LENTIBULACEiE. 359 



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

 Their spurred flowers have a general resemblance to those of Linaria in 

 the iScropAa/aWa family, next to which they might perhaps be better placed, 

 although the ovary and capsule are those of the Primrose family, with which 

 botanists more generally associate them. 



Calyx 4- or 5-lobed. Leaves entire, radical 1. Butteewort, 



Calyx 2-lobed. Leaves floating, mucb divided 3. Blabdeewoet. 



I. BXJTTER"WORT. PINGUICULA. 



Plants growing in bogs or on wet rocks, with radical, entire leaves, and 

 yellow or purple flowers, on leafless radical peduncles. Calyx with 4 or 

 5 teeth or lobes, arranged in two hps. Corolla spurred, with a broad, open 

 mouth ; the upper lip short, broad, and 2-lobed ; the lower one much longer, 

 broadly 3-lobed. Capsule opening in 2 or 4 valves. 



The genus is limited to the northern hemisphere. 



Flowers violet-pui-ple, often large. Spur long, slender, and nearly 



straight 1. Common B. 



Flowers yellow or pale-coloured. Spur small, conical or curved. 



Spur very short, nearly straight. Middle lobe of the lower Up of 



the corolla much longer than the others. Upper lip short . . 2. Alpine B. 

 Spur curved. Lobes of the lower lip of the corolla nearly equal, and 



scarcely longer than the upper lip 3. Pale B. 



1. Common Butterwort. Finguicula vulgaris, Linn. 

 (Eng. Bot. t. 70.) 



Leaves spreading, ovate or broadly oblong, of a light green, somewhat 

 succulent, and covered with little crystalUne points, wliich give them a wet, 

 clammy appearance. Flower-stalks 3 to 5 inches high, with a single hand- 

 some, bluish-purple flower ; the broad, campanulate throat of the corolla 

 attached laterally to the receptacle, and projected below into a slender 

 spur about its own length ; the lobes broad, the 2 upper ones (ne.\t the 

 calyx) considerably shorter than the 3 lower ones. Capsule ovate, longer 

 than the calyx. 



Along mountain riUs and on wet rocks, in northern Europe, aU round 

 the Arctic Circle, and along the mountain-ranges of central and southern 

 Em-ope and Russian Asia. In Britain, chiefly in the western hUly dis- 

 tricts of England and Scotland, and ia Ireland. Fl. summer, commencing 

 very early. A large-flowered and very handsome variety, with broader 

 lobes to the corolla, {P. grandijlora, Eng. Bot. t. 3184) occurs in the bogs 

 of south-western Ireland, and here and there in the western parts of the 

 continent of Europe, where however it passes gradually into the commoner 

 form. 



2. Alpine Butterrtrort. Finguicula alpina, Linn. 

 (Eng. Bot. Suppl. t. 2747.) 



Generally a smaller plant than the common B., with much smaller flowers, 

 of a pale yellow or shghtly purphsh colour. The spur is short and obtuse, 

 the lobes of the corolla unequal and broad, the middle one of the lower hp 

 much longer and broader than the two lateral ones. 



A very northern or liigh alpme plant, common in the Arctic regions of 

 Europe and Asia, and along the higher ranges of central Europe and Eus- 

 sian Asia. In Britain it has only been found in the extreme north of Scot- 

 land. Fl. early summer. 



