62 THE FLORA OF THE ALPS 



vS. perennis, L. ; stem 612 in., flowers blue-violet, 

 on longish stalks, upper stem-leaves opposite, leaf-stalk 

 square ; boggy alpine meadows, local. 



4. PLEUROGYNE, Esch. 



Flowers solitary ; calyx 5 - toothed ; corolla rotate, 

 5-lobed, bearded, without nectariferous glands ; stigma 

 sessile upon the ovary; capsule I -celled. 



P. carinthiaca, Griseb. (Lomatogonium carinthiacum, 

 A. Br.); flowers light or dark blue, on long stalks, stem 

 1-2 in., branched, leafy, leaves ovate, acute; high alpine 

 pastures, rare; Grisons, Valais (Saas, Zermatt), Glarus, 

 Tirol, Carinthia, Carniola, Salzburg. 



5. GENTIANA, L. 



Flowers solitary or in terminal cymes, usually deep 

 blue; calyx- teeth, corolla-lobes, and stamens each 4-6; 

 corolla often bearded at the throat; ovary I -celled; stigmas 

 2, persistent; seed-vessel a 2-valved capsule. Although 

 some species are lowland plants, the Gentians are espe- 

 cially an alpine genus, and are among the commonest and 

 most beautiful of the plants of the higher Alps. 



A. Flowers large, in whorls, yellow or purplish: G. 

 lutea, L. (PI. 83) ; stem erect, 2-4 ft., corolla yellow with 

 brown dots, 5 -cleft nearly to the base, leaves thick, stem- 

 leaves half-clasping ; alpine pastures, frequent. G. pur- 

 purea, L. ; calyx sheathing, split on one side only, corolla 

 6-lobed half-way down, purple outside, yellowish inside ; 

 pastures; Southern Switzerland, Vorarlberg, Tirol, rare. 

 G. pannonica. Scop.; calyx-teeth equal, reflexed, corolla 



