414 SCROPHULARIACEiE. 



Herbage somewhat reddisli; galea purple. 



Corolla deep sulphur-yellow .8. 0. erianthus. 



Corolla white or rose-color : vars. of 8. 0. erianthus. 



Leaves broader, entire or with few segments; corolla-tube broader and 

 dilated upwards; herbage somewhat yellowish; corolla cream-color 

 throughout . . .9.0. lithospermoides. 



1. O. attenuatus Gray. Slender, strict or more rarely with a few 

 branches, 5 to 12 in. high; leaves linear-lanceolate, attenuate, entire 

 or the upper with one or two filiform lobes above the middle, 3 in. 

 long or less, mostly 1 line wide or less; spikes slender, loose below, 

 denser above; bracts with white tips or almost wholly herbaceous; 

 calyx-lobes' 4, filiform, the divisions of nearly equal depth; corolla 

 dull white, not deeply bilabiate, the lanceolate teeth of the upper lip 

 large for the size of the corolla, almost as long as the lower lip and 

 nearly equaling the galea; lower lip shallowly saccate, purple-dotted. 



Fields: Coast Ranges; Hacramento Valley; Sierra Foothills. Apr.- 

 May. 



2. O. castilieioiaes Benth. Coryrabosely branched from the 

 base, commonly 6 to 10 in. high, somewhat hirsute-pubescent; leaves 

 broader than in the preceding, 4 lines wide or less, entire or with 

 laciniate linear di\isi(ms; spikes shoit and dense, or even subcapitate, 

 the bracts with white or yellowish tips; calyx-segments linear; corolla 

 6 to 10 lines long, dull white with purple marks; galea plainly longer 

 than the bright crimson teeth. 



Marshy ground about San Francisco Bay (Alameda, West Berke- 

 ley) and northward to Napa Valley and Sonoma Co. June. 



3. O. densiflorus Benth. CoMMOiir Bscobita. Strict or strictly 

 branched, 5 to 15 in. high, finely pubescent; leaves oblong-lanceolate 

 to linear, with mainly a pair of filiform divisions; spike dense, 4 in. 

 long or less; bracts 3-cleft with purple and white tips; calyx-segments 

 spatulate dilated, purple; corolla 8 to 10 lines long, purple and white; 

 lower lip with large crimson dots, the teeth nearly as long as the 



Calistoga; San Rafael; Mill Valley; Newark, etc., and southward 

 along the coast to San Luis Obispo. May. 



4. O. purpurascens Benth. Pukple Escobita. Erect or fre- 

 quently much branched from the base with ascending branches, 4 to 

 15 in. high, villous-pubescent; leaves parted into many filiform 

 divisions; bracts palmately cleft and somewhat dilated, the upper 

 with crimson or purple tips, as also the calyx-lobes; corolla crimson 

 or purplish, 1 to 1| in. long; lower lip white-tipped, with yellow and 

 purple dots or markings; galea densely purple-bearded on the back, 

 incurved at tip. 



Sierra Foothills; Sacramento and San Joaquin Valleys; Napa Val- 

 ley; Antioch; Los Gatos; Monterey and southward to Southern Cal- 

 ifornia. Apr.-May 15. 



5. O. pusillus Benth. Slender and weak, 2 to 4 in. high; herbage 

 purplish, sparingly hispidulous-pubescent; leaves pinnately cleft into 

 linear or filiform divisions; bracts longer than the scattered incon- 

 spicuous dark red flowers; corolla 2 to 3 lines long. 



