220 



ROSACEAE 



Lake, San Mateo Co., C. F. Baler G91 ; Strawberry Cafion, Berkeley, Jepson 9633, 9793 ; Asa 

 Bean' KidfTO, ne. Z^fcndocino Co., Jepson ] 3,834; Fortuna, IIiini1)ol(it Co., Tracy 6638; Eureka, 

 Tracxi 47S0; Bald Mt., n. Iluml^oldt Co., Tracy Gl'.t5; Bip Lagoon, Humboldt Co., Tracy 6085; 

 Trinitv Summit, n. Humboldt Co., Jepson 2034. Siskiyou Co.: Cuddihy Valley, Jepson ; Salmon 

 Mt., Buthr 537; Shasta Sprs., Jcjjson 13,835; Niels Camp, Mt. Shasta, Jepson 13,836. Sierra 

 Nevada: North Fork Middle Tule Kivor, Jepson 4700 ; Lewis Camp, Kern Kiver Canon, Jepson 

 971; Atwell Mill, East Fork Kaweah Eiver, Jepson 1161; Millwood, 8. Fresno Co., Jepson 2773; 

 Bub'bs Creek, South Fork Kings Kiver, Jepson 798; near Kaiser Mdw., n. side Kaiser Pa.ss, 

 Jepson 16,087; Crane Flat, ]Maripo.sa Co., Jepson 10,435; Glacier Pt., Yosemite, Jepson; Straw- 

 berry, Tuolumne Co., Jepson 13,837; Cedar Creek, Tuolumne Co., A. L. Grant 364; Sonora Pass 

 road, Tuolumne Co., A. L. Grant 385; Squaw Peak, Placer Co., C. J. Fox; Emigrant Gap, 

 Nevada Co., Jepson 14,075; Mineral, Tehama Co., J. Grinnell ; upper Fall River valley, lava 

 fields ne. of, Jepson 5763; Fandango Pass, Modoc Co., Jepson 7837; Mt. Bidwell, Jepson 7859. 

 Rofs.— Prunus emarginata Walp. Eep. 2:9 (1843); Jepson, Fl. W. Mid. Cal. ed. 2, 211 

 (1911), Man. 506, fig. 504 (1925). Cerasiis emarginata Tfowft}.; Hook. Fl. Bor. Am. 1 :169 (1834), 

 type loc. "on upper part of the Columbia River, especially about Kettle Falls," T)ou(jlas; Jepson, 

 Fl. W. Mid. Cal. 285 (1901), C. glandulosa Kell. Proc. Cal. Acad. 1:59 (1855), type loc. Placer- 

 ville. C. californica Greene, Fl. Fr. 50 (1891), based on Coast Range shrubs (Humboldt Co., 

 Marshall). C. arida Greene, Proc. Biol. Soc. Wash. 18:57 (1905), e. base of San Bernardino Mts., 

 Parish. C. pruni folia Greene, I.e., mts. of Fresno Co., Eall 4" Chandler 385. C. rhamnoides 

 Greene, I.e. 58, Mud Sprs., Amador Co., Hansen 1474. C. kelloggiana Greene, I.e., mts. e. of Chico, 

 E. M. Austin. C. ohliqua Greene, I.e. 59, Oro- 

 ville, H. E. Brown. C. parvifoUa Greene, I.e., 

 8. side of Mt. Shasta, B. E. Brown. C. mollis 

 Dougl.; Hook. Fl. Bor. Am. 1:169 (1834), 

 "near the mouth of the Columbia," Douglas. 

 P. mollis Walp. Rep. 2:9 (1843). P. emarginata 

 var. mollis Brew.; B. & W. Bot. Cal. 1:167 

 (1876). P. emarginata var. villosa Sudw. U. S. 

 Div. For. Bull. 14:240 (1897). Cerasus erecta 

 Presl, Epim. Bot. 194 (1849), Nootka Sound, 

 Haenke. P. erectus Walp. Ann. 3:854 (1852- 

 53). Cerasus pattoniana Carr. Rev. Ilort. 135 

 (1872). P. emarginata erecta Piper; Piper & 

 Beattie, Fl. Nw. Coast 199 (1915). 



2. P. virginiana L. var. demissa 

 Torr. Western Ciioke-ciierry. (Fig. 

 170.) Erect slender deciduous shrub 2 

 to 10 feet high, or rarely a small tree 

 up to 20 feet high; leaf -blades oblong- 

 ovate or more commonly oblong-obovate, 

 acute or abruptly short-pointed, finely 

 serrate, 1 to 31/2 inches long; petioles 1/2 

 inch long, with 1 or 2 glands just below 

 their summits; racemes 2 to 4 inches 

 long, terminating more or less leafy pe- 

 duncles; flowers 3 to 6 lines wide; drupe 

 red or dark purple, 3i/^ lines long, as- 

 tringent. 



Mountain slopes, canons and creek 

 bottoms, 800 to 7500 feet : mountains of 

 Southern California; Coast Ranges; 

 Sierra Nevada. North to Washington. 

 Apr.-May. 



Note on variation. — Bushes from different 

 stations vary slightly as to pubescence on the 

 under side of the leaves. Specimens show 

 numerous gradations from leaves essentially 



glabrous to leaves with a few obscure hairs to those states which are scantily though obviously 

 pubescent. The pubescent form is possibly the more common, but throughout its range occur gla- 

 brous, subglabrous or very slightly pubescent forms all of which are in every other respect notably 



Fig. 170. Prunus virginiana L. var. de- 

 missa Torr. o, flowering branchlet, X 1; b, 

 fl., X 2 ; c, f r., X 1. 



