352 GENTIANACE^E. (GENTIAN FAMILY.) 



PLEUKOGYNE CARINTHIACA, Griseb., var. pusf LLA, Gray, a low few-flowered 

 annual, with rotate blue or' bluish 4-5 parted corolla and a pair of scale-like 

 appendages on the base of its divisions, is found from the Arctic Coast to the 

 Lower St. Lawrence and Newfoundland, and was reported by Pursh from the 

 summits of the White Mountains, but has not sinte been found. 



5. ERASER A, Walt. AMERICAN COLUMBO. 



Calyx deeply 4-parted. Corolla deeply 4-parted, wheel-shaped, each division 

 with a glandular and fringed pit on the face. Filaments awl-shaped, usually 

 somewhat monadelphous at base ; anthers oblong, versatile. Style persistent ; 

 stigma 2-lobed. Capsule oval, flattened, 4-14-seeded. Seeds large and flat, 

 wing-margined. Tall and showy herbs, with a thick root, upright and mostly 

 simple stems, bearing whorled leaves, and numerous peduncled flowers in open 

 cymes, disposed in an ample elongated panicle. (Dedicated toJolm Fraser, an 

 indefatigable collector in this country toward the close of the last century.) 



1. P. Carolinensis, Walt. Smooth biennial or triennial (3-8 high); 

 leaves mostly in fours, lance-oblong, the lowest spatulate, veiny ; panicle py- 

 ramidal, loosely flowered; corolla (!' broad) light greenish-yellow, marked 

 with small brown-purple dots, its divisions oblong, mucronate, longer than 

 the narrowly lanceolate calyx-lobes, each with a large round gland below the 

 middle; capsule much flattened parallel with the flat valves. Kich dry soil, 

 western N. Y. to Wise., south to Ga. 



6. HALENIA, Borkh. SPURRED GENTIAN. 



Calyx 4 - 5-parted. Corolla short bell-shaped, 4 - 5-cleft, without folds or 

 fringe, prolonged at the base underneath the erect lobes into spurs, which are 

 glandular in the bottom. Stigmas 2, sessile, persistent on the oblong flattish 

 capsule. Seeds rather numerous, oblong. Small and upright herbs, with 

 yellowish or purplish panided-cymose flowers. (Named for John Halen, a 

 German botanist.) 



1. H. deflexa, Grisebach. Leafy annual or biennial (9-18' high), simple 

 or branched above ; leaves 3 - 5-nerved, the lowest oblong-spatulate and peti- 

 oled, the others oblong-lanceolate, acute ; spurs cylindrical, obtuse, curved, 

 descending, half the length of the acutely 4-lobed corolla. Damp and cool 

 woods, from N. Maine and W. Mass, to L. Superior, Minn., and northward. 



7. BARTONIA, Muhl. 



Calyx 4-parted Corolla deeply 4-cleft, destitute of glands, fringes, or folds. 

 Stamens short. Capsule oblong, flattened, pointed with a large persistent at 

 length 2-lobed stigma. Seeds minute, innumerable, covering the whole inner 

 surface of the pod. Small annuals or biennials (3-10' high), with thread- 

 like stems, and little awl-shaped scales in place of leaves. Flowers small, white, 

 peduncled. (Dedicated to Prof. Benjamin Smith Barton, of Philadelphia.) 



1. 33. tGnella, Muhl. Stems branched above, the branches or peduncles 

 mostly opposite, 1 -3-flowered : lobes of the corolla oblong, acutish, rather longer 

 than the calyx, or sometimes twice as long; anthers roundish : ovary 4-angled, 

 the cell somewhat cruciform. Open woods, Newf. to Wise., south to Va. 

 and La. Aug. Scales and branches occasionally alternate. 



