108 DRUPACEJE. 



yellow- flowered form, possibly distinct (L. Menziesii, Agh.) occurs in 

 Napa Valley and near Antioch, and has sometimes been confused with 

 the next. April, May. 



23. L. lut col us, Kell. More slender, simple below, loosely branching 

 above, 2 ft. high or more, rigid, not succulent: racemes shorter and more 

 dense; bracts linear-setaceous: fl. rather small for the group (6 lines 

 long), pale yellow, subsessile: upper lip of calyx ovate-lanceolate, entire; 

 lower 3-toothed. A mountain species, from Contra Costa and Sonoma 

 counties; otherwise northern. June Sept. 



17. XYLOTHERMIA, Greene. A rigid much branched spinescent 

 shrub, with small nearly sessile 1 3-foliolate exstipulate leaves, and 

 large solitary almost sessile purple flowers. Calyx campanulate, repandly 

 4-toothed. Petals equal; banner orbicular, the sides reflexed; keel- 

 petals oblong, obtuse, distinct. Stamens distinct. Pod linear, com- 

 pressed, straight, several-seeded. 



1. X. montana (Nutt.), Greene. Shrub 3 6 ft. high, the branches 

 spreading widely: leaves crowded; leaflets %% in. long, oblanceolate, 

 acute, entire, somewhat silky when young: fl. near the ends of the stiff 

 spinescent branchlets, on short 2-bracteolate peduncles, from pale rose- 

 to deep red-purple, about % in. long. At middle elevations in the Coast 

 Range; often forming dense thickets on hill-sides and summits. 



18. THERMOPSIS, Robert Brown (FALSE LUPINE). Erect perennials 

 with palmately 3-foliolate leaves, foliaceous stipules, and a terminal 

 raceme of yellow flowers; the pedicels subtended by persistent bracts. 

 Calyx campanulate, cleft to the middle, the two upper teeth often united. 

 Banner roundish, shorter than the wings, the sides reflexed; keel nearly 

 straight, obtuse, equalling the wings. Stamens distinct. Pod linear, 

 flat, several-seeded. 



1. T. Californica, Wats. Stipules broadly lanceolate, less than 1 

 in. long; leaflets obovate or oblanceolate, 1 2 in. long, silky-tomentose 

 on both faces : pod 6 8-seeded. Var. velutina, Greene. Silvery-canes- 

 cent with a dense velvety pubescence; leaflets more acute. Type common 

 on low hills toward the coast; the variety on Mt. Hamilton. May. 



OBDEB XXXIV. DRUPACE>. 



Shrubs or trees with bark exuding gum; bark, leaves and seeds more 

 or less keenly bitter. Leaves alternate, simple, with small caducous 

 stipules. Flowers perfect (except in Osmaronia}, regular. Calyx tubular 

 or campanulate, free from the ovary, the tube lined with a disk, decid- 

 uous; limb 5-lobed, imbricate in aestivation. Petals 5, perigynous. 

 Stamens about 20, inserted within the petals on the disk of the calyx- 



