764 SCROPHULARIACEAE 



Corolla strongly ventricose-gibbous ; tube proper very 



short. VI. HALLIANI. 



Corolla not ventricose-gibbous; tube gradually dilated 



into a funnelform throat. VII. ACUMINATI. 



Plants glandular at least on the inflorescence. 



Stem-leaves distinctly petioled; blades broadly ovate or 



suborbicular, coarsely dentate. VIII. PETIOLATI. 

 Stem-leaves sessile or nearly so; blades linear to lanceo- 

 late or oblong. 



Stem glabrous below. IX. WIPPLEANI. 



Stem glandular or puberulent. X. CRISTATI. 



Corolla-tube almost cylindrical or slightly widening upwards; corolla 



less than 2 cm. long. 

 Stems several from a branching rootstock, low and weak. 



XI. HARBOURIANI. 

 Stems solitary or a few from a taproot or short caudex. 



XII. CONFERTT. 



Leaves linea.r-filiform. 



Corolla-limb not strongly oblique; sterile stamen bearded. 



XIII. LARICIFOLII. 

 Corolla-limb strongly oblique; sterile stamen glabrous. 



XIV. AMBIGUI. 

 Plant suffmticose at the base. XV. CAESPITOSI. 



Anthers dehiscent only on their proximate half, the distal half of the cells sac- 

 cate, remaining unopened. 



Plants densely glandular-pubescent throughout. XVI. GLANDULOSI. 



Plant glabrous or puberulent; if at all glandular only in the inflorescence. 



XVII. AZUREI. 

 Corolla red, almost tubular. 



Anthers opening nearly their whole length. 



Corolla scarcely bilabiate; lower lip not reflexed. XVIII. PUNICEI. 



Corolla strongly bilabiate; lower iip reflexed. XIX. BARBATI. 



Anthers opening only on their proximal part. XX. BRIDGESIANI. 



I. FRUTICOSI. 



Leaves more or less distinctly petioled, broadest at or above the middle, not long-acumin- 

 ate. 

 Leaf-blades obovate or oval, obtuse or the upper acutish. 



Plant 2-5 dm. high, erect. 1. P. fruticosus. 



Plant depressed, less than 2 cm. high. 



Corolla 3.5 cm. long; leaf-blades 1-3 cm. long. 2. P. ellipticus. 



Corolla 2.5-3 cm. long; leaf-blades 1 cm. long or less. 3. P. Menziesii. 

 Leaf-blades oblanceolate, all acute. 



Leaf-blades oblanceolate, entire or some rarely slightly denticulate; calyx-lobes 



lanceolate, 5-10 mm. long. 4. P. crnssifolius. 



Leaf-blades very narrowly oblanceolate, sharply dentate; calyx-lobes lance-subu- 

 late, 10-15 mm. long. 5. P. Scouleri. 

 Leaves sessile, long-attenuate, broadest at the base. 



Leaves glabrous; calyx 10-12 mm. long; corolla 3.5-4 cm. long. 6. P. Lyallii. 

 Leaves grayish-pilose; calyx 12-15 mm. long; corolla 2.5-3.5 cm. long. 



7. P. linearifolius. 



II. MONTANI. 



Leaves narrowly lanceolate; corolla 3.5-4 cm. long. 6. P. Lyallii. 



Leaf-blades ovate or cordate to broadly oblong; corolla about 3 cm. long. 



8. P. montanus. 



III. GLABRI. 



Anthers bearded, with long villous hairs; inflorescence secxind. 



Corolla-tube decidedly shorter than the throat; corolla deep blue. 



Calyx-lobes oval or ovate, acute 01 obtuse, glabrous. 9. P. strictus. 



Calyx-lobes lanceolate, long-acuminate, minutely puberulent. 



10. P. strictiformis. 



Corolla-tube nearly as long as the throat; corolla pale blue. 11. P. comarrhenus. 

 Anthers not long-villous. 



Anthers sparingly short-hirsute. 



Calyx-lobes ovate or lanceolate, acuminate. 

 Stem-leaves all lanceolate. 



Calyx-lobes with narrow scarious margins, not auriculate. 



Corolla about 1.5 cm. long; limb almost regular; tube slightly yentri- 



cose; plant usually puberulent. 12. P. Fremontii. 



Corolla 2 cm. long or longer; limb distinctly 2-lipped; plant glabrous. 

 Corolla about 2.5 cm. long; upper stem-leaves linear-lanceolate. 



13. P. subglaber. 

 Corolla about 2 cm. long; upper stem-leaves broadly lanceolate to 



ovate. 14. P. cyanocaulis. 



Calyx-lobes with very broad scarious margins, forming erose basal auricles. 



15. P. alpinus. 

 Stem-leaves broadly ovate or subcordate. 



Calyx-lobes with narrow or no scarious margins, not auriculate. 



