544 



THE PRIMROSE FAMILY. 



V. TRIENTALE. TRIENTALIS. 



A single species, only distinguished from Lysimachia by a some- 

 what different habit, and by the parts of the flower being usually in 

 sevens instead of in fives, although these numbers are not quite con- 

 stant. 



1. Common Trientale. Trientalis europsea, Linn. 

 (Fig. 650.) 



(Eng. Bot. t. 15.) 



Rootstock perennial and slightly creep- 

 ing. Stems erect, simple, 3 to 6 inches 

 high, bearing at the top a tuft or irregu- 

 lar whorl of 5 or 6 leaves, varying from 

 obovate to lanceolate, usually pointed, 

 the largest near 2 inches long, with 2 or 

 3 small alternate leaves below the whorl. 

 From the centre of the leaves arise from 

 1 to 4 slender pedicels, about as long as 

 the leaves, each terminated by a single 

 flower, white or pale-pink, with a yellow 

 ring, rather larger than in the wood 

 Lysimachia. Calyx-segments narrow. 

 Corolla rotate. Stamens with slender 

 filaments, and short recurved anthers. 

 In woods, in northern and Arctic 

 Europe, Asia, and America, reappearing here and there in mountain 

 woods of central Europe. Common in the Scotch Highlands, more rare 

 in the north of England, and unknown in Ireland. Fl. early summer. 



Fig. 650. 



VI. GLAUX. GLAUX. 



A single species, distinguished from all Primulacece by the absence 

 of any real corolla, the coloured campanulate calyx assuming the ap- 

 pearance of one, the stamens alternating with its lobes. Capsule 

 opening in 4 valves. 



1. Sea G-laux. Glaux maritima, Linn. (Fig. 651.) 

 (Eng. Eot. t. 13. Sea Milkwort. Black Saltwort.) 

 A low, decumbent, branching perennial, glabrous and often slightly 

 succulent, from 3 to 4 or 5 rarely 6 inches high, with a more or less 



