240 DICOTYLEDONOUS PLANTS. 



segments lanceolate, mucronate ; calyx very short. G. amarelloidet 

 Mich. Pursh. 



HAB. Woods. N. Y. to Car. W. to Miss. July, Aug. <?. 

 Stem 1218 inches high. Floicers small, pale blue, generally 

 3 5 on the summit of the branches. 



5. G. angustifolia Mich. : stem terete, smooth, simple, slender, 1- 

 flowered ; leaves linear, spreading, smooth, the lower ones somewhat 

 wedge-shaped ; corol funnel-form, 5-cleft; inner segments lacerate. 

 A. purpurea Walt. 



HAB. Sandy fields. N. J. to Car. Aug., Sept. U.Stem a 

 foot high. Flowers large, sky blue, terminal. 



6. G. linearis Mild. :- stem simple, somewhat scabrous ; leaves 

 linear-lanceolate, undulate, and with the segments of the calyx ciliate ; 

 flowers sessile, in crowded terminal fascicles ; corol campanulate, 5- 

 clefl ; segments obtuse, with the inner folds toothed. G. pubenda 

 Mich. 



HAB. Mountains. Penn. Pursh. Aug. 14.. Flowers blue, mid- 

 die-sized. 



** Corol 4-cleft, funnel-form ; segments ciliate. CROSSOPETALUM. 



7. G. crinita WiUd. : stem smooth, terete, below, square above ; 

 branches elongated, 1-flowered ; leaves lanceolate, acute ; corol 4-cleft; 

 segments obovate, fringed at the top ; inner folds simple. 



HAB. Pastures and Woods. Can. to Car. Oct., Nov. <J . 

 Stem 18 inches high. Flowers large, sky blue, fringed on the 

 edges, tetrandrous. Fringed Gentian. 



2. SWERTIA. Linn. 



Calyx flat, 4 5-parted. Corol rotate ; tube very short ; 

 border 4 5-parted ; segments lanceolate, with 2 nectariferous 

 ciliate pores at the base of each. Stamens 4 5. Style 

 short, terminated by 2 stigmas. Capsule 1-celled, 2-valved. 



Tetrandria. Monogynia. 



1. <S. deflexa Smith: stem 4-sided ; branches short ; leaves opposite, 

 sessile, ovate ; corol campanulate, with deflexed horns at the base. 

 S. corniculata Pursh. 



HAB. Swamps. Can. and N. Y. Aug. <?. Stem 18 inches 

 high. Flowers axillary and terminal, greenish-yellow. Plant 

 almost black when dried. It has been found in Canada by Mr. 

 Goldie, and near Fairfield, N. Y. by Prof. Hadley. Febcort. 



2. S. pusilla Pursh: stem simple, 1-flowered; leaves few, small, ob- 

 long ; corol rotate, twice as long as the calyx ; segments oblong, acu- 

 minate. 



HAB. White Hills, N. H. June. If. Pursh. Stem on inch 

 high. Leaves 1 or 2 pairs, small. Flowers large, blue. 



