t)68 GENTIANACKAE (GENTIAN FAMILY) 



erect or converging, short and broad, but distinct, and more or less longer than 

 the conspicuous 2-cle£t and minutely toothed appendages. — Moist woods, Ct. to 

 Ont., and southw. 



8. G. Andrfiwsii Griseb. (Closed G.) Stems upright, smooth; leaves 

 ovate-lanceolate and lanceolate from a narrower base, gradually pointed ; calyx- 

 lobes lanceolate to obovate, recurved, shorter than the top-shaped tube, and much 

 shorter than the more cylindric and truncate mostly blue corolla, which is closed 

 at the mouth, the proper lobes equaled by the broad notched appendages. — 

 Moist ground, s. Me. to Man., and southw. — Corolla blue with white plaits, or 

 sometimes all white. 



•t- -1- Margins of leaves, bracts, etc., smooth and naked; terminal flower-cluster 

 leafy-involucrate ; seeds winged. 



9. G. fldvida Gray. Stems upright, stout ; flowers sessile and crowded in 

 a dense terminal cluster ; leaves ovate-lanceolate from a heart-shaped closely 

 clasping base, gradually tapering ; calyx-lobes ovate or subcordate, many times 

 shorter than the tube of the corolla, reflexeOr-spreading ; corolla white, more or 

 less tinged with greenish or yellowish, inflated-club-shaped, at length open, its 

 short and broad ovate lobes twice the length of the broad toothed appendages. 

 {_&. alba Man. ed. 6, not Muhl.) — Sandy woods and meadows, Ont. to Mo., 

 Ky., and Va. 



10. G. linearis Froel. Stems slender and strict, 2.5-7 dm. high ; flowers 1-5 

 in the terminal cluster ; leaves linear or lanceolate, with somewhat narrowed 

 base ; bracts sometimes very finely scabrous ; calyx-lobes appressed-ascending, 

 linear or lanceolate, mostly subequal; corolla blue or white, slender-funnel-form, 

 its erect roundish-ovate lobes a little longer than the triangular appendages. 

 (©. rubricaulis Sohwein.) — Bogs and wet rocks, N. B. to Ont., Minn., N. Y., 

 and Md. 



Var. latifdlia Gray. Stout; leaves closely sessile, not contracted at base, 

 the lowest oblong-linear, the upper ovate-lanceolate; calyx-lobes unequal; 

 appendages broad, acute or subtruneate, mostly thrice exceeded by the corolla- 

 lobes. — L. Superior; N. B. 



»- ^- ^- Calyx-lobes and bracts with the margins smooth or nearly so; seeds 

 completely marginless. 



11. 6. villbsa L. (Sampson's Snakeroot.) Stems ascending, smooth ; 

 leaves from broadly obovate and obtuse to somewhat lanceolate, all narrowed 

 at base ; calyx-lobes linear, unequal, much longer than the tube, rather shorter 

 than the greenish-white open corolla, which is painted inside with green veins 

 and lilac-purple stripes ; coroUa^lobes ovate, much exceeding the small sparingly 

 toothed oblique appendages. (^G. ochroleuca Froel.) — Dry or damp grounds, 

 N. J. and Pa. to Fla. and La. 



*** Anthers not connected; flowers terminal, solitary, commonly peduncled 

 and naked; seeds wingless. 



12. G. Porph^rio J. F. Gmel. Stems slender and ascending, 1-4.5 dm. high, 

 mostly simple ; leaves linear or the lower oblanceolate, rigid ; corolla open- 

 funnel-form, 4-6 cm. long, azure-blue, rarely greenish or white, about twice tlie 

 length of the thread-like calyx-lobes, its ovate spreading lobes twice as long as 

 the cut-toothed appendages. (0. angustifolia Michx.) — Moist pine barrens, 

 N. J. to Fla. 



4. PLEURdGYWE Esch. 



Acute divisions of the showy corolla with a pair of scale-like appendages at 

 base. Stamens inserted at base of corolla. Style none ; stigmas decurrent. — 

 Small annuals of cold regions. (Name from T\evp6v, rib or side, and yvv/i, 

 female; referring to the decurrent lateral, not terminal, stigmas.) 



1. P. rotUta (L.) Griseb. (Marsh Fblwort.) Stem 0.5-3 dm. high, from 

 simple and 1-flowered to fastigiate-branched and many-flowered ; leaves linear 

 or lanceolate, or the lowest spatulate ; sepals linear to lanceolate, resembling the 

 upper leaves, and often much elongated ; corolla blue or white, the 3-5 ovate- 



