8 BOTANY. 



SiNAPis ARVENSis, Linti. San Buenaventura ranch ; February. Found also by Kev. A. 

 Fitch. Probably introduced from Europe. 



SiNAPis NIGRA, Linn. Tulare valley ; February. This also is an introduced species. 

 Lepimum nitidum, Nutt. in Torr. & Gray, Fl. 1, p. 116. Santa Clara valley; February. 

 Lepidium montanum, Nutt. I. c. Sauz valley, and Playa de los Pimas ; July, The specimens 

 show a decidedly annual root. 



DiTHYRAEA WiSLizENi, Engclm. in Wislizen, N. Mex. p. 95 ; Torr. in Sitgreave's 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 Wisliz. N. 31ex. 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. Mag. 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. d Gray, Fl. 1, p. 141. Santa Clara to Los Angeles ; March. 

 As stated in Whipple's Eeport, this species, V. pra3morsa, Dougl., V. lingutefolia, Nutt., and 

 V. Nuttallii, Pursh, should, perhaps, be united. 



SiLENE Californica, Durand. in Jour. Acad. Philad. (n. ser.) 2, p. 83. S. pulchra, Torr. <& 

 Gray, Fl. l,p. 675, (in i^art.) San Diego; May. 



Talinum aurantiacum, Engelm. in PI. Lindh. 2, p. 54 ; Gray, PI. Wright. 2, p. 20. On San 

 Pedro river, tributary of the Gila ; July. 



Talinum aurantiacum, var. angustissimum. Gray, PI. Wright. 1, p. 14, and 2, p. 20. Burro 

 mountains ; August. 



Calandrinia Menziesii, Hook. Fl. Bor.-Amer. p. 223 t. 70. Los Angeles ; March. 



Clattonia perfoliata, Donn ; Bot. Mag. t. 1336; Torr. & Gray, Fl. 1, p. 200 and 676. 

 Los Angeles ; March. The typical form of the species. 



SiDALCEA malv^flora. Gray, PI. Wright. 1, p. 16. S. Neo-Mexicana, Gray, PI. Fendl. p. 

 23. Rio Mimbres ; August. 



SiDALCEA HUJiiLis, Gray, PI. Fendl. p. 20. Santa Clara to San Diego ; February to April. 



Malvastrum coccineum. Gray, PI. Fendl. p. 24. On the Gila river ; June. 



Sphaeralcbaincana, Torr. in Gray, PI. Fendl. p. 23 ; Gray, PI. Wright. 1, p.21. With the last. 



Sphaeralcea incana, var. dissecta, Gray, I. c. Chiricahui mountains. 



Sphaeralcea angustifolia, /S^ac/i, var. foliis lanceolatis inferioribus nunc hastato-subtrilobatis. 

 Gray, PI. Wright. 2, p. 21. San Pedro of the Gila ; July. 



Sphaeralcea Fendleri, Gray, PI. Wright. 1, p. 21. On the Gila river ; July. 



Hibiscus denudatus, Benth. var. involucellatus. Gray, PI. Wright. 1, p. 22. Puerto del 

 Dado ; July. 



Erodium cicutarium, Herit.; Torr. & Gray, Fl. \, p. 208. Tulare valley and Kikal 

 Mungo ; March. 



Erodium MoscHATUM, Willd.; DC. Prodr. 1, p. 647. Los Angeles ; March. Probably intro- 

 duced from Europe ; but De Candolle states that it grows in Peru. 



LiNUM perenne, imi.; Torr. & Gray, Fl. l,p. 204. Valley of Los Playas, New Mexico; 

 August. 



