244 GENTIANACE^l. (GENTIAN FAMILY.) 



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

 eastward to New York and Canada. 



H- -- 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-linear, or the uppermost narrowly 

 linear and connate at base : corolla bright blue, 1 to l 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-fiowered. 



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

 lowest spatulate : calyx deeply 5- Cor 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 : 

 seta; 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- spatulate : calyx 5-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 inch or more long. 



Var. acuta, Hook. f. Calyx almost 5-parted : crou-n 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 clef I: corolla ichitish, 

 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 white cartilaginous or scarious margins : flowers 



solitary and terminal : calyx narrow, 4 to 5-toolhed : corolla salverform when 



