GENTIANACE^E. (GENTIAN FAMILY.) 347 



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. Pnenmohdnthe, Amer. auth. $ ed. I : also G. Sapo- 

 naria var. Frcelichii. G. linearis, Fred.) Mountain V7et glades of Maryland 

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

 and Maine (near Portland). Aug. 



8. O. |>ul>riila, 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 (!' 2' long); flowers clustered, rarely 

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

 bell-funnel-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. Catcsbaei, 

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

 as they do in the rest of this division. 



* * F lower solitary and terminal, peduncled, mostly bractless. 



9. G. ailgUStifdlia, Michx. Stems slender and ascending (6'-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. 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, with thread-like stems, and little awl- 

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

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



1. 15. tenclla, 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. Vema, Muhl. Stem (2' -6' high) 1 - few-flowered ; lobes of the co- 

 rclla 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 OBOJLARIA, L. OBOLARIA. 



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

 le r-bell-shape<f., withering-persistent, 4-cleft; the lobes oval-oblong, or with age 



