GENTIANACEAE 929 



spatulate or oblong-spatulate, twice or thrice as long as the calyx-lobes : capsules oval, 

 about 1 cm. long. {_S. chloroides var. stricta A. Gray.] 



In pine-land swamps, Georgia to Florida and Alabama. Summer and fall. 



4. LAPITHEA Griseb. 



Annual or biennial caulescent herbs, with glabrous foliage. Leaves opposite : blades 

 narrow, sessile. Flowers solitary or few in congested terminal cymes. Calyx sessile, 

 membranous: lobes mostly 7-10, narrow, unequal. Corolla red, purple or pink, rotate: 

 lobes 7-10, spreading, narrow, contorted. Stamens 7-10, partially adnata to the corolla 

 tube. Filaments short, but filiform. Anthers merely curved. Ovary 1-celled with in- 

 truding placentae : styles wholly united : stigmas 2. Capsules little longer than broad, 

 2-valved. Seeds numerous, reticulated. 



Stem-leaves with oblong or oblong-lanceolate blades : bracts oval or oblong. 1. L. Boijkinii. 



Stem-leaves with narrowly linear blades: bracts linear. 2. L. gentianoides. 



1. Lapithea Boykinii (A. Gray) Small. Stems erect, 2-4 dm. tall, simple or nearly 

 so : leaf-blades broadly oblong to oblong-lanceolate, 1.5-4 cm. long, obtuse or acutish, par- 

 tially clasping: tiowers solitary or clustered: bracts oval or oblong: calyx glabrous; 

 lobes lanceolate or linear-lanceolate, 5-9 mm. long : corolla pink or whitish ; lobes spatu- 

 late or ablong-spatulate, 1.5-2 cm. long, longer than the calyx-lobes. [Sabbatia Boykinii 

 A. Gray.] 



In swamps. Georgia and Alabama. Summer and fall. 



2. Lapithea gentianoides (Ell. ) Griseb. Stems erect, 2-7 dm. tall, simple or nearly 

 so : leaf-blades spatulate to oblong at the base of stem, 2-5 cm. long, the upper linear, 

 3-10 cm. long, involute: fiowers solitary or in terminal clusters: calyx glabrous; lobes 

 lanceolate-subulate, 8-12 mm. long : corolla reddish, lilac or pink-purple ; lobes spatulate 

 or oblong-spatulate, 2-2.5 cm. long, much longer than the calyx-lobes. \_Sabbatia gentia- 

 noides Ell.] 



About pine-barren ponds, Georgia to Florida. Summer. 



5. ANTHOPOGON Neck. 



Annual, biennial or rarely perennial herbs. Leaves opposite : blades entire, sessile. 

 Flowers perfect, solitary at the end of the stem or its branches, the whorls mostly of 4 

 parts each. Calyx relatively large : lobes imequal, keeled, the inner broader and markedly 

 wider than the outer, scarious- or hyaline-margined. Corolla showy : tube campanulate- 

 funnelform : lobes more or less spreading, erose or fimbriate, not accompanied by plaits in 

 the sinuses. Stamens usually accompanied by a row of glands at the base of the filaments. 

 Ovary 1-celled. Ovules numerous. Capsule stipitate. Fringed Gentian. 



1. Anthopogon crinitum (Froel. ) Kaf. Annual. Stems 2-5 dm. tall, commonly 

 branched : leaf-blades ovate to lanceolate, mainly 2-5 cm. long, sessile and partly clasping : 

 calyx 2.5-3 cm. long, glabrous, the outer lobes lanceolate, acuminate, the inner much 

 broader, scarious-margined : corolla deep sky-blue, 4-5 cm. long ; lobes spreading, copi- 

 ously fimbriate beyond the middle : capsule about 3 cm. long. [Gentiami crinita Froel.] 



In low grounds, Quebec to Minnesota, Georgia and Iowa. Late summer and fall. 



6. GENTIANELLA Moench. 



Annual, biennial or perennial herbs. Leaves opposite : blades entire, mainly sessile. 

 Flowers perfect, solitary or in open or contracted cymes, the whorls of 4 parts each or 

 sometimes of 5 parts. Calyx relatively small : lobes imbricated, essentially equal, or the 

 outer broader than the inner. Corolla funnelform or salverform : lobes entire or sparingly 

 toothed, not accompanied by plaits in the sinuses, but often filamentose at the base. 

 Ovary 1-celled. Ovules numerous. Capsule mainly sessile. 



1. Gentianella quinquefolia ( L. ) Small. Annual or biennial. Stems 1-11 dm. 



tall, more or less branched, 4-winged : leaf-blades ovate to lanceolate, 2-8 cm. long, acute, 



sessile and partly clasping: flowers solitary or sometimes fully 360 on a single plant: 



calyx deep green, 6-9 mm. long ; lobes linear, acute or acuminate, much longer than the 



tube : corolla blue or purplish blue, about 2 cm. long ; lobes 5-7 mm. long, slenderly 



acuminate: capsule about 1.5 cm. long. [Gentiana quinquefolia L.^ 



In moist soil or woods, Maine and Ontario to Michigan, Florida and Missouri. Summer and fall. — 

 The form with larger foliaceous calyx-lobes and a more funnelform corolla, is G. quinquefolia occidentalis 

 (A. Gray) Small. [Gentiana quinqueflora var. occidentalis A. Grav.] 



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