96 SCROPHULARIACEJE. 



7. SCROPHTTIiARIA, Tournefort. 

 JL S. Calif ornica, Chain. Stems square: flowers dull pnrple, 3-4 lines long. 



8. CHELONE, Linnaeus. 

 1. O. nemorosa, Dougl. Corolla violet-purple. In woods. Or., northward. 



9. PENTSTEMON, Mitchell. 



1. Anther-cells soon widely separating at base, united more or less completely at top, 

 splitting open nearly or quite the whole length. 



* Anthers densely woolly, becoming shield-shaped after shedding pollen 1 



* Anthers glabrous, splitting through the apex and spreading out', stems branching and 



shrubby, at least below: leaves leathery or parchment-like, mostly email, and short- 

 pelioled: filaments all hairy at base. 



Corolla scarlet, narrow-tubular, its upper lip erect and the lower more or less spreading: 

 sterile filament bearded down one side. 



Leaves subcordate or ovate acutely toothed, 1 in. long or less 2 



Leaves oblong or oval J to 2 in. long, often canescent 3 



Leaves slender, rigid, acutely toothed, glaucous 4 



Corolla yellow or yellowish, purple-tinged, not an inch long, the gaping limb longer than 

 the tube (except No. 7) : upper lip concave, lower recurved. 



Leaves lanceolate or oblong-lanceolate, denticulate 5 



Leaves similar, yellowish green, remotely serrate 6 



Leaves spatulate or oval, entire, G lines long or less '. 7 



** Anthers with spreading distinct cells splitting from base nearly to the top: corolla 

 scarcely bilabiate, blue or purple. 



Leaves mostly oblong-lanceolate, glaucous 8 



* * * * Anthers splitting open from base through the united apex. 

 Glaucous or pale and glabrous: 1 saves leathery or thick: corolla 9-12 lines long. 



Stems thick, 1 to 3 ft. high: leaves mostly ovate-lanceolate, entire 9 



Taller: leaves thinner; upper pairs acuminate, united, acutely dentate 10 



Similar but leaves thicker: corolla crimson, 9 lines long, throat narrow 11 



Leaves 1 to 4 in. long, the upper often united: corolla cream- white, pinkish. . 12 

 Corolla 8 lines long or less (more in 13): thyrsus viscid in 13, 14, 16, IS. 



Corolla somewhat bilabiate lower lip and sterile filament hairy. . . 13, 14, 15, 16 



Corolla funnelform or tubular: sterile filament nearly or quite naked 17, 18 



2. Anthers sagittate or horse-shoe shaped, the cells opening by a continuous cleft 

 around the apex which reaches about half way to the bases of the cells, these remain- 

 ing closed and saccate, sometimes hairy but never woolly: corolla some shade of 

 purple and blue, from rose purple to lavender (scarlet red in the last). 



* Soft-pubescent, viscid, stout: radical leaves 6-8 inches long 19 



