GENTIANACEAE (GENTIAN FAMILY) 655 



* Corolla b-parted, or rarely 6-7-parted. 

 •4- Branches all opposite and stems more or less A-angled; flowers cymose • calyx 

 ivith long and slender lobes. ' ' 



■w. Corolla ivhite, often turning yellowish in drying. 



1. S. paniculata (Michx.) Pursh. Stem much branched, 2-7 dm. high • 

 leaves linear or the loioer oblong, obtuse, 1-nerved, nearly equaling ihe inter- 

 nodes ; calyx-lobes much shorter than the corolla. — Low grounds, Va to Fla 



2. S. lanceolata (Walt.) T. & G. Stem simple, 4-9 dm. high, bearing a flat- 

 topped cyme ; leaves ovate-lanceolate or ovate, S-nerved, the upper acute, much 

 shorter than the internodes ; calyx-lobes longer and flowers larger than in no. 1. 

 — Wet pine barrens, N. J. to Fla. 



•w. -H- Corolla rose-pink, rarely white, with a yellowish or greenish eye. 



3. S. brachiata Ell. Stem slightly angled, simple below, 3-6 dm. high ; 

 leaves linear and linear-oblong, obtuse, or the upper acute ; branches rather 

 few-flowered, forming a panicle ; calyx-lobes nearly half shorter than the 

 corolla. (S. angustifolia Britton.) — Dry or low places, Ind. and N. C. to La. 

 and Fla. 



4. S. angularis (L.) Pursh. Stem somewhat A-wing-angled, much branched 

 above, 3-9 dm. high, many-flowered; leaves ovate, acutish, 6-nerved. with a 

 somewhat heart-shaped clasping base ; calyx-lobes one third or half the length 

 of the corolla. —Rich soil, N. Y. to Ont. and Mich., s. to Fla. and La. 



t- 1-- Branches alternate (or the lower opposite in no. 5) ; peduncles 1-flowered. 



t-f Calyx-lobes foliaceous. 



5. S. calycina (Lam.) Heller. Diffusely forking, pale, 1-5 dm. high; leaves 

 oblong or lance-oblong, narrowed at base ; calyx-lobes spatalate-lanceolate, 1-2 

 cm. long, exceeding the rose-colored or almost white corolla. (S. calycosa 

 Pursh.) — Sea-coast and near it, Va. to Tex. 



++ ++ Calyx-lobes slender and tube very short (prominently costate in no. 6, and 

 longer^ nearly or quite inclosing the retuse capsule). 



6. S. campestris Nutt. Stem 0.5-4 dm. high, divergently branched above ; 

 leaves ovate with subcordate clasping base, 1-3 cm. long, on the branches lan^ 

 ceolate; calyx equaling the lilac corolla (3-4.6 cm. broad). — Prairies, Mo. to 

 Tex. 



7. S. stellaris Pursh. Loosely branched and forking; leaves oblong to 

 lanceolate, the upper narrowly linear ; cahjx-lobes awl-shaped-Unear. varying 

 from half to nearly the length of the bright rose-purple corolla ; style nearly 

 2-parted. — Salt marshes, Mass. to Fla. — Appears to pass into the next ; corolla 

 m both at times pink or white. 



8. S. gracilis (Michx.) Salisb. Stem very slender, at length diffusely 

 branched ; branches and long peduncles filiform ; leaves linear, or the lower 

 lance-linear, the uppermost similar to the setaceous calyx-lobes, ichich equal the 

 rose-purple corolla; style cleft to the middle. (S. campanidata Torr.?) — 

 Brackish marshes, s. e. Mass. and N. J. to Fla. and La. 



* * Corolla 8-12-parted, large (3-5.5 cm. broad). 



9. S. dodecandra (L.) BSP. Stem 1-6 dm. high, loosely panicled above ; 

 peduncles slender, 1-flowered ; leaves oblong-lanceolate ; calyx-lobes linear, 

 half the length of the deep rose-colored (rarely white) corolla. (S. chloroides 

 Pursh.) — Borders of brackish ponds, Mass. to N. C. 



2. CENTAIJRIUM Hill. Centaury 



Calyx 4-5-parted, the divisions slender. Corolla funnel-form or salver-form, 

 with slender tube and 4-5-parted limb. Anthers exserted, erect, twisting 

 spirally. Style slender, single; stigma capitate or 2-lipped. — Low and small 

 branching annuals, chiefly with rose-purple or reddish flowers in summer. (An 



