406 CALIFORNIA ACADEMY OF SCIENCES. 



186. Malacothrix squalida, Greene (see page 152). 



187. HiEKACiUM ARGUTUM, Niitt. Traiis. Am. Pliil. Soc. 

 yii. 447. — Common in bushy places at the north. 



188. Troximon heterophyllum, Greene, Bull. Torr. 

 Club. X. 88.— The typical form. 



189. SoNCHUS OLERACEUS, Linn. Sp. PI. 794. 



190. SoNCHUs ASPER, Fuchs. Hist. 674 (a. d. 1542). 



191. Specularia perfoljata, a. DC. Torr. Fl, N. Y. i. 

 428, t. 65. 



192. Vaccinium ovatum, Pursh. Fl. i. 290. — Pine woods 

 at the summit of the island, toward the west end. 



193. Arctostaphylos tomentosa, Dougl. Bot. Keg. t. 

 1791. — Forming low thickets near the summit, westward. 



194. Arctostaphylos pungens, HBK. Nov. Gen. & Spec, 

 iii. 278. — Abundant, but at lower altitudes than the preced- 

 ing. 



195. COMAROSTAPHYLIS THYEJXSiFOLix^Arctostaj^hi/los di- 

 versifoUa, Parry; Gray, Syn. Fl. Suppl. 397. — A handsome 

 small tree, 12 — 20 feet high, flowering in July, having the 

 external appearance, as well as the characteristic inflor- 

 escence of our northwestern arbutus, with no likeness at all 

 to the manzanitas; and, if fruit characters are of the value 

 attributed to them in these Ericaceaj generally, Comarosta- 

 phylis is a very good genus; otherwise this tree will be an 

 Arbutus, not an Arctostaphylos. 



196. DoDECATHEON Jeffreyi, Moore, Fl. des Serres. xvi. 

 99, t. 1662. — Hillsides of the interior; common. 



197. Samolus Valerandi, var. Americanus, Gray, Man. 

 ed. 2. 274. — Wet places, in deep gorges, under dripping 

 precipices, near the northern shores. 



