Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean: Vol. 4, Pt. 3

BOTANY.
numerous clusters of bright-blue flowers, and resembling C. thyrsiflorus, only much smaller.
A trailing form, with more pubescent branches and leaves, and short-peduncled panicles, was
found at Duffield's ranch, Sierra Nevada, (May 12,) and at the Washington Mammoth grove,
(May 15.)
CEANOTHiUS DIVARICATUS, Nutt. in Torr. & Gray, Fl. 1. c. Yar.? GROSSE-SERRATUS: foliis majoribus, grosse-serratus, acutiusculis. Station not recorded. Branches thorny at the extremity;
serratures of the leaves acute; flowers blue.
CEANOTHUS INCANUS, Torr. & Gray, Fl. 1, p 265. A single specimen, of a slender form, of
this species exists in the collection. It is without a ticket, but was probably found in the valley
of the Sacramento.
CEANOTHUS CRASSIFOLIUS, (Torr. in Emory's Mex. Bound. Rep., cum tab. ined.:) fruticosus,
ramulis pubescentibus; foliis ovatis, integerrimis, vel remote spinuloso-denticulatis coriaceis
crassis penninerviis, supra demum glabratis subtus albo-tomentosis, thyrsis subsessilibus
umbelliformibus (floribus albis.) Hills and sandy plains, Cajon Pass, March 16; Teyung,
California, Mr. Wallace, 1854. Dr. Parry discovered this well-marked species in the mountains south of Los Angeles, while acting as botanist, under Major Emory, in the Mexican
boundary survey.
CEANOTHUS INTEGERRIMUS, Hook. & Arn. Bot. Beechey, p. 329; Torr. d& Gray, Fl. 1. c.;
Benth. P1. Hartw. p. 302, No. 1684. Grass valley, May 20; Los Angeles, May 14; hill-sides,
Nevada, May 20.
CEANOTHUS DIVARICATUS, Nutt. 1. o. var., EGLANDULOSUS: foliis integerrimis (margine nec denticulatis glanduliferis) obtusissimis. On mountains near San Gabriel; March 22. Also with
vestiges of last year's fruit. Cohon Pass, March 16. (Collected by Dr. Parry on the mountains
east of San Diego; in fruit and in flower by Mr. Wallace, at Boca de Teyunga, April.) This
has the flowers, the divaricate spinescent branches with whitish bark, and also the foliage of
C. divaricatus, except that none of the specimens show a trace of the glandular denticulations
so manifest in the specimens of Douglas and of Coulter; nor is the pubescence on their ribs
quite so evident. Some of the leaves are slightly cordate.-Gray, Mss.
CEANOTRUS CUNEATUS, Nutt. in Torr. & Gray, Fl. 1, p. 267. C. macrocarpus, Nutt. 1. c., (non
Cavan.) Cocomungo, March 17; San Giovana, April 12; Napa valley, April 27; Knight's
ferry, Stanislaus, May 7, (fruit.) A very variable species in the size and form of the leaves.
It should, perhaps, include C. verrucosus of Nuttall.
CEANOTHUS DENTATUS, Torr. & Gray, Fl. 1, p. 268; Lindl. & Paxt. Fl. Gard. 1, p. 17, t. 4.
Santa Rosa Laguna; May 1. This pretty species has much the appearance of C. sorediacus
but the leaves are hardly 3-nerved.
CEANOTHUS RIGIDUS, Nutt.,in Torr. & Gray, Fl. 1. c.; Lindl. & Paxt. Fl. Gard. 1, p.74, t. 51;
Bot. Mag. 78, t. 4664. Yar. GRANDIFOLIUS. Punta de los Reyes; April 18. The leaves are three
times larger than in the ordinary form of this species, and strongly spinose-toothed on the sides
as well as at the extremity. This variety seems to show almost a transition to C. prostratus,
through the broad-leaved form of that plant noticed below; but we are not willing to unite the
two species, without seeing a more extensive suite of specimens for comparison.
CEANOTHUS PROSTRATUS, Benth. 21). Hartw. p. 302. Grass valley, May 20; with immature
fruit. The leaves vary from oblanceolate and entire to cuneate and tricuspidate. The fruit is
crowned with 3 strong protuberances. A variety, with much larger obovate-cuneate leaves,
coarsely spinose-toothed down to the middle, or at the apex only, was found at the Washington
Mammoth grove. Colonel Fremont collected the same on the Upper Sacramento in 1846.
CEANOTHUS FENDLERI, Gray, lPl. Fendl. p. 20. Sandia mountains; Octobers In fruit.
MESEMBRYANTHEMACEIE.
MESEMBRYANTIHEMUM DIMIDIATUM, Harv.? Sea-shore, Punta de los Reyes, April 18. The plant
is abundant in several other places on the coast of California, and was probably introduced.
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