GENTIAN ACExE. (GENTIAN FAMILY.) •J4r> 



expanded; the lubes or plaits in the sinuses broad and emarginate: anthen 

 cordate. 



7. G. humilis, Stev. Stems single or numorous, I to 5 inclics long, 

 erect or ascending: leaves g/aucescent and broad! ij irhite-viarqined ; the radical 

 orbicular or o\'ate and rosiHate; cauline Unear-ohlong, errct, connate-shiathing, 

 2 or 3 Hues long: corolla u-hitish or dull-colored ; its tube little exceeding the 

 calyx ; the limb ^ inch iu diameter : capsule clavate-ohovatc, at Unqth eiserted 

 on a long and stout stipe much beijond the Jlourr. — (;rassy l»anks iu the moun- 

 taius from Colorado to Wyoming. 



8. G. prostrata, Heeuke. Stems weaker tlian iu the preceding, and \vh«'n 

 elongated the lateral ones often procumbent : leaves ovate, less erect, greener, and 

 less ichite-margined : flower 4-merous: corolla azure-blue, in fruit enclosing the 

 hnear-oblong rather short-stipitate capsule. — Alpine regions from Colorado 

 northward. 



* * Flowers comparatively/ large, mostly short-peduncled or sessile: anthers 

 linear or oblong: usually a pair of bracts under the flower. 

 •*- Divarf, 1 to S flowered: cauline leaves only 2 to A pairs. 



9. G. frigida, Hcenke. Stems 1 to 5 inches high: leaves linear, varying 

 to lanceolate or spatulate, thickish, the pairs connate-sheathing at base : calvx- 

 tube obconical : corolla funnelform, 1^ inches long, yellowish white or tinged 

 with blue, purplish-dotted ; the lobes short and broad ; the phiits entire and 

 broad but slightly extended at summit. — Including var. algida. Pall. Alpine 

 regions of Colorado, Utah, and nortliward. 



•*- -4- Low: stems several from the same caudex: cauline leaves 6 to 16 pairs, 

 more or less connate or even sheathing at base; the uppermost involucrate 

 around the sessile terminal flower or 3 to b flowered cluster: corolla blue, 1 to 

 1^ inches long ; the lobes broadly ovate, and the appendages at the sinuses 2-clefl 

 or lacerate. 



10. G. calycosa, Griseb. A span or more high : leaves ovate ; the low- 

 est pairs usually smaller and with connate-sheathing base, the uj)pcr liardly 

 so; the involucrate uppermost leaves somewhat exceeding the calyx of the com- 

 monly solitary flowe" • calyx-lobes ovate or oblonq, or even subcordate, aI>out the 

 length of the tube: corolla oblong-funnelform, its appendages in the sinuse.s 

 triangular-subulate, laciniate, or 2-rleft at the tip. — California and (Oregon to 

 Montana, Wyoming, and northward. 



11. G. Parryi, Engelm. A span or more high : leaves glaurescent, thick- 

 ish, ovate, varying to oblong-lanceolate, most of the pairs with a somewhat 

 sheathing base ; the involucrate xippermost 2 or Z concealing the calyx and some- 

 times almost equalling the corolla of the 1 to b flowers: lobes of the calyx short- 

 linear, more or less shorter than the tube: appendages at the sinuses of the corolla 

 narrow, deeply 2-cleft. — Trans. St. Louis Acad. ii. 218. Alpine and subalpino 

 regions of New Mexico, Colorado, Utah, and Nevada. 



4- 4_ H_ Stems rather taller, many-leaved : flowers not involucrat> .- the laciniate- 

 toothed or cleft appendages at the sinuses of the corolla sometimes almost equal- 

 ling the lobes. 



12. G. affinis, Griseb. Stems clustered, a span or more high : leaves 

 from oblong or lanceolate to linear: flowers from numerous and thyreoid- 

 racemose to few or rarely almost solitary: bracts lanceolate or linear: calyz- 



