Tdmus.~\ 
XCIII. TRILLIACEVE. 
445 
** Leaves with netted veins. (Orel. XCII.) 
Obd. XCII. DIOSCOHEACEiE It. Brown. 
Dioecious. Limb of the perianth with 6 divisions. — Sterile fl. 
Stamens 6 from the base of the perianth. — Fertile Jl. Ovary 
3-celled; cells 1 — 2-seeded. Style deeply trifid. Stigmas un- 
divided. Fruit dry and Hat, with 2 of its cells frequently 
abortive, or (in Tamus ) baccate. Embryo small, near the 
kilum, lying in a large cavity of cartilaginous albumen. — Stems 
twining, shrubby or herbaceous, mostly tropical. Leaves with 
reticulating veins. Flowers small, bracteate. — Dioscorea sativa 
affords the well-known yam. 
1. Tamijs Linn. Black Bryony. 
Barren fl. Perianth single, in 6 deep segments. — Fertile fl. 
Perianth single, in 6 deep segments, contracted at the neck. 
Stigmas 3. Berry of 3 cells. — Name : supposed to be the uva 
taminia of Pliny, or black bryony. 
1. T. communis L. ( common B.) ; leaves undivided cordate 
acute. E. B. t. 91. 
Hedges and thickets, England. 2/ . 5, 6. — Root very large, 
acrid, black externally, fleshy. Stems long, twining, and reaching 
among trees and bushes to a great distance. Flowers yellowish- 
green, small. Berry red. 
Div. II. Ovary superior, free, not adnate with the tube of the 
perianth. (Ord. XCIII. — CV.) 
* Perianth conspicuous. Seeds with albumen. (Ord. XCIII. — 
XCVII.) 
Ord. XCIII. TRILLIACE2E De Cand. 
Flowers perfect. Sepals 6 — 10 (rarely 4), outer ones her- 
baceous ; inner herbaceous or much larger and coloured, rarely 
wanting. Stamens 6 — 10. Anthers linear, the cells fixed one 
on each side near the middle or the apex of a subulate filament. 
Ovary free, 3 — 5-celled, with as many distinct styles. Stigmas 
inconspicuous. Ovules numerous, in 2 rows in each cell, as- 
cending. Fruit succulent, 3 — 5-celled. Seeds numerous ; the 
skin brownish, leathery. Albumen fleshy, with a minute em- 
bryo close to the hilum. — Stems simple, herbaceous. Leaves 
sessile, verticillate, thin, ivith netted veins, not articulated with 
the stem, marcescent. Flowers large, terminal, solitary. 
