 
tiss, No. 3059) to Texas; also in Mexico (fide Hemsley.) 
50. C. dissitiforus, Torrey. Florida to Louisiana and 
Texas. (E. Hall, Plante Texan, No. 690, distributed as 
C. litos, Schultes) ; also in Mexico and Brazil (fide Beeckeler.) 
: Section 9. Papyri, Kunth. 
51. C. giganteus, Vahl. (C. erythrorhizos, Muhl., var. 
erectus, Britton, in Bull. Torr. Bot. Club, xi., p. 85; C. densi- 
Jtorus, Meyer.) Texas and Mexico (Herb. Berland. Texano- 
Mexicanum, Nos. 876, 3223 and 2306; Buckley; Nealley.) 
Cuba (C. Wright, No. 1529.) 
52. C. erythrorhizos, Muhl. Lawrence, Mass., (Robinson); 
Hartford, Conn., (fide Bishop, Cat. Plants Conn., p. 17); eastern 
Long Island (E. S. Miller); Camden, N. J., (Martindale), and 
southward to Florida and New Mexico; also in California. 
Var. pumilus, Engelm. (C. occidentalis, Torrey.) Missouri 
to California, extending northward to Oregon (E. Hall, Pl. 
Oreg., No. 558), and Washington (Suksdorf, 221.) 
53. C. HALEI, Torrey, ined., in letter to Mr. Charles Mohr, 
1868, who has kindly furnished me with the following descrip- 
tion: . 
" Umbels many-rayed, shorter than the involucral bracts; 
spikes cylindrical, one-half to three-fourths inch long, sessile or 
stalked, forming dense clusters with a few linear, acuminate in- 
volucels; ‘spikelets flat, 12 to 14-flowered; scales with scarious _ 
margins, brown, sharply carinate on the back, indistinctly — 
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