GENTIANACEJE. (GENTIAN FAMlff .) 347 



Var. linearis. Slender, nearly simple (l-2 high); leaves linear of 

 lance-linear (2' -3' long), acutish; appendages of the corolla shorter and less 

 cleft, or almost entire. (G. Pneumonanthe, Amer. auth. $- ed. 1 : also G. Sapo- 

 naria var. Froelichii. G. linearis, Frod.) Mountain vret glades of Maryland 

 and Penn., L. Superior, Northern New York, New Hampshire (near Concord), 

 and Maine (near Portland). Aug. 



8. G. pubcrula, Michx. Stems erect or ascending (8'- 16' high), most- 

 ly rough and minutely pubescent above ; leaves rigid varying from linear-lanceo 

 late to oblong-lanceolate, rough-margined (l'-2 ; long); flowers clustered, rarely 

 solitary ; calyx-lobes lanceolate, not longer than the tube, much shorter than the 

 bell-funnd-form open bright-blue corolla, the spreading ovate lobes of which are acut- 

 ish and twice or thrice the length of the cut-toothed appendages. (G. Catesbaei, 

 Ett. G. Saponaria, var. puberula, ed. 1.) Dry prairies and barrens, Ohio to 

 Wisconsin, and southward. Aug., Sept. Corolla large for the size of the 

 plant, l'-2' long. Seeds (also in G. Pneumonanthe) not covering the walls, 

 as they do in the rest of this division. 



* * Flower solitary and terminal, peduncled, mostly bractless. 



9. G. angustifolia, Michx. Stems slender and ascending (6' -15' 

 high), simple; leaves linear or the lower oblanceolate, rigid; corolla open-fun- 

 nel-form, azure-blue (2' long), about twice the length of the thread-like calyx- 

 lobes, its ovate spreading lobes twice the length of the cut-toothed appendages ; 

 the tube striped with yellowish. Moist pine barrens, New Jersey, and south- 

 ward (where there is a white variety). Sept. -Nov. 



6. BART ONI A, Muhl. (CENTAURSLLA, Michx.) 



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

 Stamens short. Pod 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, with thread-like stems, and little awl- 

 shaped greenish scales in place of leaves. Flowers small, white, peduncled. 

 (Dedicated, in the year 1801, to the distinguished Prof. Barton, of Philadelphia.) 



1. B. tenella, Muhl. Stems (3' -10' high) 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, E. New England to Vir- 

 ginia and southward ; common. Aug. Centaurella Moseri, Griseb., is only a 

 variety with the scales and peduncles mostly alternate, and the petals acute. 



2. B. verna, Muhl. Stem (2' -6' high) 1- few-flowered; lobes of the co 

 rolla spatulate, obtuse, spreading, thrice the length of the calyx; anthers oblong; 

 ovary flat. Bogs near the coast, Virginia and southward. March. Flowers 

 &t-it long, larger than in No. 1. 



7. OB OL. ARIA, L. OBOLARIA. 



Calyx of 2 spatulate spreading sepals, resembling the leaves. Corolla tubu- 

 lar-bell-shaped, withering-persistent, 4-cleft; the lobes oval-oblcng, or with ago 



