458 SOLANACEAE 



Range, Jcpson 19,774. Mohave Desert: Essex, Jepson 18,365; Lavie, Jepson. Cismontane S, 

 Cal. ; Santa Cruz Isl., Atrams 4' Wiggins 130; Los Sauces Creek, near Ventura, Jepson 20,170 

 Los Angeles, E. D. Pahner; San Bernardino, Parish; Horseshoe Bend, Orange Co., Jepson; 

 Eseondido, C. V. Meyer 225. Colorado Desert: Coachella, Clary 1553; Fort Yuma, Parisli 8334, 

 Eefs. — Datura meteloides DC, Prodr. 13':544 (1S52), "in calidis Novae Hispaniae regio 

 nibus," that is, Mexico; Jepson, Fl. W. Mid. Cal. 392 (1901), ed. 2, 367 (1911), Man. 887 (1925) 



2. D. discolor Bernh. Desert Thorn-apple. Plants low, 1 to ly^ feet high ; 

 herbage puberulent ; leaf-blades round-ovate, sinuately few-toothed or entire, 1 to 

 4V^ inches long ; corolla white with indigo flush in throat, 4 to 51/2 inches long, the 

 limb 11/2 to 1% inches broad, with 5 slender subulate teeth; anthers white; cap- 

 sule globose, nodding, its spines 5 to 7 lines long, glandular-puberulent, its collar 

 reflexed. 



Kiver flats and "bottoms" and about cienagas. 50 to 1000 feet : Colorado Desert. 

 East to Arizona, south to Mexico and Lower California. Sept. -Oct. 



Locs. — Picacho, Colorado River, Jepson 5292; Ft. Yuma, Parish; Dixie Laud, Parish 8336; 

 Mountain Springs grade (foot). Mum 11,948. 



Eefs. — Datura discolor Bernh., Linnaea, 8: Litt.-Ber. 138 (1833), "in India oecidentali"; 

 type loc. West Indies; Jepson, Man. 887 (1925). 



3. D. tatula L. Purple Thorn- Apple. Plants 1 to 3 feet high ; stems pui-- 

 plish; corolla purplish, 3 to 4 inches long, the limb l^/i to 2 inches wide; anthers 

 purple, 2 lines long; capsule ovoid, with mam^ very stout siibequal spines 1 to 2^/2 

 lines long. 



Naturalized from tropical America on sandy flats along creeks and rivers, 50 

 to 1000 feet : infrequent but widely distributed throughout cismontane California. 

 July-Sept. 



"Locs.— Yreka, Butler 1620; Bluff Creek, Klamath River, Tracy 6837; Dyerville, Humboldt 

 Co., Jepson 16,436; Coyote Valley, s. Lake Co., Jepson 19,060; Santa Rosa, Chesnut ; Fairfax, 

 Marin Co., Bioletti ; Carmel, Jepson; San Bernardino, Parish ("It is able to persist but not to 

 multiply."— Dec. 1, 1904). 



Refs. — Datura tatula L., Sp. PI. ed. 2, 256 (1762), type loc. not given; Jepson, Fl. W. Mid. 

 Cal. 392 (1901), ed. 2,367 (1911), Man. 887 (1925); Parish, Mulil. 5 : 127 (1909). 



Datura stramonium L., Sp. PI. 179 (1753), "habitat in America"; Safford, W. E., Jour. 

 Wash. Acad. Sci. 11:175 (1921); Jepson, Fl. W. Mid. Cal. 392 (1901), ed. 2, 367 (1911), Man. 

 887 (1925). Jamestown Weed. Plants % to 2 feet high, the stems greenish; corolla white, 3 

 inches long, its limb 1 to 1% inches wide; capsule ovoid, the lower spines V2 to 1 line long, the 

 upper ones 3 to 4 lines long. — Native of tropical America, adventive at a few scattered stations: 

 Elk Mt., n. Lake Co., Jepson 21,265 ; Santa Ana River near Newport Beach, L. M. Booth 1345. 



Datura ferox L., Amoen. Acad. 3:403 (1753), "habitat in China." Plants sparingly 

 branched, 12 to 14 inches high ; corolla 2 inches long ; capsular spines much dilated do-svnward, 

 the upper ones % to 1 inch long. — Introduced from Asia, adventive at a few scattered stations : 

 Lathrop, San Joaquin Co. ; Stockton ; lone, Amador Co. 



5. LYCIUM. L. Desert Thorn 



Shrubs, ours rough-spiny. Leaves small, entire, usually narrow, commonly with 

 smaller ones fascicled in the axils. Flowers pediceled, solitary or fascicled in the 

 axils or terminal. Calyx 5 (or 4) -toothed or -lobed, persistent beneath the globular 

 or oblong berry. Corolla tubulai'-funnelform to narrow-campanulate, with 5 (or 

 4) lobes, white, pale violet, purplish or lavender. Stamens 5 (or 4). Ovary-cells 

 2 to many-ovuled (1-ovuled in L. californicum) . Berry 2 to manj'-seeded. — Species 

 about 90, all continents. (The country Lycia, in Asia Minor.) 



Ovary and fruit without sutures ; corolla wholly glabrous or glabrous with a hairy margin ; corolla- 

 lobes not revolute ; filaments hairy or pubescent at base, inserted low on the corolla-tube. 

 Corolla small (2 to 6 lines long), clavate-tubular with rotate limb, or tubular-funnelform, the 

 limb 1^4 to 5 lines broad; berry red. 

 Corolla-tube not exceeding calyx to 2 times as long. 



Calyx-lobes triangular or acute, % to Vx as long as calyx-tube. 



CoroUa-tube little or not at all exceeding calyx ; leaves thick and fleshy, often 

 much like a grain of wheat in shape; herbage glabrous; S. Cal. coast 

 line 1. L. californicum. 



