294 GENTIAN FAMILY. 



G. ocbroleilca, 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. 



G. Andr^wsii, Griseb. Closed G. Leaves lance-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 sliorter 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. 



■*- ■*- Stems low, bearing 1-3 slender-peduncled flowers ; seeds wingless. 



G. angustif6lia, 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. S. Barton, of Philadelphia.) 

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

 peduncled white flowers. ® (|) 



B. ten^lla, Muhl. 6'-10' high, with branches or peduncles 1-3-flov?- 

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

 N. Eng., W. and S. 



B. v^ma, Muhl. Smaller, less branched, 1-few-flowered ; flowers 

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

 Va., S. 



5. OBOLARIA. (Named for a Greek coin, in allusion to the thick 

 rounded leaves.) % 



O. Virginica, 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 smd flower ; ap- 

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

 resembling those of the Horsebean. ) 



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

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



7. LIMNANTHEMUM, FLOATING HEART. (Greek for stcarnp 

 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. 2/ 



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

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

 even. 



L. trachysp^rmum, Gray. In deeper water, from Md, S.; leaves 

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

 petioles stouter ; seeds roughened. 



