380 GENTIAN ACEAE {(gentian FAMILY) 



cleft, less 1 than halloas Icmg as the corolla: eorolla deep purple, .3-4 cm. long, 

 the lobes ellipticrobovate ; stamens short; anthers sagittate, erect: style, stout- 

 ish, sdarcely longer than the ovary and shorter than the mature capsule. — 

 Colorado. 



3. PLEUROGYNE Eschsch. 



Small aniiuals of cold regions,, with blue oi: whitish flowers, and distinguished 

 by the remarkable decurrent stigmas. 



1. Pleurogyne fontana A. Nels. Proc. Biol. Soc. Wash. 17: 177. 1904. 

 Glabrous throughout; steins slender, simple or with a few narrower erect 

 branches, 1-4 dm. high: leaives linear, mostly narrowly so, thin, with distinct 

 midrib and two faint lateral nerves,, ,20-25 mm. long: flowers in a narrow 

 spmpwfiat panicled raceme, haying long, very slender pedicels, pentamerous: 

 sepajs. green, linear, resembling the bracts but shorter, usiially 3-iierved as 

 ai'e also the bracts: corolla ofte'n surpassed by the sepals, its Ibbes elliptic- 

 oblong, subacute, about 5-nerved: stamens half as long as the coroUadobes;; 

 the anthers oblong; mature capsule translucent,, with numerous ovules, ulti- 

 mately as long as the sepal^, P. rototo.— Colorado antj Wyoming. 



4. CHONDROPHYLLA A. Nels. 



Small annuals or biennials, from a few cm. to 1 dm. high, the stems single 

 or several from the slender root. Lea,ves numerous, small,, opposite, seem- 

 ingly imbricated below because of the short internodes, the margins white 

 and scarious or cartilaginous. Flowers: solitary and terminal. Calyx narrow, 

 4 or 5-tooth"ed. Corolla salvetform wheii expanded, phcate at the sinuses 

 with broad emarginate lobes or plates, without crown or glands. Anthers 

 cordate, versatile. Seeds oblong, with a close coat. 



Leaves broadly scarious-margined; capsule at maturity exsert-stipitate 1. C. Fremontii. 

 Leaves narrowly margined; capsule short-stipitate . , ' . . 2. C. americana. 



1. Chondrophylla Fremontii (Torr.).A..Nels. Bull. Torr. Bot. Club 31: 245. 

 1904. Stems few-many, erect or ascending, 5-10 cm. high, somewhat suc- 

 culent: leaves with a broad white margin, pale, cuspidate ox mucronate; the 

 lower rosulate, orbicular or ovate ; the cauline linear-oblong, connate-sheathing: 

 flowers rotate, short-pediceled, white or dull-colored: capsule clavate-obovatej. 

 at length exserted beyond the flower on a stout stipe^ Geviicma humilis^j— 

 Grassy banks in the, mountains of Colorado and Wyoming. 



2. Chondrophylla' americana (Eilgelm.) A. Nels. 1. C' Stems weakerthan 

 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 inclosing the linear-oblong, rather shoi-t-stipitate 

 capsule. Gentiana prdatrata. — Alpine in our range. 



( V . .. • .' 



5. GENTIANA L. Gentian 



Bitter herbs with conspicuous cymose or rarely solitary flowers of variojis, 

 colors, in siunmer or autumn. Calyx 4-5-cleft. Corolla 4-5-lobed, regular, 

 often with intermediate plaited folds, which bear appendages or teeth atjthe 

 sinuses. -Style short or none; stigmas 2, persistent. Capsule oblong, 2- 

 valved; the innummerable seeds either borne on placentae at or near the 

 sutuifes, or in most of our species covering nearly the whole inner face of the 

 pp.d. ,, ' ■■■'' ■''■ '•• -' 



Annuals (except no. 2); coroUa without extended plaits or lobes or 

 ' tefeth at the sinuses. 

 Flowers large (3-6 cm. long), 4-merou9; of^rollar-Iobes more or less 

 ' fringed. ,,,.,, . i . , ■ 

 Annuel . ., . • -'• ;' , • . . 1. G. elegans. 

 Pferennial . . . . . * 2. G; barbellata. 



