362 BOTANY. 



Oenothera micrantha, Hornem. — Santa Barbara, I. c. p. 226. 

 Boisduvalia densiflora, Watson. — Head of Peru Creek, at 5,100 

 feet altitude (235), I. c. p. 233. 



LOASE^. 



Mentzelia gracilenta, T. & Gr. — Head of Peru Creek, at 5,100 feet 

 altitude (15, 222), I c. p. 236. 



Mentzelia kevicaulis, T. & Gr. — Walker's Basin, at an altitude of 

 3,440 feet (281), I. c p. 237. 



DATTSCE^. 

 Datisca glomerata, Benth. & Hook. — Ojai Creek (174), I. c. p. 242. 

 CACTE^E. 



Opuntia Engelmanni, Salm, var.? littoralis, Engelm. Fl. Cal. 1, p. 

 248.— Erect, spreading (2-4 feet high), with large oval joints (6-12 inches 

 long), bearing rather distant branches with a few rather slender, spiny, large, 

 yellow flowers, and large, obovate, juicy, purple fruit, with very numerous 

 small seeds. — Santa Cruz Island (10), and along the coast of Southern 

 California. 



FICOIDE^E. 



Mesembryanthemum crystallinum, L. — Islands and seashore near 

 Santa Barbara (8), I. c. p. 251. 



UMBELLIFER^. 



Carum Gairdneri, Benth. & Hook. — Southern Sierras, at 7,500- 

 10,000 feet altitude (32, 370, 384), I. c. p. 259. 



Berula angustifolia, Koch. — San Luis Valley, Colorado, in hot 

 springs the temperature of which is 80° Fahrenheit, and in spring water 

 at Fort Tejon, California, where the water has a temperature of 62° Fah- 

 renheit. In neither of these locations was there much of a yearly varia- 

 tion in temperature of the water, yet in one instance, as in the other, the 

 plant grew luxuriantly; the difference in temperature of the water at the 

 two places being 18° Fahrenheit (732, 262); I. c. p. 260. See page 133 of 

 this volume. 



