210 SUB-ALPINE PLANTS 



finely pubescent, with creeping rootstock. Leaves opposite, entire, 

 shortly petioled, the middle ones cordate-ovate, dark green in 

 colour. Flowers small, dirty white or yellowish in axillary clusters, 

 petioled. Follicles glabrous, very large (1^-2 inches), lanceolate- 

 acuminate, swollen towards the base, and when ripe showing 

 beautiful silky seeds. Polymorphic. 



Stony, thickety places, common in the plains and lower moun- 

 tains. June to September. 



Distribution. — Europe, Caucasus, N. Africa. Widely spread 

 throughout France and Switzerland. 



LENTIBULARIACE^ 



Marsh or aquatic plants with radical or floating leaves, or rarely 

 none, and irregular flowers on leafless radical or terminal peduncles. 

 Corolla 2-lipped, projecting below into a spur or pouch. Stamens 2. 

 Ovary and capsule i-celled. 



A family of very few genera, dispersed over the greater part of 

 the globe. 



PiNGUicuLA L. Butterwort. 



Small insectivorous plants growing in bogs or on wet rocks, with 

 radical, entire leaves, purple or yellowish flowers on leafless, 

 radical peduncles. Corolla spurred, with a broad, open mouth. 

 Capsule opening in 2 or 4 valves. Dead flies are frequently seen 

 on the leaves. 



Pinguicula alpina L. 



Leaves in radical rosettes, lanceolate or obovate, obtuse, entire, 

 with revolute margins, thick, glabrous, or covered with viscid 

 glands. Stem erect, i-flowered. Corolla pendent, creamy white 

 with yellow spots on the central lobe and apex of the spur, which 

 is gibbous. 



Wet rocks and damp, stony pastures in Alpine and sub-alpine 

 regions and in Switzerland, descending to turf-moors in the plain. 

 May to July. 



Distribution.— yioyxaiaxn ranges of Central Europe and Russian 

 Asia. Arctic Europe and Asia. British. 



Pinguicula vulgaris L. Common Butterwort. 



Leaves similar to the last, but larger. Spur of corolla subulate, 

 slender, about half length of corolla. Flowers violet, larger than in 

 P. alpina. 



Wet rocks and damp places, and especially in peaty meadows 

 from the plains to about 6500 feet. May to July. 



Distribution. — Europe and all round the Arctic Circle, Russian 

 Asia, and North American. British. 



