162 MISC. PUBLICATION 303, U. 8S. DEPT. OF AGRICULTURE 
Lycium halimifolium Mill. Matrimony-vine. 
L. vulgare (Ait.) Dunal. 
Range: 2, 4, 9, 18, 14, 15, 16, 22, 28, 24, 25, 27, 28, 29, 30. 
Site: Dry, well-drained, sun, shade. 
Fruit: Berry, available August—May. 
A vine or small to large shrub; sparingly branched, spreading to recumbent ; 
spiny or unarmed; introduced and more or less naturalized from Hurope in 
the regions indicated; in the west sometimes considered a weed. 
Lycium hassei, see Lycium richit. 
Lycium macrodon Gray. 
Range: 10, 11. 
Site: Dry, sun. 
Fruit: Berry, available March—May. 
A small to large, much-branched, spreading, spiny shrub; flowers in February. 
Lycium pallidum Miers. Pale desert-thorn. 
Range: 9, 10, 11, 18, 14. 
Site: Dry, sun. 
Fruit: Berry, available July—August. 
A small to large, widespreading, thorny shrub; flowers April-May; occurs 
in sandy and other soils; sprouts readily when cut or broken down; often 
forms thickets. 
Locally important and valuable as browse for livestock, especially on winter 
range. 
Lycium palmeri, see Lycium richii. 
Lycium parishii Gray. Parish desert-thora. 
Range: 16. 
Site: Dry, sun. 
Fruit: Berry. 
A small to large, much-branched, short-spined, rigid shrub. 
Lycium parviflorum, see Lycium berlandieri. 
Lycium pringlei, see Lycium richii. 
Lycium puberulum Gray. 
Range: 11, 17%. 
Site: Dry, sun. 
Fruit: Berry, available in June. 
A small, spiny, sparingly branched shrub. 
Lycium quadrifidum, see Lycium carolinianum. 
Lycium richii Gray. 
LL, palmeri Gray, L. pringlet Gray. 
Range: 5, 10. 
Site: Dry, sun. 
Fruit: Berry. 
A small to large, spiny shrub; erect or somewhat clambering ; much branched ; 
sometimes forms dense thickets; tolerant of saline conditions; drought re- 
sistant; tolerant of poor soil. 
Var. hassei (Greene) Johnst., (LZ. hassei Greene) occurs in region 5 and is 
almost unarmed. The species called £. verrucosum Hastw. of the San Nicholas 
Islands is considered a freak originating from this species. It grows in eroded 
arroyos. 
Lycium spencerae, see Prunus fasciculata. 
Lycium torreyi Gray. Squaw desert-thorn. 
Range: 9, 10, 11, 16, 17. 
Site: Dry, well-drained, moist, sun. 
Fruit: Berry, available June—September. 
A small to large thorny shrub; flowers March—June; much branched and 
spreading; with heavy spines or unarmed. 
Lycium verrucosum, see Lycium richii. 
Lycium vulgare, see Lycium halimifolium. 
