COMPOSITAE. 403 



4. D. cuspidata Greene. Stems very slender and leaves scarcely exceeding 

 1 line; flowers few; lower lip of the corolla broadly trefoil-shaped, broader 

 than long; lobes broadly ovate, retuse or somewhat obcordate, cuspidately 

 pointed, the terminal half violet, the lower portion white; undivided part of 

 lower lip yellow, plane or nearly so, that is, without protuberances or folds; 

 lobes of the upper lip 1% lines long, spatulate-obovate, cuspidately acute, 

 slightly divergent, deep violet; anther-tube scarcely exserted from the com- 

 paratively long (iy. 2 lines) and narrow corolla-tube. — (Bolelia cuspidata 

 Greene.) 



North Coast Eanges: Los Guilicos and Napa valleys. May- June. 



5. D. ornatissima Greene. Erect, slender, 2 to 6 in. high, simple or 

 branched from the base; tube of corolla raised into a protuberance at base 

 of upper lip, the segments of which are coiled backward into a ring; basal 

 portion of lower lip with 4 short folds, the center white with greenish yellow 

 spots, the lobes blue, all the colors very pale; stamen-column exserted beyond 

 the tube. — (Bolelia ornatissima Greene.) 



Plains of the lower Sacramento in Solano Co. May. This is doubtless 

 a reduced form of D. bicornuta Gray while the next is a still further re- 

 duction. 



6. D. humilis Greene. Very dwarf, 1 in. high; calyx-segments unequal; 

 corolla minute, white, 1 line long, obscurely bilabiate, the ovate-oblong acute 

 segments not very unlike. — (Bolelia humilis Greene.) 



Sonoma Co. 



2. HOWELLIA Gray. 



Either aquatic or of muddy margins of pools. Flowers more or less cleistog- 

 amous. Calyx-tube united for its whole length to the ovary, the limb with 

 slender segments. Corolla not surpassing the calyx, its very short tube di- 

 vided nearly to the base on the (apparently) upper side; lobes oblong, nearly 

 equal, three united higher. Ovary 1-celled, the filiform parietal placentae 

 each with 3 to 5 ovules. Capsule membranaceous, bursting irregularly on one 

 side. (Thos. Howell of Portland, author of a pioneer flora of Oregon, Wash- 

 ington and Idaho.) 



1. H. limosa Greene. Weak and procumbent, the branches 1 ft. long, 

 sometimes matted; leaves lanceolate, sessile, entire, 1 in. long; flowers cleistog-- 

 amous; capsule clavate-oblong, % in. long, crowned by the 5 triangular 

 calyx-teeth. 



Muddy shores: Suisun. May. This may be simply a terrestrial form of H. 

 aquatilis Gray. 



COMPOSITAE. Sunflower Family. 



Annual or perennial herbs or shrubs with alternate or opposite leaves. 

 Flowers perfect, unisexual or sterile, in heads, borne on the enlarged summit 

 of the peduncle (receptacle) and surrounded by the bracts of the involucre. 

 Receptacle with bracts subtending the flowers, or with bristles among the 

 flowers, or without bracts or bristles (naked). Corollas tubular and 5-toothed 

 or -lobed, or the limb strap-shaped (or ligulate) and toothed at apex, those 

 of a head all tubular or all ligulate or of both kinds. When both kinds are 

 present the flowers with the ligulate corollas occupy the margin of the head 

 and are called ray-flowers, and the ligulate corollas, rays; the flowers with the 

 tubular corollas occupy the center and are called disk-flowers. Ray-flowers 

 commonly pistillate, sometimes perfect or neutral; disk-flowers commonly 



