APPENDIX 373 



Hibiscus denudatus. A shrub i or 2 feet high, with scanty gray- 

 green leaves and large, handsome flowers, white with dark 

 purple "eye." Blooms in late spring. 



Hoffmanseggia microphylla. A tall, loosely growing plant found 

 in dry desert caiions. Usually a number of the slender cane-like 

 stems grow in a clump together. Leaves twice compound, of 

 numerous minute leaflets: flowers yellow, in an open elongated 

 cluster. 



Hofmeisteria pluriseta. A small bushy plant growing in the crev- 

 ices of rocky cliffs, the stems slender but woody, and the leaf- 

 blades like a flattened tip on the leaf-stems. Flowers in small 

 heads, abundant but not showy. 



Hymenoclea salsola. Salt bush. A common, large, grayish bush 

 with small, narrow leaves. Flowers very small, greenish, in 

 profuse clusters at end of twigs. Blooms in late spring. 



Hyptis emoryi. Lippia. A tall bush of the lower mountain slopes, 

 up to 10 feet high, with rather straight stems usually branch- 

 ing from the ground. Leaves gray-green: flowers small, numer- 

 ous, lavender colored, in loose spikes. The leaves and blossoms 

 have a lavender-like smell. Blooms from mid-spring to au- 

 tumn. 



Isocoma acradenia. A small shrub with narrow, dark-green leaves 

 and small, yellow flowers; common and widely distributed. 

 Blooms in early spring. 



Isomeris arborea. Bladder-pod. A vigorous, ill-smelling shrub 4 

 to 8 feet high, with light-green, triply-divided leaves and clus- 

 ters of showy, yellow flowers. The seed-vessel is a large pale 

 green pod. Blooms from earliest to late spring. 



Krameria parvifolia. A common bush of the lower mountain 

 slopes, 2 feet or so high, with few, inconspicuous leaves and 

 purplish gray, much-interlaced stems and twigs. Flowers deep 

 claret color: seed-vessels small, round, prickly. Blooms in mid- 

 and late spring. 



Larrea glandulosa. Creosote bush. Greasewood: Span., Hedion- 

 dia. The commonest and most widely distributed shrub of the 

 desert, growing up to 12 feet high, in strong, somewhat brittle 

 stems diverging from the ground. The branches and twigs are 

 regularly marked with rings. Leaves small, glossy, bright dark 

 green, sticky, with strong tarry odor: flowers profuse, bright 



