DODECANDRIA. 
571 
F. two, in a four-lobed, pricldy involucre: Perianth 
single, four or five-cleft: Styles three: Nuts one- 
seeded, invested with the enlarged involucre. Hook. 
Grev. E.) 
(CASTA'NEA. Flowers B. and F. on the same plant: Bloss. 
none. 
B. in a long cylindrical catkin: Perianth single, 
of one leaf, six-cleft: Siam, five to twenty. 
F. three, within a four-lobed, prickly involucre : Pe¬ 
rianth single, five or six-lobed: Styles six: Nut 
one or two-seeded, invested with the enlarged invo¬ 
lucre. Hook. Grev. E.) 
RESE'DA. Bloss. petals many-cleft: Cal. divided: Caps. 
one-celled, gaping. 
EUPHOR'BIA. ( Perianth single, monophyllous, inferior: 
Nectaries [petals, Linn.) four or five, inserted upon the 
perianth : Siam, jointed : Caps, pedicellate, three-lobed. 
Hook. E.) 
(Involucrum with numerous B. and one F.jl. 
B. Cal. none : Cor. none. 
F. Cal. none: Cor. none : Caps, three-lobed: Styles 
three, cloven. Sm. E.)* 
TETRAGYNIA. 
[Tormentilla erecta.] 
HEXAGYNIA. 
£Sedum dasyphyllum.] 
DODECAGYNIA. 
SEMPERVPVUM. Bloss. twelve petals: Cal. with twelve 
segments : Caps, twelve. 
^Thalictrum alpinum.] 
* (For a succinct statement of the reasons for arranging the genus Euphorbia under 
Monoecia Monandria, see vol. 1. p. 245. 249. E.) 
