6i8 



GENTIANACEAE. 



[VOL. II. 



15. Gentiana villosa L. Striped Gentian. 

 (Fig. 2880.) 



Gentiana villosa L- Sp. PI. 228. 1753. 

 Gentiana ochroleuca Froel. Gent. 35. 1796. 



Perennial, glabrous or nearly so; stem simple, slen- 

 der, terete, 6 / -i8 / high. Leaves obovate, obtuse or 

 the upper acute, narrowed at the base, faintly 5- 

 nerved, i'-3' long, the lower much smaller; flowers 

 several in a terminal sessile cluster and sometimes also 

 in the upper axils, nearly 2' long, 2-bracteolate under 

 the calyx; calyx-lobes unequal, linear, longer than 

 the tube; corolla greenish white, striped within, ob- 

 ong-funnelform, open, its lobes triangular-ovate or 

 ovate- lanceolate, erect, much longer than the oblique 

 entire or i-2-toothed appendages; seeds oval, wingless. 



In shaded places, southern New Jersey and Pennsylva- 

 nia to Florida and Louisiana. Sept.-Nov. 



16. Gentiana Porphyrio J. F. Gmel. 

 flowered Gentian. (Fig. 2881.) 



Not 



One- 



(ienliana pnrpurea Walt. Fl. Car. 109. 1788. 

 Gentiana Porphyrio]. F. Gmel. Syst. a: 462. 1791 

 Gentiana anguslifolia Micbx. F!. Bor. Am. x: 177. 



L. 1753. 

 1803. 



Perennial, glabrous; stem erect or ascending, simple or 

 branched, 6'-i8' high. Leaves linear, firm, acute or 

 blunt at the apex, i'-2' long, i"-2" wide, or the upper 

 and lower shorter; flowers solitary at the ends of the 

 stem or branches, short -peduncled, about 2' high; calyx- 

 lobes linear, longer than the tube; corolla funnel form, 

 bright blue, sometimes brown-dotted within, its lobes 

 ovate, acutish, spreading, 5"-?" long, three times as long 

 as the conspicuously laciniate appendages, or more; 

 seeds oblong, wingless. 



In moist pine barrens, southern New Jersey to Florida. 

 Aug.-Oct 



5. PLEUROGYNE Eschol. Linnaea, i: 187. 1825. 



Slender usually branched annual glabrous herbs, with opposite leaves, and rather large 

 flowers in terminal narrow racemes or panicles, or solitary at the ends of the slender pedun- 

 cles. Calyx deeply 4-5-parted; segments narrow, often unequal. Corolla rotate, 4~5-parted; 

 lobes ovate or lanceolate, convolute, acute, with a pair of narrow appendages at the base. 

 Stamens 4 or 5, inserted on the corolla-tube; filaments slender or filiform; anthers ovate, 

 sagittate, straight. Ovary i-celled; ovules numerous; style none; stigma decurrent along 

 the sutures of the ovary. Capsule 2- valved. Seeds small and numerous. [Greek, referring 

 to the lateral stigmatic surfaces.] 



About 7 species, of the colder parts of the northern hemisphere, the following in North America. 



Leaves linear or lanceolate; sepals linear, i. P. rotata. 

 Leaves spatulate or lanceolate; sepals ovate to lanceolate. 



2. P. Carinthiaca. 



i. Pleurogyne rotata (L.) Griseb. Pleurogyne. 

 (Fig. 2882.) 



Swerlia rotata L. Sp. PI. 226. 1753. 

 Pleurogyne rotata Griseb. Gent. 309. 1839. 



Stem erect, usually 6'-i5 / high, sometimes lower, sim- 

 ple, or with nearly erect branches. Leaves linear to lan- 

 ceolate, Yz'-i' long, i "-a" wide, or the basal spatulate 

 or oblong, shorter and sometimes broader; sepals nar- 

 rowly linear, or linear-lanceolate, about the length of the 

 lanceolate to oblong-lanceolate corolla- segments which 

 are 4 // -6" long; capsule narrowly oblong. 



Greenland and Labrador to Alaska, south in the Rocky 

 Mountains to Colorado. Also in Europe and Asia. Summer. 



