230 ROSACEAE 



Desert slopes and mesas, 3000 to 6500 feet : Moliavc ;iiul ("olorjulo deserts and 

 borderinp: ranjres; north to Inyo Co. East to Utah and Arizona. Apr.-May. 



Field note. — In 102S woll-devoloppd shrubs Avorc observed in the Pinto Basin on tlie nortli 

 borders of tlio Colorado Desert. One individual 10 feet high formed a rounded clump 22 feet 

 broad, its divaricate branches and branclilets making a remarkably close Aveavc on the periphery 

 of the croAvn. 



Locs. — Lone Pine, Tnj'o Co., Jepson 513G; Hanaupah Canon, Panamint Eange, Jepson 7059; 

 Telescope Peak, Panamint Range, Jepson 700G ; New York Mts., Jepson 5442 ; Ord Mt., Mohave 

 Desert, Jepson 58(55, 5924; Cameron sta., Tehachapi Mts., Jepson 15,876; Swartout Vallej', 

 San Gabriel Mts., Peirson; Cajon Pass, Peirson 1987 ; Cottonwood Spr., Cottonwood Mts., Jepson 

 12,579; Palm Canon of San Jacinto, Riverside Co., Jepson 1344. 



Var. punctata Jepson var. n. Young shoots very pubescent ; leaves glabrous, glandular- 

 punctate. — (Pulli pubescentissimi ; folia glabra, glanduloso-punctata.) — Sandy flats, 200 to 600 

 feet: northern Santa Barbara Co. (Bicknell sta., Jepson 12,669, type) to San Luis Obispo Co., 

 Ida Blochman. 



Refs. — Prunus FASCICULATA Gray, Proc. Am. Acad. 10:70 (1875); Jepson, Man. 507 (1925). 

 Emplectocladns fasciculatus Torr. PI. Frem. 10, pi. 5 (1853), type loc. "Sierra Nevada of Cali- 

 fornia, probably in the southern part of the range," Fremont. Amygdalus fasciculata Greene, 

 Fl, Fr. 49 (1891). Lycium spencerae Mcbr. Contrib. Gray Herb. 53:18 (1918), type loc. Cajon 

 Pass, Mary F. Spencer 366. Var. punctata Jepson. 



Prunus communis Arcangeli, Fl. Ital. 209 (1882). Amygdalus communis L. Sp. PI. 473 

 (1753), tj-pe loc. Mauretania. Almond. Tree 15 to 25 feet high; leaf -blades lanceolate, closely 

 serrate; flowers solitary, sessile; fruit with a dry flesh which separates from the thin stone. — 

 Native of Asia, much cultivated in California in the lowland valleys, the fruits disseminated by 

 blue-jays and flickers and the tree, thus, sometimes spontaneous: Vaca Valley; Berkeley. Feb. 



26. SORBUSL. 



Deciduous trees or shrubs. Leaves pinnate with many leaflets. Flowers white, 

 in compound cymes. Stamens about 20. Ovary inferior, 2 to 5-celled; styles as 

 many as the cells, distinct. Fruit a small berry-like pome. — Species about 9, north 

 temperate zone. (The ancient Latin name.) 



1. S. sitchensis Roem. Western Mountain Ash. Many-stemmed erect 

 nearly glabrous shrub 3 to 9 feet high ; leaves 4 to 6 inches long ; leaflets 5 to 7 pairs, 

 oblong, serrate except at base, 1 to 2 inches long; corymbs 2 to 3 inches broad; 

 petals 2 lines long; styles Adllous at base; fruit coral-red, 4 lines long. 



Along streams on steep slopes in the mountains, 7000 to 9000 feet : Sierra Ne- 

 vada from Tulare Co. to Modoc Co. North Coast Ranges from Humboldt Co. to 

 Siskiyou Co. North to Alaska, east to Labrador. July. 



Locs. — North Coast Ranges: Lasseck Peak, Humboldt Co., Goddard 694; Trinity Summit, 

 n. Humboldt Co., Tracy 5292; Salmon Summit, w. Siskiyou Co., Jepson 2075a; Etna Creek (head 

 of), Siskiyou Co., Butler 282. Sierra Nevada: Cliff Creek, Tulare Co., Culhertson 4674; Onion 

 Valley, Inyo Co., Jepson 895; Rancheria Creek, Huntington Lake, Fresno Co., A. L. Grant 1456; 

 Mt. Lyell, Jepson 3344 ; Benson Lake, Tuolumne Co., Jepson 4512 ; Kennedy Lake, Tuolumne Co., 

 A. L. Grant 515 ; Suzy Lake, Eldorado Co., Jepson 8182. Medicine Lake, e. Siskiyou Co., M. S. 

 Baker 471. 



Var. densa Jepson. Leaflets more crowded, 1^/4 to 2 inches long; corymbs denser, the pedicels 

 and calyx-tube hairy.— Montane, 3500 to 8700 feet: Mariposa Co. to Siskiyou Co. 



Locs. — Sierra Nevada: Stubblefield Canon, Tuolumne Co., Jepson 4530; Lovers Leap, Eldo- 

 rado Co., F. M. Anderson; Bear Valley, Nevada Co., Jepson 13,849; North Fork Bidwell Creek, 

 Warner Mts., Modoc Co., Jepson 7900. Siskiyou Co. : Sisson, Jepson 13,850 ; Woolly Creek, 

 Butler 281. 



Refs. — SoRBUS sitchensis Roem. Syn. Monog. Rosifl. 3:139 (1847), type from Sitka, 

 Mertens; Jepson, Man. 508, fig. 506 (1925). Pyrus occidentalis Wats. Proc. Am. Acad. 23:263 

 (1888), "mountains from Washington to California", E. Hall. S. occidentalis Greene, Fl. Fr. 

 54 (1891). S. californica Greene, Pitt. 4:131 (1900), "middle elevations in the Sierras." Pyrus 

 sitchensis var. calif ornicus Smiley, Univ. Cal. Publ. Bot. 9:233 (1921). S. americana var. sit- 

 chensis Sudw. U. S. Dept. Agr. Misc. Circ. 92:133 (1927). Var. densa Jepson, Man. 508 (1925), 

 type loc. Stubblefield Canon, Yosemite Park, Jepson 4530. Pirus samiticifolia B. & W. Bot. Cal. 

 1:189 (1876), not C. & S. (1827). 



