450 CXXII, EUPHORBIACEE (BROWN). | Stenadenium. 
Mozamb. Distr. German East Africa: Ionia Mountain, near Lake Rukwa, 
5000 ft., Goetze, 1099! 
Described from the type, kindly lent to Kew by the Berlin authorities. 
2. MONADENIUM, Pax in Engl. Jahrb. xix. 126. 
Apparent flower consisting of a cup-like involucre, truncate at the top 
and open on one side to or below the middle, with a continuous gland 
around its top margin to the opening, exceeding or as long as the interior 
series of 5 membranous quadrate fringe-toothed erect lobes. Stamens 
(really male flowers, as in Huphorbia, without a perianth) arranged in 
groups opposite the lobes of the involucre, sometimes mingled with a 
few filiform glabrous bracteoles and the groups separated (always ?) by 
deeply fringed-toothed membranous glabrous partitions. Ovary (really 
a female flower, as in Zuphorbia, with the perianth reduced toa mere rim 
or of 3 small deltoid acute lobes) pedicellate, surrounded by the stamens, 
exserted from the opening in the side of the involucre and recurved, 
3-celled, with one ovule pendulous from the apex of the inner angle of 
each cell; styles 3, free or connate below, very shortly to deeply bifid ; 
stigmas often thickened. Capsule obtusely or subacutely 3-angled, with 
or without a double crest along the angles. Seeds oblong, 4-angled, 
truncate at each end, carunculate.-—Dwarf perennials 3 in. to 2 ft. 
high, with perennial cylindric thick succulent stems or with a tuberous 
(or woody ?) rootstock and erect annual herbaceous or subfleshy stems. 
Leaves alternate, more or less fleshy, rigid when dried, with very small 
or rudimentary stipules. Peduncles at first often bearing but one 
nodding amply bracteate involucre, ultimately developing cymes with 3 
or more bracteate involucres, solitary in the axils of the uppermost leaves 
or maturing after the leaves have fallen at the apex of the stems. 
Bracts usually connate in pairs into one oblique cup-like body (bract-cup), 
with overlapping or gaping margins enclosing the solitary involucres oF 
embracing the branchlets at the forkings and the involucre in the fork 
of the cyme, all on one side of it, emarginate or notched or deeply 
lobed at the apex and often 2-keeled on the back, rarely quite free. 
Species 23, all endemic. 
Cymes produced from the tuber, on peduncles less 
than 1 in. long ss F is : . 23, M. simpler. 
Cymes produced from the upper or terminal part of 
the st»ms. 
*Stems perennial, stout, fleshy, cylindric, glabrous. 
Stems (or branches?) with slightly prominent 
leaf-scars in spiral series, having 1-2 black 
glands beside them and 1 in their axils, not - 
tessellate . B ‘ : : : . 6, M. Ellenbecktt. 
Stems with rhomboid or 6-angled tessellations 
or tubercles in spiral series, without glands. 
Tubercles or tessellations with 1-6 very small 
spines or prickles under or around the leaf- 
shia or base of the leaf, sometimes obso- 
ete. 
