WILLOW-HERB FAMILY 



rose-coloured. — By mountain streams in the north. — Fl. July, 

 August. Perennial. 



12. E. anagallidifblium (Alpine Willow- Herb). — A still smaller 

 form, with slender, not succulent stem ; obtuse, pale green leaves ; 

 and i — 3 pale rose-coloured flowers drooping in bud. — In similar 

 situations to the preceding. — Fl. July. Perennial 



CENOTHgRA biennis {Common Evening Primrose). 



These plants are by no means easy to distinguish ; they vary 

 considerably in many of their characters, and, where two species 

 grow near to one another, hybrids between them occur frequently. 



2. Ludwigia (Isnardia). — Herbs with entire leaves; axillary, 

 solitary, bracteate flowers, usually 4-merous ; sepals 3 — 5, 

 persistent j petals 3 — 5, or absent ; stamens 3 — 5 ; ovary 3 — 5- 



