294 THE PRIMROSE FAMILY. [Centunculu*. 



Asia, northern and even tropical America, and Australia, but every- 

 where thinly scattered, or frequently overlooked. Local, but in- 

 dicated in many localities in England, and Scotland ; rare in Ireland. 

 PI. summer. 



IX. SAMOLUS. SAMOLE. 



Herbs, with alternate leaves and flowers, in terminal racemes. Calyx 

 campanulate, partially adhering to the base of the ovary, with 5 teeth 

 or lobes. Corolla with a short tube, 5 spreading lobes, and a small 

 scale between each lobe, alternating with the stamens. Capsule in- 

 ferior, opening in 5 valves. 



A -small genus, belonging, with the exception of our own species, ex- 

 clusively to the southern hemisphere. 



1. S. Valerandi, Linn. (fig. 663). Brookweed. A glabrous, bright 

 green annual or perennial, with a tuft of obovate and spreading 

 radical leaves. Flowering stems 3 or 4 inches to near a foot high, 

 slightly branched, bearing a few obovate or oblong leaves, and loose 

 racemes of small white flowers. Pedicels rather long, with a green 

 bract a little above the middle. Capsules small, globular, crowned by 

 the short broad teeth of the calyx. 



Generally diffused over all parts of the world, most abundant in mari- 

 time sands and marshes, but in many countries found also far inland. 

 In Britain, almost always near the sea, and chiefly along the west coast. 

 FL summer and autumn. 



XLVII. LENTIBULACE^. THE PINGUICULA FAMILY. 

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

 sometimes none), and very irregular flowers, either solitary or 

 several in a raceme, on leafless, radical, or terminal peduncles. 

 Calyx variously divided. Corolla 2-lipped, projecting at the 

 base into a pouch or spur. Stamens 2. Ovary and capsule 

 1 -celled, with several seeds attached to a central placenta. 



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 Scrophulariacece, next to which they might perhaps be better 

 placed, although the ovary and capsule are those of Primulacece, with 

 which botanists more generally associate them. 



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

 Calyx 2-lobed. Leaves floating, much divided . . . .2. UTKICULAUIA. 



I. PINGUICULA. BUTTERWORT. 



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 2 lips. Corolla spurred, with a broad, 

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

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



The genus is limited to the northern hemisphere, with the excepting 

 <?f one Fuegian speciff, 



