£60 CXXII. EUPHORBIACEE (BROWN). | Monadenium. 
Jobes, 2-keeled down the back, rather thick in substance, with a very 
minute puberulence, apparently green, veined with darker green at the 
upper part. Involucre a little shorter than the bract-cup, 2-23 lin. 
long, cup-like, open to half-way down in front, with an erect entire 
slightly thickened margin, glabrous, slightly exceeding the quadrate 
fringed-toothed inner lobes. Ovary exserted, reflexed, smooth, very 
minutely papillate-puberulous, with a double crisped (always ¢) keel along 
each angle and a perianth at its base with 3 rounded or ovate lobes 
4-} lin. long; styles united to the middle; stigmas thickened. 
. ile Land. British East Africa: Kibwezi, Kassner, 717! Simba, Kassner, 
429! 
18. M. herbaceum, Paw in Engl. Jahrb. xlv. 241. Stem annual 
from a tuberous rootstock, 2 ft. or more high, 4 in. thick at the base, 
herbaceous, glabrous. Leaves erect, thinly coriaceous, 14-23 in. apart, 
those at the middle of the stem, 2-2} in. long, }-5 in. broad, lanceolate 
or the upper gradually smaller and becoming linear-lanceolate, about 
equally narrowed from the middle to an acute apex and a cuneate sessile 
base, entire, with the midrib acutely keeled beneath, glabrous on both 
sides. Cymes small, 2-3 in. long, including the }-} in.-long erect or 
ascending peduncles, arising from the axils of reduced leaves }-3 in. long 
at the apex of the stem and forming an ovoid raceme 1-1} in. long, 
scarcely nodding, glabrous in all parts ; peduncles broader than thick, 
with a wing on each side and 1-3 keels or ridges on the convex faces 
between. Bracts free to the base, not overlapping at the margins, }-} in. 
long, 3-} in. broad, elliptic, elliptic-ovate, or suborbicular, acute or 
obtuse and apiculate, with a wing-like keel down the back, rather thin, 
apparently green suffused with rosy, with the veins sometimes scarcely 
evident, at others sub-conspicuous. Involucre } in. long, open half-way 
down the front, with an erect slightly thickened entire margin, overtop- 
ping the quadrate fringe-toothed inner lobes. Ovary exserted and 
reflexed, smooth, grooved down each angle, with a perianth of 5 minute 
scarcely evident rounded lobes ; style trifid to the middle or below, with 
the branches shortly bifid ; stigmas slightly thickened. 
South Central. Belgian Congo: in a swamp at Luente, Kassner, 2489! 
19. M. Gossweileri, V. #. Br. Stem probably annual from @ 
perennial rootstock, 3 in. long in the type, but perhaps taller, 2-3 lin. 
thick when dried, perhaps somewhat fleshy, glabrous, greyish, with a 
scurfy appearance from shrinkage. Leaves 3-1} in. long, }-} in. broad, 
or perhaps larger, fleshy, oblanceolate-obovate, subacute, cuneately taper- 
ing from about } below the apex into a short petiole, more or less cren™” 
date and somewhat crisped-undulate on the margins, glabrous on both 
sides; midrib flat above, with a conspicuous wing-like minutely denticu- 
late keel beneath. Cymes in the axils of the upper leaves, about 1} in. 
lon g, once or twice forked, with the peduncles and main branches ea¢ 
5-6 lin, long. Bract-cup about 4 lin. long and as much or more in dials 
lobed behind, with two keels down the back, probably green, with 
distinctly forked venation, lobes very obtusely rounded at the apex, 
