GENTIANACE^. (GENTIAN FAMILY.) 347 



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

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

 cleft, or almost entire. (G. Pneumonanthe, Amer. aut/i. ij- ed. 1 : also G. Sapo- 

 naria var. Frcelichii. G. linearis, Fred.) — Mountain wet glades of Maryland 

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

 and Maine (near Portland). Aug. 



8. O. ptibrrala, Miehx. 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 

 beU-fannel-form open bright-blue corolla, the spreading ovate lobes of which arc acut- 

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

 Ell. 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, 1^' -2' long. Seeds (also in G. Pneumonanthe) not covering the walls, 

 as they do in the rest of this division. 



* # Flower solitary and terminal, pedunclcd, mostly bractless. 



9. G. ailg-ustifulia, Miehx. Stems slender and ascending (G'-l^ 

 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. BAKTOSIIA, Muhl. (Centaurella, Miehx.) 



Calyx 4-parted. Corolla deeply 4-clcft, 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. teiielki, 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 

 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, withering-persistent, 4-cleft; the lobes oval-oblcng, or with a°-e 



