GENTIANACE^E. (GENTIAN FAMILY.) 347 



Tar. 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. (6. PneumonAnthe, Amer. auth. ^ ed.l: also G. Sapo- 

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

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

 and Maine (near Portland). Aug. 



8. a. piibfirula, Michx. Stems erect or ascending (8'- 16' high), most- 

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

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

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

 bell-fmmel-form open bright-ilue corolla, the spreading ovate lobes of which are acut- 

 ish and twice or thrice the length of the cuMoothed appendages. (G. Catesbaei, 

 Ell. G. Saponaria, var. pnberula, ed. 1.) — Dry prairies and barrens, Ohio to 

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

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

 as they do in the rest of this division. 



* # Flower solitan/ and terminal, pedunded, mosdy bractless. 



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

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

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

 lobes, its ovate spreading lobes twice the length of the cat-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-cl«ft, destitute of glands, fiinges, 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. tencila, Muhl. Stems (3'- lO' high) branched above; the branches 

 or peduncles mostly opposite, 1-3-flowered; lobes of the corolla oblong, acutish, 

 ratlier longer than the calyx, or sometimes twice as long ; anthers roundish ; ovary 

 4-anglcd, the cell somewhat cruciform. — Open woods, E. New England to Vir- 

 ginia and southward ; common. Aug. — Centam'ella Moseri, Griseb., is only a 

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



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

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

 ovai-y flat. — Bogs near the coast, Virginia and southward. March. — Flowers 

 3"-4" long, larger than in No. 1. 



7. OBOJLARIA, L. Obolaeia. 



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

 lar-bell-shaped, withering-persistent, 4-cleft ; the lobes oval-ohlong, or with aga 



