GENTIANACE^l. (GENTIAN FAMILY.) 389 



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

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

 cleft, or almost entire. (G. Pneumonanthe, Amer. auth., Sf Ed. 1. G. linearis, 

 Fred.) Mountain wet glades of Maryland and Penn., to Lake Superior, 

 Northern New York, New Hampshire (near Concord), and Maine (near Port- 

 land) : beginning to blossom at midsummer. Seems to pass on one side into 

 G. Saponaria, on the other into G. Pneumonanthe of Europe. 



8. G. pub6rula, Michx. Stems erect or ascending (8'- 1 6' high), mostly 

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

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

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

 bell -funnel-form oj>en bright-blw corolla, the spreading ovate lobes of which are acutish 

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

 Ell G. Saponaria, var. puberula, Ed. 1.) Dry prairies and barrens, Ohio to 

 Wisconsin, and southward. Flowering near the end of summer. Corolla large 

 for the size of the plant, 1^-2' long. Seeds (also in G. Pneumonanthe) not 

 covering the walls, as they do in the rest of this division. 



# * Flowers 1-3, pedunded : seeds wingless : anthers separate. 



9. G. angustif61ia, Michx. Stems slender and ascending (6' - 15' high) ; 

 leaves linear or the lower oblanceolate, rigid ; corolla open-funnel-form, azure- 

 blue, also a greenish and white variety (2' long), about twice the length of the 

 thread-like calyx-lobes, its ovate spreading lobes twice the length of the cut- 

 toothed appendages. Moist pine barrens, New Jersey, and southward. 



6. BARTONIA, Muhl. ( CENTAURELLA, 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 (3' - 10' high), with thread-like stems, 

 and little awl-shaped scales in place of leaves. Flowers small, white, peduncled. 

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



1. B. tendlla, Muhl. Stems 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, New England to Wisconsin and south- 

 ward. Aug. Centaurella Moseri, Grisebach, is a variety with the scales and 

 peduncles mostly alternate, and the petals acute. 



2. B. verna, Muhl. Stem 1 - few-flowered ; lobes of the corolla spatulate, 

 obtuse, spreading, thrice the length of the caJyx ; anthers oblong ; ovary flat. Bogs 

 near the coast, Virginia and southward. March. Flowers 3" - 4" long, larger 

 than in No. 1. 



7. OBOLARIA, L. OBOLARIA. 



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

 lar-bell-shaped, Avithering-persistent, 4-cleft ; the lobes oval-oblong, or with age 



