826 FLORA. 



and capitate at the summit; capsule acute, 1.5-2 cm. high, three times as long as 

 the calyx. On prairies. 111. to Minn., S. Dak. and Kans. June-Aug. 



12. Pentstemon acuminatus Dougl. SHARP-LEAVED BEARD-TONGUE. (I. 

 F. f. 3257.) Glaucous, strict, 1.5-6 dm. high, leafy. Leaves firm, entire, the 

 lower and basal ones oblong or spatulate, narrowed into petioles, the upper sessile 

 or clasping, lanceolate or ovate-lanceolate, 5-8 cm. long; thyrsus narrow, some- 

 times i-sided; calyx-segments lanceolate, acute, 4-6 cm. loiv*; corolla blue, its tube 

 rather gradually dilated, the limb 2-lipped; sterile filament bearded along the 

 dilated summit; capsule acute, twice as long as the calyx. In dry soil, N.W. Terr, 

 to Neb., Tex., Ore. and N. Mex. May- Aug. 



13. Pentstemon glaber Pursh. LARGE SMOOTH BEARD-TONGUE. (I. F. f. 

 3258.) Somewhat glaucous, leafy, 3-6 dm. high. Leaves entire, firm, the basal 

 and lower ones narrowed into petioles, the upper oblong or oblong-lanceolate, 

 acuminate; thyrsus narrow, elongated; pedicels 6-14 mm. long in fruit; calyx- 

 segments ovate -lanceolate, scarious margined, abruptly acuminate, 6-8 mm. long; 

 corolla blue or purple, rather abruptly expanded above the calyx, the limb some- 

 what 2-lipped, the lobes rounded; sterile filament bearded at the slightly enlarged 

 summit; capsule narrowly ovoid, acute, about twice as long as the calyx. In 

 moist soil, S. Dak. to Neb., Ariz., Ore. and Cal. May-Aug. 



14. Pentstemon angustifolius Pursh. PALE-BLUEBEARD-TONGUE. (I. F. f. 

 3259.) Glaucous; stem slender, leafy, 1.5-4 dm. high. Leaves linear, or linear- 

 lanceolate, entire, the lower narrowed into petioles, obtusish, the upper sessile, 

 acute, 3-6.5 cm. long, 3-4 mm. wide; thyrsus narrow, spike-like, mostly dense; 

 bracts lanceolate, acuminate; pedicels very short; calyx-segments linear-lanceolate, 

 acuminate, 4-6 mm. long; corolla blue or nearly white, the tube gradually en- 

 larged, the limb somewhat 2-lipped; sterile filament bearded at the summit. In 

 dry soil, Neb. to N. Dak. and Mont. May-July. 



15. Pentstemon Haydeni S. Wats. HAYDEN'S BEARD-TONGUE. (I. F. f. 

 3260.) Not glaucous or slightly so; stem decumbent, leafy, 3-6 dm. high. Leaves 

 linear or elongated-lanceolate, entire, sessile and slightly clasping, acute, acumi- 

 nate, or the lowest obtusish. 5-13 cm. long, 2-10 mm. wide; thyrsus narrow, dense; 

 bracts ovate or ovate-lanceolate, large, cordate-clasping, acute, or acuminate; calyx- 

 segments lanceolate, striate-nerved, acuminate, 6-10 mm. long; corolla blue, the 

 tube broadly dilated above the calyx, the limb nearly equally 5 -lobed; capsule acute, 

 twice as long as the calyx. In moist soil, Neb., Kans. and Wyo. 



9. COLLINSIA Nutt. 



Winter-annual herbs, with opposite or verticillate leaves, and blue, pink, white 

 or variegated flowers, verticillate, or solitary in the axils. Calyx campanulate, 

 5-cleft. Corolla irregular, the tube short, the limb 2-lipped; upper lip 2-cleft, the 

 lobes erect or recurved; lower lip larger, 3-lobed, the lateral lobes spreading or 

 drooping, flat, the middle one conduplicate, keel-like, enclosing the 4 declined 

 stamens and the filiform style. Stamens didynamous. Corolla with a gland on 

 the upper side of the tube near the base. Filaments filiform; anther-sacs conflu- 

 ent at the apex. Stigma small, capitate or 2-lobed. Capsule ovoid or globose, 

 septicidally 2-valved, the valves 2-cleft. Seeds few, large, peltate concave on the 

 inner side. [Named for Zaccheus Collins, botanist, of Philadelphia, 1764-1831.] 

 About 15 species, of N. Am. 



Corolla 10-16 mm. long, the throat shorter than the limb. 



Leaves, at least the lower, ovate or oblong; corolla-lobes notched, i. C. verna. 



Leaves lanceolate; corolla-lobes obcordate. 2. C, violacea. 



Corolla 4-6 mm. long, the throat longer than the limb. 3. C. parviflora. 



I. Collinsia verna Nutt. BLUE-EYED MARY. (I. F. f. 3261.) Glabrous or 

 puberulent; stem weak, 1.5-6 dm. long. Leaves thin, opposite, the lower broadly 

 ovate or orbicular, obtuse, crenate or entire, slender-petioled ; middle leaves sessile 

 or cordate-clasping, ovate or oblong, obtuse, dentate, 2-5 cm. long, floral leaves 

 ovate to spatulate, mostly acute; upper whorls 4-6-flowered; corolla 12-16 mm. 

 long, its lower lip blue, the upper purple or nearly white; capsule globose, 5-6 mm. 

 in diameter. In moist woods and thickets, western N. Y. and Ont. to Wis., Penn., 

 Ky. and the Ind. Terr. April-June. 



