294 GENTIAN FAMILY. 



G. ochroleuca, Froel. Leaves obovate or spatulate-oblong, narrowed 

 at the base ; calyx lobes linear ; corolla greenish-white, with greener and 

 purplish stripes inside, somewhat bell-shaped ; anthers separate ; seeds 

 wingless. Penn., S. 



++ *+ Corolla more club-shaped and seldom open, truncate, with no proper 



lobes. 



Q. Andre'wsii, Griseb. Closed G. Leaves lanoe-ovate or lance- 

 oblong, with a narrowed base ; calyx lobes ovate or oblong, short ; corolla 

 blue (rarely a white variety), its proper lobes if any shorter than the 

 broad and more conspicuous fringe-toothed and notched appendages, 

 which terminate the folds ; anthers connected ; seeds broadly winged. 

 N. Eng., N. and S. 



«- -i- Stems low, bearing 1-3 slender-peduncled flowers ; seeds wingless. 



G. angustifdlia, Michx. Pine barrens from N. J., S. ; 6'-15' high, 

 with linear leaves, and open funnel-form azure-blue corolla 2' long, its 

 lobes ovate ; anthers separate. 



4. BARTONIA. (Named for Prof. B. 8. Barton, of Philadelphia.) 

 Insignificant herbs, with awl-shaped scales for leaves, and a few 

 peduncled white flowers. (I) ® 



B. tene'lla, Muhl. 6'-10' high, with branches or peduncles 1-3-flow- 

 ered ; lobes of corolla oblong, acutish ; ovary 4-angled ; flowers summer. 

 N. Eng., W. and S. 



B. ve'rna, Muhl. Smaller, less branched, 1-f ew-flowered ; flowers 

 larger, in early spring ; lobes of corolla spatulate, obtuse ; ovary flat. 

 Va., S. 



5. OBOLAHIA. (Named for a Greet coin, in allusion to the thick 

 rounded leaves.) % 



O. Virgfnica, Linn. Smooth and purplish, rather fleshy plant, 3'-8', 

 with a nearly or quite simple stem, and dull white or purplish flowers 

 either solitary or in clusters of 3. N. J., W. and S. 



6. MENYANTHES, BUCK BEAN. (Greek: month and flower; ap- 

 plication not obvious. The popular name from the leaves, somewhat 

 resembling those of the Horsebean.) 



M. trifoliata, Linn. Cold wet bogs N. ; flowers late spring j corolla 

 white or tinged with pink, pretty ; scape hardly 1° high. y. 



7. LIMNANTHEMUM, FLOATING HEART. (Greek for swamp 

 and blossom.) Our species grow in water, and produce through the 

 summer the small white flowers, accompanied by spur-like, thick 

 bodies, probably of the nature of roots. % 



L. lacundsum, Griseb. Common B. and S.; leaves l'-2' long, on very 

 slender petioles, entire ; lobes of corolla broadly oval j seeds smooth and 

 even. 



L. trachyspe'rmum, Gray. In deeper water, from Md. S.j leaves 

 rounder, 2M5' broad, wavy -margined, roughish or dark-pitted beneath; 

 petioles stouter ; seeds roughened. 



