CL. X.] DECANDRIA. 191 



petals. Annual : flowers in July and August : grows in watery places 

 in Enghnd : rare. Near Callander, Scotland. E. tripetala of Eng. Ft. 

 vol. ii. p. 243. Eng. Eot. vol. xiv. pi. 955. 623. 



2. E. Hydropiper. Small Octandrous Water-wort. Leaves opposite, 

 spathulate ; flowers octandrous, with four petals ; capsule four-celled. 



Annual : flowers in August : grows at Llyn Coron, in Anglesea, 



where it was discovered by Mr. J. E. Bowman in 1830. Hooker. Eng. 

 Bot. SuppL pi. 2670. Brit. FL 4th ed. p. 166. 624. 



CLASS IX. ENNEANDRIA. 



Plants bearing Flowers with Nine Stamens. 



Order I. HEXAGYNIA. Six Pistils. 

 1. BU'TOMUS. Calyx none. Petals six. Capsules six, many-seeded. 



ENNEANDRIA. HEXAGYNIA. 



1. BU'TOMUS. FLOWERING RUSH. 



Calyx none. Petals six, egg-shaped, withering, the three outer 

 smaller and more acute. Filaments awl-shaped, shorter than the 

 corolla, six in the outer row, three in the inner ; anthers oblong, 

 two-celled, two-valved. Germens six, oblong, tapering, ending 

 each in a style; stigmas simple. Capsules six, oblong, tapering, 

 one-celled, one-valved. Seeds numerous, oblong. Named from 

 bous, an ox, and temno, to cut. 220. 



1. B. umbelldtus. Common Flowering Rush. Root tuberous. Leaves 

 erect, narrow, acute, all radical. Scape longer than the leaves, round, 

 smooth, terminating in an umbel of beautiful rose-coloured flowers. 

 Perennial: flowers in June and July: grows in ditches, pools, slow 

 rivers, and lakes, in England and Ireland. Eng. Bot. vol. x. pi. 651. 

 Eng. FL vol. ii. p. 245. 625. 



CLASS X. DECANDRIA. 



Plants bearing Flowers with Ten Starnens. 



Order I. MONOGYNIA. One Pistil. 



* Flowers ivith more than one petal. 

 1. MONO'TROPA. Petals varying in number, bulging at the base. 



Anthers one-celled, two-valved. 



4. PY'ROLA. Petals five. Anthers two-celled, opening with two 

 pores. 



