84 MADRONO [Vol. 1, 



10. A. nevadensis Gray is a low species, analogous to Ceano- 

 thus prostratus Benth. in the Rhamnaceae, though not as complete- 

 ly prostrate, but growing like it on the floors of the open pine woods. 

 Its main stems, prostrate and rooting, are x /i to 2 feet long and bear 

 ascending or erect branchlets 3 to 4 inches high or up to 6 or 9 

 inches high. It occurs in the high North Coast Ranges and in the 

 Sierra Nevada but is rare south of Mariposa Co. 



Locs. — Sierra Nevada: Summit, Nevada Co., Jepson; Tahoe, 

 Katharine Chandler; Mt. Tallac, Jepson 8136; Bierstadt Peak, Davy 

 3181; McClure Fork, Merced River, Jepson 3223; Glacier Pt., 

 Jepson 5678; Bald Mt., Fresno Co., Hall & Chandler 414; Mt. 

 Moses, Purpus 1369. North Coast Ranges: Hull Mt., W. W. 

 Mackie; Soldiers Ridge, ne. Mendocino Co., Jepson; South Fork 

 Mt., Humboldt Co., Chestnut & Drew; Trinity Summit, Jepson 

 2047; Marble Mt., Chandler 1598; Mt. Shasta, Jepson. 



Ref. — Arctostaphylos nevadensis Gray, Syn. Fl. 2:27 (1878), 

 type loc. Sierra Nevada, 8,000 to 10,000 ft. 



11. A. hookeri Don is a small coast species, that is very 

 weakly represented, occurring from San Francisco Co. to San Luis 

 Obispo Co. It was the first species of this genus to be described 

 from California, at least with California definitely indicated as the 

 place of origin. The type specimens were collected by Lay & Collie 

 at Monterey and are now in the National Herbarium, British 

 Museum. They seem to me representative of the natural type. 



Locs. — San Francisco, Kellogg; Pajaro Hills, Chandler 430; 

 Carmel, Jepson 2615, 2616. 



Refs. — Arctostapylos hookeri Don, Gen. Syst. 3:386 (1832), 

 type loc. Monterey, Lay & Collie. A . franciscana Eastw. Bull. Torr. 

 Club, 32:201 (1905), type loc. Laurel Hill, San Francisco, Eastwood. 



12. A. uva-ursi Spreng. is a boreal species which extends south 

 along the Pacific Coast and occurs in California along the north 

 coast, growing in the sand-dunes of Mendocino and Humboldt 

 Counties. 



Locs. — Gaulala, Brandt; Fort Bragg, W. C. Mathews; Samoa, 

 Humboldt Co., Davy 6184. 



Refs. — Arctostaphylos uva-ursi Spreng. Syst. 2:287 (1825). 

 Arbutus uva-ursi L. Sp. PI. 395 (1753), type locs. n. Europe and 

 Canada. 



Var. coactilis Fern, and McBr. Rhod. 16:212 (1914), 

 type loc. Brunswick, Me., Chamberlain; this variety is attributed 

 to California but the characters seem too indefinite as applied to 

 our north coast specimens. 



13. A. pumila Nutt. is a local species on the sand-dunes and 

 mesas of Monterey Bay. It has much the habit of A. nevadensis, 

 that is, it is low, about 4 to 8 inches high, and forms rough mats a 

 few feet across. 



Locs. — Monterey, Jepson 5702; Del Monte Heights, F. G. 

 Woodcock; Seaside, F. G. Woodcock. 



