Vol. III.] 



FIGWORT FAMILY. 



155 



13. Pentstemon angustifolius 

 Pursh. Pale-blue Beard-tongue. 

 (Fig. 3259-) 



Pentstemon angustifolia Pursh, Fl. Am. Sept. 



738. 1814. 

 Pentstemon coeruteus Nutt. Gen. 2: 52. 1818. 



Glabrous and glaucous; stem slender, 

 erect, leafy, 6' '-15' high. Leaves all linear, 

 or linear-lanceolate, entire, the lower nar- 

 rowed into petioles, obtusish at the apex, the 

 upper sessile, acute, i^'-^^'long, i^ // -2 // 

 wide; thyrsus narrow, spike-like, mostly 

 dense; bracts lanceolate, acuminate; pedi- 

 cels very short; calyx-segments linear-lan- 

 ceolate, acuminate, 2 // ~3 // long; corolla 

 blue, or nearly white, S // -lo // long, the 

 tube gradually enlarged, the limb some- 

 what 2-lipped; "sterile filament bearded at 

 the summit. 



In dry soil, western Nebraska to North 

 Dakota and Montana. May-July. 



14. Pentstemon Haydeni S. Wats. 



Hayden's Beard-tongue. 



(Fig. 3260.) 



Pentstemon Haydeni S. Wats. Bot. Gaz. 16: 311. 



1 891. 



Glabrous, not at all glaucous or slightly so; 

 stem decumbent, simple or branched, leafy, 

 i-2 high. Leaves linear or elongated-lan- 

 ceolate, entire, sessile and slightly clasping, 

 acute, acuminate, or the lowest obtusish at the 

 apex, 2 / -5 / long, i // ~5 // wide; thyrsus nar- 

 row, dense; bracts ovate or ovate-lanceolate, 

 large, cordate-clasping, acute, or acuminate; 

 fruiting pedicels 2 // ~3 // long; calyx-segments 

 lanceolate, striate-nerved, acuminate, 3 // -5 // 

 long; corolla blue, i / long or more, the tube 

 broadly dilated above the calyx, the limb 

 nearly equally 5-lobed; capsule acute, twice 

 as long as the calyx. 



In moist soil, Nebraska, Kansas and Wyoming. 



9. COLLINSIA Nutt. Journ. Acad. Phil, i: 190. pi. 9. 1817. 



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

 gated 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 con- 

 duplicate, keel-like, enclosing the 4 declined stamens and the filiform style. Stamens didy- 

 namous. Corolla with a gland on the upper side of the tube near the base. Filiments fili- 

 form; anther-sacs confluent 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, natives of North America. 



Corolla 5"-8" long, the throat shorter than the limb. 



Leaves, at least the lower, ovate or oblong; corolla-lobes notched. 1. C. verna. 



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



Corolla 2"-3" long, the throat longer than the limb. 3- C. parviflora. 



