GENTIANACE^. (gENTIAN FAMILY.) dSO 



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

 lancc-linuar (2'-3' long), acittish ; Hppendages of the corolla shorter and less 

 cleft, or almost entire. (G. rncumonanthc, Amer. autlt., .j- Ed. 1. G. linearis, 

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

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

 land) : heginning to hlossom at midsummer. — Seems to pass on one side into 

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



8. G. pub6rula, IMichx. Stems erect or ascending (8'- IC high), mostly 

 ?-oi(///t and minutely pubescent above; leaves rigid varying from linear-lanceolate 

 to oblong-lanceulate, rough-margined (1'- 2' long) ; flowers clustered, rarely soli- 

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

 b.H-fnmiel-form o/ien briglit-lilti corolla, the spreading ovate lobes of which are acutish 

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

 Ell. G. Saponaria, var. pubcrula, 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, peduncled: seeds wingless: anthers separate. 



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

 leaves linear or the lower oblanccolate, rigid ; corolla opcn-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 piae 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 1 801 , to Prof. Benjamin Smith Barton, of Philadelphia.) 



1. B. tenella, Muhl. Stems branched above; the branches or peduncles 

 mostly opposite, 1 - 3-flowered ; lobes of the corolla oblong, acntish, rather longer 

 than the. calg.v, 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, Grisebuch, is a variety with the scales and 

 peduncles mostly alternate, and the petals acute. 



2. B. verna, Muhl. Stem l - few-flowered ; lobes of the corolla s/iatitlate, 

 obtii.se, spreading, thrice the length of the cali/.r ; 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 spatulatc spreading sepals, resembling the leaves. Corolla tubu- 

 lar-l)ell-shaix;d, withering-persistent, 4-clcft ; the lobes oval-oblong, or with age 



