SYNOPSIS OF THE FLORA OF COLORADO. 49 



CEREUS PHCENICEUS, Eng. Syn. 1. c., p. 28. Heads 2'-3' high, 

 2' thick, generally forming dense hemispherical masses 1 or more in 

 diameter, ovate or subglobose, 9-11 ribbed; areolae ovate-orbiculate, 

 somewhat crowded ; spines setaceous, straight, radial ones 3-12, up- 

 per ones a little shorter, central ones 1-3, bulbous at base, terete, a 

 little stronger, 5"-10" long, lowest one longest; stamens shorter than 

 the petals ; stigmas 6-8. Canon City, Brandegee ; Greene. 



CEREUS CONOIDEUS, Eng. & Big. P. R. R., vol. 4, p. 35. Heads 

 3'-4' high, few from one base, of unequal height, ovate, acutish towards 

 the apex, conoid, 9-11 ribbed; radial spines 10-12, slender, rigid; upper 

 ones 2"-5" long, lateral ones 6"-15"; upper central spines hardly longer 

 than the lateral ones, lower one l'-3' long, angular and often compressed. 



Canon City, Brandegee. 



CEREUS PAUCISPINUS, Eng. Syn. 1. c., p. 29. Stem 5'-9' high, 

 2'-3' in diameter, ovate-cylindrical, sparingly branching or simple, 5-7 

 ribbed; areolae remote; spines strong, 9"-16" long, dark-colored, radial 

 3-6, central wanting or rare, stout, subangled. Canon City, Brandegee. 



OPUNTIA CAMANCHICA, Eng. & Big. Syn. I. c., p. 37. Large, 

 prostrate, extensively spreading, joints ascending, 6'-7' long, subor- 

 biculate ; pulvillre remote, numerous, armed ; set* straw-colored or 

 brownish, few ; spines 1-3, compressed, brownish, paler at the apex, 

 !J 7 -3' long, upper ones elongated, suberect, the others deflexed; berry 

 large, juicy, ovate, widely uinbilicate; seeds 2"-3" in diameter, angled, 

 deeply notched at the hilum. Canon City, Brandegee. 



OPUNTIA EAFINESQUII, Eug. Syn. 1. c., p. 39. Very variable. 



Gallon City, Brandegee. 



OPUNTIA MISSOURIENSIS, DC. Eng. Syn. 1. c., p. 43. Gray's Manual, 

 p. 185. Presenting a great variety of forms. Caiion City, Brandegee. 

 Foot-hills near Denver, Coulter. Colorado Springs, Porter. Frequent in 

 broad patches on the plains and in the mountains. 



OPUNTIA ARBORESCENS, Eng. Syn. 1. c., p. 51. Arborescent, 

 5-6 high, (but further south 10-20 or more;) branches numerous, 

 verticillate, horizontal, or pendulous ; joints verticillate, cylindrical ; 

 tubercles cristate, prominent ; spines 8-30, divaricately stellate ; berry 

 sub-hemispherical, tuberculate-cristate, yellow, unarmed; seeds regu- 

 lar. The woody portion of the stems, deprived of the parenchyma, is 

 often manufactured into canes. Abundant along the Arkansas east of 

 the mountains, Porter. Cation City, Brandegee. 



CUCURBITACEJE. 



CUCURBIT A PERENNIS, Gr. PL Lindh. Pt. 2, p. 193. Boot fleshy, very 

 large, 6'-3 thick, fusiform, yellow inside ; steins trailing on the ground ; 

 leaves strigose-canescent, cordate-ovate or triangular, narrowed above, 

 undivided or subsiuuate-repand, margin denticulate; lobes of the 

 calyx subulate, equal to the tube ; fruit globose, yellow, 2 / -3 / in diame- 

 ter. Plains and prairies east of the mountains, Porter. Xear Canon 

 City, Brandegee ; Redfield. 



ECHINOCYSTIS LOBATA, T. & G. Gray's Manual, p. 187. ]tfear Den- 

 ver, Dr. Smith. 



CICUTA MACULATA, L. Plains of the Platte, June, Coulter. 

 SIUM LINEARE, MX. Weston's Pass and White House Mountain at 

 11,000 feet altitude, Coulter. 

 4 F c 



