SCROPHULARIACEJE. (FIGWORT FAMILY.) 275 



5. P. strictUS, Beiith. Glabrous, or minutely pruinose, more or less glau- 

 cous : stem slender, 6 to 20 inches high : radical leaves from oval to spatulate ; 

 cauline narrowly lanceolate or linear ; floral reduced to small subulate bracts 

 of the elongated narrow and loose thyrsus: sepals ovate or oval, obtuse: corolla 

 about an inch long; the throat strongly ampliate: anthers either thickly or 

 sparsely comose with very long flexuous hairs : sterile filament naked or with 

 some similar slender hairs. Mountains of W. Wyoming to S. W. Utah. 



6. P. glaber, Pursh. Glaucous or glaucescent and very glabrous : stems a 

 foot or two high : leaves mostly oblong-lanceolate or the upper ovate-lanceo- 

 late : thyrsus elongated and many-flowered : sepals from orbicular-ovate and 

 merely acute to ovate-lanceolate or strongly acuminate from a broadish base : 

 corolla 1 to l inches long, the throat ampliate: anthers from glabrous to 

 sparsely hirsute. From Nebraska and Dakota to Colorado, Arizona, and 

 west to Oregon and California. 



Var. alpinus, Gray. A span high : cauline leaves from narrowly to 

 broadly lanceolate : thyrsus shortened and few-flowered. Alpine regions 

 from the Yellowstone to Pike's Peak. 



Var. cyananthus, Gray. Usually tall: leaves all broad; the cauline 

 ovate or subcordate and ovate-lanceolate : thyrsus dense : sepals much acumi- 

 nate or narrow : anthers and sterile filament from hirsute to nearly glabrous. 

 Proc. Am. Acad. vi. 60. P. cyananthus, Hook. Wyoming and Colorado 

 to the Wahsatch in Utah. 



* # * * Anthers dehiscent from base to apex and confluent, glabrous, explanate 



after dehiscence : herbs or rarely suffrutescent at base. 



- Glabrous throughout even to pedicels and calyx : leaves all entire, from linear 

 to ovate, glaucous or pale : stems simple and erect : thyrsus virgate or con- 

 tracted: corolla less than an inch long. 



w- Corolla abruptly campanulate-injlated, rather strongly bilabiate. 



7. P. secundiflorus, Benth. Afoot or two high, including the elongated 

 and racemiform strict many-Jlowered thyrsus : cauline leaves narrowly lanceo- 

 late ; radical spatulate : peduncles 1 to 3-flowered : sepals ovate or oblong, 

 with somewhat scarious but entire margins: corolla with narrow proper tube 

 nearly twice the length of the calyx: sterile filament glabrous or minutely 

 bearded at the dilated tip. Mountains of Colorado. 



8. P. Hallii, Gray. Resembling the last, but lower: leaves thickish, 

 linear and linear-spatulate : thyrsus short and more spiciform, 5 to 15-jlowered, 

 obscurely viscid : sepals broadly ovate and with widely scarious erose margins : 

 corolla with thickish and inconspicuous proper tube shorter than the calyx : sterile 

 filament short-bearded from apex downward. Proc. Am. Acad. vi. 71. 

 Mountains of Colorado, at 10,000 to 12,000 feet. 



-. ++ Tube of corolla gradually and moderately dilated into thefunnelform 

 throat ; lobes obscurely bilabiate. 



9. P. aCUminatUS, Dougl. Glaucous, 6 to 20 inches high, generally 

 stout and rigid, leafy : leaves coriaceous ; radical and lowest cauline obovate or 

 oblong ; upper cauline from lanceolate to broadly ovate, or the upper cordate-clasp- 

 ing, these mostly acute or acuminate : thyrsus strict, interrupted, leafy below, 

 naked above : sepals ovate and acute or lanceolate : corolla lilac or changing 



