GENTIANACE.E. (GENTIAN FAMILY.) 245 



expanded; the lobes or plaits in the sinuses broad and emarginate: anthers 

 cordate. 



7. G. humilis, Stev. Stems single or numerous, 1 to 5 inches long, 

 erect or ascending: leaves glaucescent and broadly white-margined; the radical 

 orbicular or ovate and rosulate ; cauline linear-oblong, erect, connate-sheathing, 

 2 or 3 lines long : corolla whitish or dull-colored ; its tube little exceeding the 

 calyx ; the limb J inch in diameter : capsule clavate-obovate, at length exserted 

 on a long and stout stipe much beyond the flower. — Grassy banks in the moun- 

 tains from Colorado to Wyoming. 



8. G. prostrata, Hsenke. Stems weaker than in the preceding, and when 

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

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

 linear-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. 

 *- Dwarf, 1 to 3-flowered: cauline leaves only 2 to 4 pairs. 



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

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

 tube obconical : corolla funnelform, l£ inches long, yellowish white or tinged 

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

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

 regions of Colorado, Utah, and northward. 



*- h- 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 5-flowered cluster : corolla blue, 1 to 

 1 J inches long ; the lobes broadly ovate, and the appendages at the sinuses 2-cleft 

 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 upper hardly 

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

 monly solitary flowe- • calyx-lobes ovate or oblong, or even subcordate, about the 

 length of the tube : corolla oblong-funnelform, its appendages in the sinuses 

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

 Montana, Wyoming, and northward. 



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

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

 sheathing base ; the involucrate uppermost 2 or 3 concealing the calyx and some- 

 times almost equalling the corolla of the 1 to 5 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 subalpine 

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



„_ h_ +. Stems rather taller, many-leaved : flowers not involucrate : the laciniate- 

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

 ling the lobes. 



12. G. afflnis, 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 : calyx- 



