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. 7, Pt. 4

BOTANY.
SINAPIS ARVENSIS, Linn. San Buenaventura ranch; February. Found also by Rev. A.
Fitch. Probably introduced from Europe.
SINAPIS NIGRA, Linn. Tuiare valley; February. This also is an introduced species.
LEPIDIUM NITIDUTM, Nutt. in Torr. & Gray, Fl. 1, p. 116. Santa Clara valley; February.
LEPIDIUM MONTANUM, Nutt. 1. c. Sauz valley, and Playa de los Pimas; July. The specimens
show a decidedly annual root.
DITIIYRAEA WISLIZENI, Engelm. in Wislizen, AT. ex. p. 95; Torr. in Sitgreave', Bep. p.280,
t. 2. On the Gila river; June, in flower and fruit. Not observed before so far west. The
silicles, even when young, are frequently quite smooth; in other respects agreeing with the
character of the plant given by Dr. Engelmann, who has well contrasted this species with D.
Californica.
WISLIZENIA REFRACTA, Engelm. in WVsliz. N. Mex. p. 99; Gray, PI. Wright. 1, p. 11, t. 2.
On the Gila river. The leaves of these, and of other specimens from the same region, are
minutely scabrous.
ISOMERIS ARBOREA, Nutt. in Torr. & Gray, Fl. 1, p. 124; Bot. Nag. t. 3842. Santa Clara
valley and near San Diego; February-May. This interesting shrub is not found east of the
coast range.
VIOLA PEDUNCULATA, Torr. & Gray, Fl. 1, p. 141. Santa Clara to Los Angeles;March.
As stated in Whipple's Report, this species, V. premorsa, Dougl., V. linguvefolia, Nutt.,and
V. Nuttallii, Pursh, should, perhaps, be united.
SILENE CALIFORNICA, -Durand. in Jour. Acadc. Philad. (n;. 8er.) 2, p. 83. S. pulchra, Torr. &
Gray, Fl. 1, p. 675, (in part.) San Diego; May.
TALINUM AURANTIACUM, Engelm. in PI. Lindh. 2, p. 54; Gray, Pl. Wright. 2, p. 20. OnSan
Pedro river, tributary of the Gila; July.
TALINUM AURANTIACUM, var. ANGUSTISSIMUM, Gray, P1. Wright. 1, p.14, and 2, p. 20. Burro
mountains; August.
CALANDRINIA MENzIESII, Hook. Fl. Bor.-Amer. p. 223 t. 70. Los Angeles; March.
CLAYTONIA PERFOLIATA, Donn; Bot. Nag. t. 1336; Torr. & Gray, Fl. 1, p. 200 and 676.
Los Angeles; March. The typical form of the species.
SiDALcEA MALvrFLoRA, Gray, PI1. Wright. 1, p. 16. S. Neo-Mexicana, Gray, P1. Fendl. p.
23. Rio Mimbres; August.
SIDALCEA HUMILIS, Gray, PI1. Fendl. p. 20. Santa Clara to San Diego; February to April.
MALVASTRUM COCCINEUM, Gray, P1I. Fendl. p. 24. On the Gila river; June.
SPRAERALCEAINCANA, Torr. in Gray, P1. Fendl. p.23; Gray, P1. Wright. 1, p.21. Wihthelast.
SPRAERALCEA INCANA, var. DISSECTA, Gray, 1. c. Chiricahui mountains.
-SPRAERALCEA ANGUSTIFOLIA, S~paeh, var. foluis lanceolatis inferioribus nunc hastato-subtrilobatis,
Gray, P1. Wright. 2, p. 21. San Pedro of the Gila; July.
SPIAERALCEA FENDLERI, Gray, P1. Wright. 1, p. 21. On the Gila river; July.
HIBISCUs DENUDATUS, Benth. var. INVOLUCELLATUS, Gray, P1. Wright. 1, p. 22. Puerto del
Dado; July.
ERODIUM CICUTARIUM, Herit.; Torr. & Gray, Fl. 1, p. 208. Tulare valley and Kikal
Mungo; March.
ERODIUM MOSCRATUM, Willd.; DG. Prodr. 1, p. 647. Los Angeles; March. Probably introduced from Europe; but De Candolle states that it grows in Peru.
LINUM PERENNE, Linn.; Torr. & Gray, Fl. 1, p. 204. Valley of Los Playas, New Mexico;
August.
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