222 ROSACEAE 



(1876), type loc. San Diego, Nuttall; Jepson, Man. 503 (1925), A. brevifolia Nutt.; T. & G. 

 Fl. 1:430' (1840). A. fasciculatum var. hirsutum C. K. Schn. Handb. Laubh. 1:533 (1905). 

 A. laxinn Gandg., I.e., type loc. San Diego, Brandcgce 1642. 



2. A. sparsifoliiim Torr. Ribbon Wood. Yerba del Pasmo. Shrub of tliiu 

 and slender habit, 10 to 15 feet hij^h; old bark red, shredding off freely in tliiu 

 sheets; foliage-bearing branehlets clustered at the end of the branches; branchlets 

 and leaves glandular-dotted; leaves alternate, linear, 3 to 5 lines long; stipules 

 none; bracts scarious, exceeding the obscurely ribbed calyx; stamens shorter than 

 the elliptic petals; ovary truncate. 



Mountain slopes and mesas, 2500 to 6000 feet : Santa Barbara Co. to San Diego 

 Co. South to Lower California. July-Aug. Also called Red Shanks. 



Locs. — Cuyama Valley, ace. Ralph Hoffmann; Tepesquet Creek, Santa Barbara Co., Wies- 

 lander; Topango Canon, Santa Monica Mts. (Dav. & Mox. Fl. S. Cal. 179) ; Chalk Hill, San 

 Jacinto Mt., Jepson 2284; Hemet, Riverside Co., B. Moses; Palomar Mt., J. P. Harrington; Hot 

 Springs Mt., San Diego Co., Jepson; Cuyamaca Mts., Palmer; Campo, n. of, on Buckraan Sprs. 

 road, s. San Diego Co., J. T. Howell 2978 ; Pine Valley, San Diego, Orcutt. 



Refs. — Adenostoma sparsifolium Torr.; Emory, Notes Mil. Rec. 140 (1848), type loc. 

 "Cordilleras of California" (that is, mts. of eastern San Diego Co.), Emory; Jepson, Man. 503 

 (1925). 



22. COLEOGYNE Torr. 



Widely, densely, and intricately branched spinescent shrub. Leaves opposite, 

 small, entire, coriaceous. Flowers solitary, terminal on short branchlets and sub- 

 tended by 1 or 2 pairs of 3-lobed bracts. Calyx-tube almost none. Calyx-lobes 4, 

 large, yellowish within, persistent. Petals none. Stamens 20 to 40, inserted 

 externally upon the lower part of a tubular sheath or torus which encloses the 

 ovary. Pistil 1 ; style lateral, conspicuously and densely villous at base, twisted, 

 exserted, persistent. Fruit a coriaceous glabrous achene. — Species 1. (Greek 

 koleos, sheath, scabbard, and gune, ovary.) 



1. C. ramosissima Torr. Black Bush. One to 5 feet high; branches op- 

 posite; leaves fascicled or approximate, thick, linear-oblanceolate, canescent, 2 to 

 4 lines long; stipules short-lanceolate or subtriangular, persistent after leaf fall; 

 calyx-lobes 4 lines long, the two outer ovate to lanceolate, acute, the two inner 

 broader, ovate or obovate, abruptly short-mucronate; torus membranous, dilated 

 below, 5-toothed at apex, as long as the calyx, glabrous outside, densely villous 

 within. 



Sandy or gravelly slopes in desert ranges, 1000 to 4500 feet : western Colorado 

 Desert; eastern Mohave Desert; Inyo Co. East to Colorado. Apr.-Aug. 



Locs. — Colorado Desert, west side: San Felipe Valley, e. San Diego Co., Jepson 12,446; 

 Morongo Valley, J. T. Howell 2891 ; White Tanks, w. of Pinto Basin, n. Colorado Desert, Jepson 

 12,623. Mohave Desert: Cushenbury Sprs., Parish 1268; Ord Mt., Jepson 5869; Granite Wells, 

 ace. Peirson; Kessler Peai, Ivanpah Mts., Jepson 15,834. Inyo Co.: Emigrant Canon, Panamint 

 Range, Jepson 7123. 



Refs. — CoLEOGYNE RAMOSISSIMA Torr. PI. Frem. 8, pi. 4 (1853), "sources of the Mohave and 

 Virgin Rivers, * * * in the mountains of Southern California," Fremont; Jepson, Man. 504, fig. 

 501 (1925). 



23. PURSHIA DC. 



Shrubs. Leaves mostly fascicled, the blades cuneate, 3-toothed or -lobed, with 

 revolute margins. Flowers solitary, terminal on the short branches. Petals 

 clawed, exceeding the calyx-lobes, pale yellow or white. Stamens 18 to 25, in one 

 row. Pistil 1. Fruit a coriaceous oblong pubescent achene, exserted and attenuate 

 into the persistent style. — Species 2, western North America. (F. T. Pursh, 1774- 

 1820, author of the Flora Americae Septentrionalis.) 



