62 THE FLORA OF THE ALPS 
S. perennis, L.; stem 6-12 in., flowers blue-violet, 
on longish stalks, upper stem-leaves opposite, leaf-staik 
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 1-celled. 
P. carinthiaca, Griseb. (Lomatogonium carinthiacum, 
A. Br.); flowers light or dark blue, on long stalks, stem 
I—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. (Pl. 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 
