PRIMULACE^ 59 



9. Centunculus, L. 



Flowers minute, solitary, axillary ; calyx-teeth, corolla- 

 lobes, and stamens each 4-5 ; leaves usually opposite ; 

 capsule splitting horizontally. Not alpine. 



C. minimus, L. ; a very small plant with minute white 

 or pink flowers, and small ovate glabrous sessile leaves ; 

 wet places, rare ; Switzerland, Jura, Pyrenees. 



10. Trientalis, L. 



Flowers solitary, white, on slender erect flower-stalks ; 

 calyx-teeth, corolla-lobes and stamens each 5-9 ; leaves 

 in whorls of 5-7 ; capsule splitting into five valves. 



T. europcza, L. (Fig. 82) ; flowers 1-4, from a whorl of 

 5-7 leaves, calyx-teeth linear, leaves ovate, shining ; sub- 

 alpine heaths; very rare; Switzerland, Southern Tirol, 

 Carniola, Pyrenees. 



II. Samolus, Tourn. 



Flowers small, white, in terminal racemes or corymbs ; 

 stamens 5; ovary ^-inferior ; seed-vessel a 5-valved cap- 

 sule. Not alpine. 



6". Valerandi, L., Brookweed ; stem partially prostrate, 

 leaves obovate, entire, mostly alternate ; wet places, rare ; 

 Valais, Jura, Vosges, Pyrenees. 



Order LIIJ.— APO'CYNACE^. 



Flowers regular; calyx usually 5 -toothed; corolla 

 usually 5-lobed, lobes oblique, contorted in bud; stamens 

 usually 5 ; ovary 2-celled; seed-vessel usually of two many- 



