Ord. 1.] DECANDRIA MONOGYNTA. 87 



Margins of ponds and ditches, rare. 0. 7, 8. Minute, procum- 

 bent. Fl. axillary. Pet. rose-col. 

 *2. E. Hydropiper, Suppl, 2670. (Small Octandrous W.) Leaves 

 opposite, spathulate. Flowers alternate, sessile, erect, octan- 

 drous, 4-petaled. Calyx shorter than the petals ; segments ligu- 

 late. Capsule roundish, depressed, 4-celled. Seeds 16 in each 

 cell, much curved. 



Llyn Coron. Anglesea. 0. 8. 



Class IX. ENNEANDRIA. Stamens 9. 



Order I. HEXAGYNIA. Styles 6. 

 224. BuTOMUS. Cal 0. Pet. 6. Caps. 6, with many seeds.— 



N.O. BUTOME^E. 



ENNEANDRIA HEXAGYNIA. 



224. BuTOMUS. Flowering-rush. 



1. B. umbettdtus, 10. 651. (Common F.) 



An aquatic herb. V-. 6, 7. Leaves linear, 3-sided. Stalk simple, 

 3 or 4/, bearing a large umb. of rose-col. flowers. 



Class X. DECANDRIA. Stamens 10. 

 Order I. MONOGYNIA. Style 1. 



* Fl. of several petals. 



225. MONoTROPA. Pet. 10, or 8 ; the 5, or 4 f outermost pro- 



tuberant at the base. Anth. of 1 cell and 2 valves — N.O. 



MoNOTROPEiE. 



228. PfROLA. Pel. 5. Anth. of 2 cells, with 2 pores — N.O. 

 Monotrope^:. 



** Fl. of 1 petal, equal. 



226. ANDRoMEDA. Cor. ovate, or bell-shaped. Caps, of 5 cells. 



— N.O. EricejE. 



227. ARBUTUS. Cor. ovate, transparent at the base. Berry of 5 



cells. — N.O. Erice^e. 



Vaccinium 1,2. Menziesia 1. 



