BOTANY. 13 



mucronate ; those of the branches shorter and more distant ; all perfectly Bmooth. Stem and 

 older branches whitish. We believe that this interesting plant has not been found before, since 

 it was discovered in California by Coulter. — (Tab. VI.) 



Tessakia borealis, Torr. & Gray ; Gray PI. FencU. p. 75 ; Torr. in Sitxjr. Hep. p. 162, t. 5. 

 On the Colorado, Gila, &c. ; June. The stems of this plant are used by the Indians for making 

 their arrows. 



Baccharis cffiRULESCENs, DC. Frodr. 5, p. 402. On the Gila river, &c.; June. 



Baccharis DouGLASir, FC; Torr. (& Gray, Fl. 2, p. 259. San Bernardino ; March. 



Baccharis consanguinea, FC; Torr. cfc Gray, Fl. 2, p. 259. Near San Jose, and banks of 

 the Salinas ; November. Some of the specimens liave mature fertile heads, which we had not 

 seen before. The branches often bear gall-like excrescences, similar to those occurring on B. 

 pilularis, to which this species is, perhaps, too nearly allied. 



Zinxia pumila. Gray, PL Fendl. p. 81, (adnot.) tt PL Wright, 1, p. 105. Sauz valley ; 

 August. A stout and much-branched form, 6 to 8 inches high. Another dwarf variety, with 

 longer leaves and shorter rays than usual, was found on the Chiricahui mountains and on the 

 B. Mimbres. 



Hymenoclea Salsola, Torr. in Smithson. Contrib. [PI. Fremont) p. 14, t. 8. San Felipe. This, 

 I fear, is only a monstrous state of H. monogyra. 



Helianthos petiolaris, Nutt.; Torr. & Gray, 2, p. 309. On the Salinas river, and near 

 Los Angelos. 



XiMENESiA ENCELI0IDE8, Cavau.; Torr. & Gray, FL 2, p. 359. Gila river, &c.; rather com- 

 mon ; June. 



Heliomeris. — San Bernardino, San Gabriel, &c. ; February. 



Encelta Californica^ Nutt. in Trans. Arner. Phil. Soc. (a. ser.) 7, p. 357. Santa Inez 

 Mission ; December. 



RiDDELLiA tagetina, Nutt. I. c; Torr. c6 Gray, FL 2, p. 362. Burro and Chiricahui moun- 

 tains ; August. 



Gaillardia pulchella, Foucj.; Torr. & Gray, Fl. 2, p. 366. Los Playas ; August. 



Chenactis tenuifolia, Nutt.; Torr. & Gray, Fl. 2, p. 370. San Diego ; May. Much stouter 

 than Niittall's original specimens, and more than two feet high. 



Hymenopappus flavbscens, Gray, PL Fendl. p. 97; & PL Wright, 1, p. 121. Burro moun- 

 tains ; August. 



Bahia confertiflora, DC; Torr. & Gray, Fl. 2, p. 374. Near San Diego, and on the 

 Salinas river ; December, April. 



Burrielia tenerrima, do.; Torr. & Gray, Fl. 2, p. 385. On the Salinas river ; November, 



AcTiNELLA linearifolia, Torr. & Gray, Fl. 2, p. 383. Gray, PL Wright. I, 20. 122, and 2. 

 p. 96. Along the Gila river ; June. 



Latia elegans, Nutt.; Torr. & Gray, Fl. 2, p. 394. Kikal Mungo, California ; March. 



Layia glandulosa. Hook, and Am. Bot. Beechey, p. 358. Near Los Angelos ; March. 



Layia platyphylla. Gray, PL Fendl. p. 103 (adnot.) Callichroa platyphylla, Fisch. & 

 Mey.; Torr. (& Gray, Fl. 2, p. 395. Santa Clara to Los Angelos ; March. 



Hemizonia rudis, Benth. Bot. Suljjhur, p. 31. San Jose valley ; November. Fremont col- 

 lected the same plant in California in his expedition of 1845-'47. The root is decidedly annual 

 in Dr. Antisell's specimens. 



Baileya multiradiata, Harv. & Gray, in Emory's Rep. p. 144, t. 6, <£• in PL Fendl. p. 

 106, Gray, PL Wright. \,p. 123. Sauz valley ; August. 



