462 CXXI. EUPHORBIACE£ (BROWN). | Monadentum. 
Imperfectly known species. 
22. M. Descampsii, Pax in Bull. Soc. Bot. Belg. xxxvii. 108. 
Stems fleshy. Leaves sessile, up to 1} in. long, } in. broad, linear, pale 
green, Flowers in cymes; bracts free, ovate, acute, with a wing-like 
keel 3 lin. broad down the back, reticulated, reddish. Involucre cylin- 
dric, with the gland overtopping the lobes. Ovary glabrous. 
South Central. Belgian Congo: between Lake Tanganyika and Lake Moero, 
Descamps. 
23. M. simplex, Pax in Bull. Herb. Boiss. vi. 743. Tuber oblong. 
Leaves unknown. Cymes produced from the tuber; peduncles 7-10 
lin. long. Bracts subcordately lobed. Involucre about } in. long, 
scarcely exceeding the inner lobes. Ovary glabrous. 
Lower Guinea. Angola: Benguela; ona sandy plain at the sources of the 
River Lulua, without collector’s name, in Montpellier Herbarium. 
There is probably some error with regard to the cymes being produced direct 
from the tuber, they are probably on a short leafy stem, from which the leaves have 
fallen away, as in most other species. 
3. SYNADENIUM, Boiss. ; Benth. et Hook. f, Gen. PI. iii. 261. 
Apparent flower consisting of an entire shallowly cup- or saucer-like 
involucre, with a very spreading or more rarely erect rim-like gland 
outside of and completely surrounding an inner series of 5 inflexed- 
erect membranous subquadrate fringe-toothed lobes; gland usually entire, 
occasionally having a cut-like notch on one side or divided by 2-5 cut- 
like notches into unequal or equal segments, but not forming equally- 
spaced separate glands. Stamens (really male flowers, as in Huphorbia, 
without a perianth) arranged in 5 groups, contained in 5 compartments 
with membranous walls opposite the lobes of the involucre. Ovary 
(really a female flower, as in Huphorbia, with the perianth reduced toa 
rudimentary rim or of 3 minute or rarely well developed conspicuous 
lobes) pedicellate, 3-celled, often absent; when present central and its 
pedicel surrounded by a membranous tubular involucel, formed by the 
inner wall of the compartments containing the stamens, lobed and fringed 
at the top, puberulous. Styles 3, connate at the basal part; stigmas 
bifid or rarely entire ; ovule solitary in each cell, attached to the inner 
angle at or above the middle of the cell.—Shrubs or small trees, wit 
the young branches fleshy, full of milky juice. Leaves alternate, 
exstipulate, more or less fleshy, coriaceous when dried, cuneately ob- 
ovate, oblanceolate, lanceolate or subspathulate. Inflorescence axillary, 
cymose, cymose-paniculate or umbel-like, with a pair of free persistent 
or deciduous bracts at the base of each involucre and not or scarcely 
exceeding its rim-like gland. 
: Species 18, of which one is a native of Natal. All similar in appearance (as 
dried specimens) and require to be critically examined for determination. From an 
examination of the material available, it is suspected that the species are rather local 
