244 GENTIANACE^. (gentian family.) 



Fries. From Nevada to Colorado, the Saskatchewan, and northward, thence 

 eastward to New York and Canada. 



■>- 4- Flower 2-bracteate under or near the calyx: filaments ciliate-bearded below 

 the middle : calyx hardly at all angled or carinate. 



3. G. barbellata, Engelm. Stems single or in pairs from the slender 

 fusiform root or caudex, 2 to 5 inches high : leaves rather thick and fleshy, 

 obtuse, with roughish callous margins ; the radical spatulate or slender-peti- 

 oled ; the 2 or 3 cauline pairs spatulate-liuear, or the uppermost narrowly- 

 linear and connate at base: corolla bright blue, 1 to 1 J inches long, twice the 

 length of the calyx ; the lobes oblong, erose-denticulate above, conspicuously 

 fringed along the middle : capsule not stipitate. — Trans. St. Louis Acad. ii. 

 216. Alpine region of the Colorado mountains. 



* # Flowers smaller, 4 to 5-merous : corolla somewhat funnelform or salverform 

 when expanded ; the lobes entire, their base mostly crowned with setaceous fila- 

 ments : capsule seldom stipitate. 



■*- Peduncles elongated and naked from a very short stem, one-flowered. 



4. G. tenella, Rottb. An inch to a span high : leaves oblong or the 

 lowest spatulate : calyx deeply 5- (or 4-) parted : corolla 2£ to 4 lines long, 

 double the length of the calyx, blue ; its lobes ovate-oblong, rather obtuse, 

 little shorter than the tube : fimbriate crown conspicuous at the throat. — 

 High alpine regions in Colorado and northward to the arctic regions. 



*- +- Peduncles short or none, terminal and lateral on a comparatively elongated 



stem. 



5. G. heterosepala, Engelm. A span or two high, racemosely few- 

 flowered : leaves ovate-lanceolate or oblong : calyx very unequally 5-parted ; 

 two of the lobes large and foliaceous, ovate, acute, equalling the tube of the pale 

 blue corolla (4 to 6 lines long) ; the other three linear-subulate and shorter : 

 setce of the crown copious, united below into a membrane on the base of each 

 corolla lobe. — Trans. St. Louis Acad. ii. 215. In the mountains of New 

 Mexico, Colorado, and Utah. 



6. G. Amarella, L. From 2 to 20 inches high : leaves from lanceolate 

 to narrowly oblong, or the lowest obovate-spatnlate : calyx b-cleft below the 

 middle ; the lobes lanceolate or linear, equal or one or two of them longer, all 

 shorter than the mostly blue corolla, which is J inch or more long. 



Var. acuta, Hook. f. Calyx almost 5-parted : crown usually of fewer and 

 sometimes very few setce. — G. Amarella of the Western Reports. Throughout 

 British America and southward along the mountains to New Mexico and 

 California. 



Var. stricta, Watson. Stem (sometimes 2 to 4 feet high) and branches 

 strict, remotely leafy : leaves thickish, the cauline lanceolate-linear : flowers 

 numerous, commonly 4-merous, smaller: calyx less deeply cleft: corolla whitish, 

 little longer than the unequal calyx ; seta; of the crown sometimes very few or even 

 wanting. — Bot. King's Exped. 278. 



§ 2. Corolla plicate at the sinuses, the plaits more or less extended into thin-mem- 

 branaceous teeth or lobes : no crown nor glands. — Pneumonanthe. 



♦ Dwarf: leaves small and with whin- cartilaginous or scarious margins: flowers 



solitary and terminal : calyx narrow, 4 to 5-toothed : corolla sjalverforvi when 



