DICOTYLEDONS. 183 



oblong, narrowed at the base, the upper linear, sessile; flowers termi- 

 nal, sometimes 2-o together on short peduncles, 2-bracted ; calyx 

 lobes 7-12, narrowly lanceolate ; corolla 7-12-parted, bright rose 

 color, 11^-2 in. wide; anthers straight. June- August. Low pine 

 barrens. 



11. GENTIANA. 



Annual or perennial herbs, mostly blooming after mid- 

 summer ; leaves opposite or verticillate, sessile or short- 

 petioled ; flowers showy, solitary or clustered, terminal or 

 axillary ; calyx tubular, 4-5-parted ; corolla tubular, funnel- 

 form or salver-form, 4-5-lobed, often with plaited and toothed 

 folds between the lobes ; stamens 4-5, alternate with the lobes 

 of the corolla and inserted in the tube, distinct or united by 

 the anthers, included ; ovary 1-celled, stymies short or none, 

 stigmas 2 ; fruit a 1-celled, 2-valved, many-seeded capsule. 



1. G. Elliottii Chap. Elliott's Gentian. Perennial; stem 

 erect, slender, somewhat rough-pul)escent, G-18 in. high; leaves ovate 

 to narrowly lanceolate, acute at the apex, rounded and clasping at 

 the base, rough-margined, 3-nerved ; flowers in terminal and axillary 

 clusters, about 2 in. long, sessile or nearly so, 2-bracted ; calyx lobes 

 oblong, twice as long as the tube ; corolla funnel-form, bright blue 

 without, deep l)lue and yellow within, the lobes short, ovate, obtuse, 

 folds between the lobes 2-toothed and fimbriate; anthers cohering 

 in a tube; seeds oblong, winged; plant quite variable. September- 

 October. In moist soil. 



2. G. PoKi'iiYKio (imel. Nakkow-lkavkd Gentian. Peren- 

 nial; stem erect, glalu'ous, simple or branched, 4-15 in. high; leaves 

 opposite, linear and somewhat fleshy; flowers terminal, solitary; 

 calyx lobes linear, erect, a little longer than the tube; corolla spread- 

 ing, funnel-form, bright blue, 1^-2 in. long, the lobes ovate, acute, 

 two or three times as long as the laciniate folds; anthers not united; 

 seeds oblong, wingless. August-October. Moist pine barrens. 



III. FRASERA. 



Perennial or biennial herbs; st<uus mostly tall and gla- 

 brous ; leaves oi)posit(^ or verticillate, sessile ; flowers in 

 ttu-minal, cymose panicles or thyrses ; calyx 4-parted ; corolla 

 4-parted, the lobes spreading and bearing 1 or 2 fringed 

 glands upon the upper face ; stamens 4, inserted in the tube 

 of the corolla ; ovary 1-celled, style usually short, persistent, 



