12. BOTANY. 
(ENOTHERA (CHYLISMA) BREVIPES, Gray in Torr. Bot. Whippl., p. 86. Common all along the 
Colorado in February and March. 
CENOTHERA (CHYLISMA) CLAvV@FoRMIs, Torr. in Frem. Rep. & Bot. Whippl.1. c. Common on 
gravel hills, &c., upper part of the Colorado, in February and March. 
CENOTHERA (SPHEROSTIGMA) GAURHFLORA, Torr. & Gray, Fl. 1, p.510. Riverside mountain, 
on Colorado. 
These specimens, like one of Schott’s from the Gila, are complete, and allow the cauline 
leaves, &c., to be described. The petals are pale yellow, tinged with pink outside. 
CinotHERA Dentata, Cav.; Torr. & Gray, Fl. 1, p. 510. Riverside mountain, on Colo- 
rado, January 28. 
CENOTHERA CHAMANERIOIDES, Gray, Pl. Wright. 2, p. 58. Fort Defiance, New Mexico ; 
May 23. Early; small specimens. ; ! 
(ENOTHERA CHEIRANTHIFOLIA, Horvem.; Torr. & Gray, l. c. San Diego, California; Novem- 
ber 10. 
ZAUSCHNERIA Catirornica, Presl. Rel. Hoenk. 2, t. 52. San Diego and San Luis Obispo; 
November. 
: LOASACE A. 
EvonipE BarToNtoweEs, Zuce.; Gray, Pl. Lindh. 2, p. 192. On ledges of rocks, head of 
Mojave valley. ‘‘ Sete irritating the skin like nettles.’’ 
MENTZELIA ALBICAULIS, Torr. & Gray, Fl. 1, p. 534. On gravelly surfaces, &c., along the 
Colorado. Common. Mojave valley; March 23. 
MENTZELIA (BARTONIA) LavicauLis, Torr. & Gray, l. c. Bartonia levicaulis, Dougl. in Hook. 
Fil., t. 69. Riverside mountain; January 25. 
CUCURBITACE A. 
Mecaruira Carirornica, Torr. in . Riverside mountain, and on the Colorado, 
to Black Cafion; March; in flower. 
CUCURBITA PERENNIS, Gray, Pl. Lind. 2, p- 193. On Colorado everywhere, and thence to 
Rio Grande. 
Cucursira picitata, Gray, Pl. Wright. 2, p. 60. Along Lower Colorado. 
CACTACEM. By Dr. Geo. Engelmann. 
MamitLaria Granamt, Engelm. in Mex. Bound. Rep. IT, p. 1, tab. 6, figs. 1-8; Synops. Cact. 
in Proc. Americ. Acad. Arts and Sciences, III, p.6. Common along the Colorado; in flower 
April 7; fruit of last year just ripe. In the M. B. Rep. the fruit is erroneously called a small 
oval berry, probably green. The specimens then at command had shrivelled and discolored 
fruit. Those now before me show that the berry is elongated, clavate, scarlet, three-quarters 
or even one inch long, with or without the remains of the flower. The seeds are absolutely 
the same as those of the El Paso plant. 
MAMILLARIA PHELLOSPERMA, Lnglm. 1. c., p. 6, t. 1; Syn. Cact. p. 6. Common with the last, 
and easily confounded with it by the casual observer; apparently more abundant westward, 
while the former prevails more eastWard; generally simple, sometimes many-headed. Some 
of Dr. Newberry’s specimens closely resemble the figure in M. B. R.; others have fewer, 
(30-35,) shorter, and stiffer spines, almost in three series, the 8-12 interior ones stout and 
purplish brown. One of the specimens before me has, in each bunch, three divergent, hooked, 
central spines. | : 
Ecuinocactus Wurpp.et, Engelm. & Bigelow in Pacif. R. R. Rep. IV, Cactacece of Lieut. 
Whipple's Exped., p. 28, t. 1; Syn. Cact., p. 15. In sandy soil on the Little Colorado, often 
half buried in sand, in the same region where Dr. Bigelow discovered this pretty species in 
_ 1853; in flower in the middle of May. ee 
