76 KEY TO THE SPECIES 



6. Pentstemon cristatus Nutt. (Crested Beard-tongue). Viscid and villous- 

 pubescent above, 1-2 dm. high ; the stem leafy ; leaves mostly oblong and acute ; 

 thyrsus dense and leafy; sepals narrow ; corolla light red or pinkish, funnel-form, 

 about 35 mm. long, long-bearded in the. throat and the sterile stamen inordinately 

 yellow comose. Caiions and plains. 



7. Pentstemon humilis Nutt. (EocKY Mountain Beard-tokgue). Glabrous 

 except the slender thyrsus, 1-2 dm. high ; stems tufted ; leaves largely basal, ob- 

 long to lanceolate, usually some of them denticulate ; inflorescence narrow, the 

 peduncles 2-5 flowered ; sepal* ovate-lanceolate ; corolla blue, narrowly funnel- 

 form, 12-15 mm. long; hairy on the lower lip; sterile filament yellow- bearded 

 at tip. Rocky caiions and slopes. 



+- +- Flowers in open or in capitate verticils. 



8. Pentstemon procerus Dougl. (Small-flowered Beard-tongue). Nearly 

 glabrous, some minute puberulenee in the inflorescence ; stems usually several, 

 ascending or erect, 15-25 cm. high ; leaves oblong-lanceolate to linear ; flowers in 

 1-3 capitate clusters ; sepals from ovate to lanceolate, with scarious margins and 

 more or less lacerate tips ; corolla small, nearly tubular, only 10-13 mm. long, 

 bearded within, purplish-blue. Frequent in moist grassy valleys. 



9. Pentstemon stenosepalus (Gray) Rydb. (Timberline Beard-tongue). 

 Viscid-pubescent above, stems tufted, ascending, 3-5 dm. high ; leaves thickish, 

 oblong to lanceolate ; flowers in 2-5 axillary cymes ; sepals lanceolate-acuminate ; 

 corolla dull white or purplish, gibbously dilated above the short tube, 2-3 cm. 

 long ; sterile fllament bearded at the tip. In the upper limit of trees. 



5. SCROPHULARIA (Figwort) 



Tall herbs with mostly opposite leaves, small greenish-purple or lurid flowers 

 In a loose terminal cluster, deeply 5-clef t cals'x, corolla with a somewhat globular 

 tube (4 upper lobes of the short border erect, the lower one spreading), and 4 de- 

 clined stamens. 



1. Scrophularia occidentalis (Rydb.) Bicknell (Western Figwort). Glan- 

 dular-pubescent above ; stem 4-sided, 5-10 dm. high ; leaves from ovate to lanceo- 

 late, sharply serrate ; corolla conspicuously gibbous. Wet banks. 



6. COLLINSIA 



Slender branching herbs with opposite leaves, small flowers in clusters in the 

 axils of the leaves, deeply 5-clef t calyx, deeply 2-lipped corolla saccate or bulging 

 at base, upper lip 2-cleft with lobes turned backward, and middle lobe of the 3-clef t 

 lower lip sac-like and inclosing the 4 declined stamens and style. 



1. Collinsia parviflora Dougl. (Small-flowered Collinsia). Obscurely 

 puberulent, branched from the base, the slender stems soon spreading, B-15 em. 

 long ; leaves linear-oblong ; calyx-lobes triangular-lanceolate, nearly equaling the 

 blue and white corolla. Rich loose soil, caiions and woods. 



7. MIMULUS (Monkey-flower) 



Herbs (in the species listed) growing in water or wet places, with opposite 

 leaves, showy yellow axillary flowers and 2-lipped corollas. 



1. Mimulus I/angsdorfli Sims (Marsh Monket-floweb). Nearl.v .glabrous, 

 from 1 or 2 to several dm. high, often coarse and succulent ; leaves ovate or ob- 

 long, from entire to dentate or even lyrate ; corolla deep-yellow, large, frequently 

 dark dotted and the lower lip blotched. Borders of rivulets and marshes. 



