Vol. in.] 



FIGWORT FAMILY. 



155 



13. Pentstemon angustifolius 



Pursh. Pale-blue Beard-tongue. 



(Fig- 3259-) 



Pentslemon angustifoHa Pursh, Fl. Am. Sept. 



738. 181 4. 

 Penlstemon coeruleiis Nutt. Gen. 2: 52. 1818. 



Glabrous and glaucous; stem slender, 

 erect, leafy, 6'-l5' liigli. Leaves all linear, 

 or linear-lanceolate, entire, the lower nar- 

 rowed into petioles, obtusish at the apex, the 

 upper sessile, acute, i yi' -2}i' \on%, iyi"-2" 

 wide; thyrsus narrow, spike-like, mostly 

 dense; bracts lanceolate, acuminate; pedi- 

 cels very short; calyx-segments linear-lan- 

 ceolate, acuminate, 1"-}," long; corolla 

 blue, or nearly white, S"-io" long, the 

 tube gradually enlarged, the limb some- 

 what 2-lipped; sterile filament bearded at 

 the summit. 



In drj- soil, western Nebraska to North 

 Dakota and Montana, May-July. 



14. Pentstemon Haydeni S. Wats. 



Haj'den's Beard-tongue. 



(Fig. 3260.) 



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

 1891. 



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, \"-^" wide; thyrsus nar- 

 row, dense; bracts ovate or ovate-lanceolate, 

 large, cordate-clasping, acute, or acuminate; 

 fruiting pedicels 2"-^" long; calyx-segments 

 lanceolate, striate-nerved, acuminate, 2>"~S" 

 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. //. 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-clcft. 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 oblongr; corolla-lobes notched. i. C. verna. 



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



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



