122 SELECTED WESTERN FLORA 



2. P. sericea, (Graham) Gray. 



Stem 4-12 in. high from a branching rootstock, leafy to the top; leaves 

 pinnately parted into numerous narrow lobes, these being sometimes further 

 pinnatifid, the upper nearly sessile; flowers violet-blue or white on short 

 spikes, crowded in a close panicle. S. Alta. and Rocky Mts. north to Bow 

 River. 



LXXVII. SCROPHULARlACE.ffi (Figwort Family). 



Herbs -with exstipulate leaves and perfect, complete, but irregular 

 flowers. Calyx inferior, persistent, 4 or 5-cleft; corolla gamopetalous, 

 2-lipped, or, in some cases, almost regular; stamens 2-5, didynamous 

 or equal; fruit usually a many-seeded capsule. 



i. LINARIA. Toadflax. 



Calyx 5-parted; corolla 2-lipped, spurred at 

 the base on the lower side ; stamens 4, didyna^ 

 mous; capsule thin-walled. Herbs with alter- 

 nate upper leaves and showy flowers. 



1. L. vulgaris, Hill. Btjtter and Eggs. 



Erect, glabrous, leafy; leaves pale, linear; flowers 

 Fig. 73. — Linaria yellow, showy, in a dense raceme. Introduced to 

 vulgaris. ggj^e extent. 



2. PENTSTEMON. Beard-tongue. 



Calyx 5-parted; coroUa tubular, expanding above, 2-lipped, the 

 upper lip 2-lobed, the lower 3-lobed; stamens 4 fertile, and 1 sterile, 

 which is usually bearded down one side; fruit a many-seeded cap- 

 sule. Perennial herbs with opposite entire leaves and showy 

 flowers. 



1. P. gracilis, Nutt. 



Stem erect or slightly bent at the base, 6-15 in. high, minutely pubescent ; 

 stem leaves linear to lanceolate, sessile, more or less toothed; root leaves 

 oblong to spatulate, obtuse, tapering into a petiole; corolla purple, open at 

 the throat, the sterile filament bearded for half its length; flower cluster 

 loose. Dry prairies, Man. -Alta. 



2. P. aibidus, Nutt. 



Stems rather stout, 6-10 in. high, clustered, several from a branched erect 

 rootstock, erect or reclining at the base, slightly pubescent; leaves oblong to 

 linear; calyx, viscid-pubescent; coroUa purple or whitish, dilated at the 



