SCROPHULARIACEAE (FIGWORT FAMILY) 449 



sterile filament flattened toward the apex, glabrous. In the Uintah moun- 

 tains of Wyoming, the Wasatch of Utah, and the Humboldt of Nevada. 



48. Pentstemon sepalulus A. Nels. Erect, slender, and paniculately slen- 

 der branched above, 3-8 dm. high, very pale and glaucous throughout: leaves 

 lanceolate to linear, narrowed toward the base, entire: peduncles 1-2-flowered: 

 sepals remarkably small, ovate, mucronate: corolla violet-blue, 3-4 cm. long, 

 the expanded limb broad: anthers as in the preceding; sterile filament glabrous. 

 (P. azureus ambiguus Gray, Syn. Fl. 2: 272. 1886; P. heterophyllus Wats. 

 Bot. King's Exp. 222. 1871.) In the mountains of northwestern Colorado, 

 in adjacent Utah and Wyoming. 



6. CHIONOPHILA Benth. 



A high-alpine dwarf perennial with entire leaves mostly in a radical tuft 

 and a dense spike of cream-colored flowers. Calyx funnelform. Corolla 

 tubular, with slightly dilated throat and bilabiate limb; upper lip erect, barely 

 2-lobed; lower with convex densely bearded base forming a palate, 3-lobed. 

 Anther cells divaricate and confluent. 



1. Chionophila Jamesii Benth. in DC. Prodr. 10: 331. 1846. Glabrous or 

 nearly so, 8-15 cm. high: leaves thickish, spatulate or lanceolate, tapering into 

 a scarious sheathing base; those on the scape-like flowering stems few, paired 

 or alternate, linear: spike few to many-flowered, mostly secund, bracteate: 

 corolla about 1 cm. long, pale cream-color or greenish- white : sterile filament 

 small and short. Alpine regions of the mountains of Colorado and southern 

 Wyoming. 



7. GRATIOLA L. HEDGE HYSSOP 



Soft-herbaceous and diffusely branching plants, from a creeping base. 

 Pedicels solitary and axillary, a pair of bractlets close to the calyx and equal- 

 ing it. Corolla-tube cylindraceous, with subequal lips; the upper entire or 

 lobed; the lower 3-cleft. Anther-bearing stamens 2; the anterior pair sterile- 

 rudimentary; anther cells distinct. 



1. Gratiola virginiana L. Sp. PL 17. 1753. Viscid-puberulent or pubescent, 

 often nearly glabrous below, divergently branched from the base, 1-2 dm. 

 high: leaves commonly glabrate, oblong-lanceolate, acute, entire to denticu- 

 late-serrate, mostly narrow at base: corolla 7-10 mm. long, with yellowish 

 tube and white limb, about twice as long as the calyx: anther-cells separated 

 by a broad connective: capsule ovoid. Wet soil; across the continent. 



, 8. SYNTHYRIS Benth. 



Perennial herbs with simple stems, mainly radical leaves, and rather small 

 purple, blue, or pink flowers in terminal spikes or racemes. Calyx 4-parted, 

 the segments oblong. Corolla oblong to short-campanulate, 4-cleft, more 

 or less irregular, rarely wanting. Stamens 2, exserted; filaments slender; 

 anther-cells parallel or somewhat divergent below, not confluent at the apex. 

 Style filiform, with small capitate stigma. Capsule compressed, obtuse or 

 emarginate. (Besseya Rydb.) 



Corolla wanting 1. S. wyomingensis. 



Corolla present. 



Leaves more or less divided. 



Leaves plnnatifid 2. S. pinnatifida. 



Leaves laciniately cleft to the middle or less . . . .3,8. laciniata. - 

 Leaves undivided. 

 Flowers erect. 



Corolla violet or purple. 



Leaves oval or subcordate . . . . . . 4. S. alpina. 



Leaves oblong 5. S. plantaginea. *- 



Corolla yellowish or white 6. S. Ritteriana. 



Flowers reflexed . . .- 7. S. reflexa. 



ROCKY MT. BOT. 29 



