GENTIANACEAB (GENTIAN fAMlih) '381 



Flowers smaller (less than 3 cm. long); corolla-lobes never fringed, ' ' 



■ ■ Flowers solitary on a long' terminal 'peduncle . . '. '. '■'&. G.'monantha. 

 Flowers few-many. i; ,,,., ; ■• 



Sepals very unequal, two of thenL foliaceous and ov^lapping , 



the others . . .""'." . V . . ' ' .4, G. heterosiepala. 

 Sepals somewhat unequal but nolle' foliaceOusl ■■' ' r 



Flowers very numerous,' in! a. < spike-like . thyrse, short- ^ 



• pediceled; leaves generally, as, long as the internodes . 5., G. strictiflora. 



Flowers fewer, often long-pediceled; some of the internodes ^ ' 



much exceeding the leaves. ' . . . ! v . . 6. G. plebeja. 

 Perennials; corolla plicate at ,the sinuse&t,. .the folds more or. .le^ ex- , i 

 tended into tliin teeth or lp)3es, 

 Anthers distinct, ' 



Corolla open-campanulate or funnelform, the lobes spreading; 



the subtending, leaves broad. , • ' ' i -l'''' «ii' ' i 



Flowers always yellowish but freely spattered with purplish- 



brown spots; the basal leaves persistent . , ' ^ ' . ' 7. G. Rbtilanz'ovii. 

 Flowers blue or blue-purple, or rarely ochroleucous, the basal •• ■ 



leaves deciduous. . . , 



. Flowers solitary 8. G. calycosa. 



Flowers 1-5 ' . . ; 9. G. Pariyi.> 



Corolla funnelform, its lobes but slightly divergent; the subtend- ' i i: 



ing leaves narrow,. . 

 Reaves oblong-lanceolate to ovat^. 



Calyx-lobes present ' ,''■..' '. , . . . . 10.' G. affinis. 

 ■ Calyx-lobes wanting or minute and irregular '. '. 'i 11. G. Forwoodii. 



Upper leaves linear to lance-linear 12. G. Bigeloyii^ . 



Aethers cohefin^ in a ring . . , . . , ,. ,| . _, |^13, G, Andijewsil'. 



1. Gentiana elegans A. "if'els. Biill, Toir. Bot. Club 25:^76.- 1^98. Annual, 

 2-3 dm. high, branched from the base, the 2-20 stems simple or nfearly s6; 

 each stem or branch terminated by a single flbwer: leaves^ 3-6' pairs ori each 

 stem, mostly obtuse; tjbe lower petioled, obbvate'to broadly spatulate; the 

 upper sessile, oblong or narrower: calyx-lobes nea,rly equal and similar',' equal- 

 ing the tiibe: corolla 4-5 cm. long, deep blue with lighter patches or streaks 

 downward; the lobes obovate-oblong, dentate around the summit; fimbriate 

 on the sides: capsule stipitate: style nearly as long as the capsule proper, the 

 stigma' suborbicular, dentate. G. serrata. Rocky Mountain Fringe6 Gen'-' 

 TiAN. — ^Frequent in moist subalpine parks; throughout ovir rari^e. " 



la. Gentiana elegans unicaulis A. Nels. l. c. Reduced, simple-stemmed 

 alpine form. — Same range. 



2. Gentiana barbellata Engehn. Trans. Acad. St. Louis 2: 216. 1863. 

 Perennial from slender fleshy rootstocks, about 1 dm. high, glabrous through- 

 out, 1-2-flowered: leaves about 4 pairs, narrowly obkticeolate to broadly 

 liiiear, 2-3, cm. long: calyx green with purple streaks, about' 15 mm;' long; the 

 lobes triangular-lanceolate, equaUng or exceeding the tub&i'cdrolla dark bliie, 

 about 25 mm. long' the lobes oblong, obtuse, exceeding the tube, cbrispic- 

 uously long setaceous-laoerate on the sides and often nearly to the summit 

 which is obscurely dentate; the tube arachnoid woolly witKih' especially 

 toward the base: filaments stout, flattened, equkling ths tube? stipi4ialf as 

 long as the elliptic-oblong capsule: style almost wanting. (jG*. Moseleyi A'. 

 Nels. Bpt. ,Gaz. 31: 396. 1901.) Perennial Feinged Gentia**.— Rare; in 

 the Colorado motmtains. ', i 'j : fcxi'; 



3. Gentiana monantha A. Nels. Bull. Torr. Bot., Club 31: 244. 1'904. Ah 

 alpine annual, mpstly much less than 1 drn. fiigh; stem simple br'wiih one or 

 two branchlets from the. base, only 1-3 cm. high, terminaited by^ a slender, 

 naked, J-flowered peduncle very much longer than the stem: leaves oblong to 

 spatulate, 5-10 mm. long; calyx one fourth shorter than the cbrolla and some- 

 what exceeding the tube; sepals 4, equal, oblong-lanceolate, subacute,, distinct 

 nearly to the base: corolla about 12 mm. long; the tube twice as long as the 

 4 lance-ovate, subacute lobes; the fimbriae of the crown 'rather coarse and 

 short: stamens shorter than the corolla-tube. G.tenflla.— In the high moun- 

 tains of Colorado. ''^'' ' '" , 



_ 4. Gentiana heterosepala Engelm. 1. c, 115. Annual, 1-3 dm. high, mostly 

 simple, with few pairs of leaves and long interiaodes': flowers terriiinal and 

 axillary, either solitary and long-pp^uncTed or else in threes with shqrter 

 pedicels, 15-20 mm. long: calyx with two greatly enlarged^ foliaceous, ovate 



