6U6 CXXI1, EUPHORBIACE (BROWN). | Dichostemma. 
stamens, and an inner series of 4 alternating with the outer and converted into 
glands, surrounding in some of the terminal involucres a perfect female flower, in 
the others a very rudimentary abortive female flower, reduced to a very short. solid 
square central body. 
1. D. glaucescens, Pierre in Bull. Soc. Linn. Paris, 1896, 1260, A 
small slender tree (Bates), said to be climbing (Pierre), 18—25 ft. high, with 
milky juice. Leaves alternate, coriaceous, glabrous, apparently shining 
above, with or without (at least not always visible on dried specimens) & 
glaucous bloom beneath; petiole }-} in. long; blade 23-6} in. long, 
1-21 in. broad, oblong, elliptic-oblong or slightly obovate-oblong, 
abruptly to somewhat gradually acuminate into an obtuse linear tail- 
like point }-4 in. long at the apex, acutely or roundedly cuneate at the 
base; midrib impressed above, prominent beneath ; primary. veins 6-8 
on each side of the midrib, connected in a series of broad loops 1-2 hin. 
from the margin, prominent beneath. Panicle terminal 3-16 in. long, 
pyramidal with numerous branches or (on weak shoots) corymb-like 
with few branches, all parts, including the involucres, covered with 
minute dense and somewhat powder-like but persistent tomentum, or 
‘the branches becoming more or less glabrous ; branches usually 2-4} in. 
Jong, smaller on weak specimens, 2-4 times forked, ascending oF 
ascending-spreading. Bracts falling off before the involucres mature, 
leaving conspicuous opposite scars, deeply concave-oblong, obtusely 
rounded at the apex, 1-14 lin. long, 1 lin. broad. Involucres of @ 
panicle all male or the terminal one of some of the branchlets bisexual, 
cup-like, obtusely 4-angled, truncate, about yy in. deep and 3-5 
square when fully expanded, green (Bates), when dried slightly fulvous 
or greyish-brown, with the partition-like glands blackish. Male flowers 
glabrous ; perianth } lin. long, cup-like, slightly and irregularly toothed. 
Female flower erect from the centre of the involucre on a stout pedicel 
+1 lin. long, everywhere covered with minute tomentum like that on 
the involucre; perianth very shortly cupular, about 4 lin. long, obtusely 
4-angled, truncate, minutely ciliate; ovary obtusely 4-angled ; styles 4, 
stout, recurving over the top of the ovary, channelled on their upper 
side, emarginate or shortly bifid at the apex. Fruit 3-3 in. long an 
1-1} in. in diam., depressed, with 4 obtusely rounded lobes, wah 
with minute tomentum, brown or dull purple. Seeds ellipsoid or su 
globose, 5-5} lin. long, 4-5 lin. thick, smooth, without a caruncle, 
brown.—D. amplum, Pax in Engl. Jahrb. xliii, 325. Dichostema 
Zenkeri, Pax in Engl. Jahrb. xxviii. 25. , 
Upper Guinea. Cameroons: Bipinde, Zenker, 1774! 1842! 2564! 25644: 
3012! 3549! : 
_ ower Guinea. Gaboon: Munda; Sibange Farm, Soyauz, 126! Libreville, 
Klaine, 281! 1221! Angom, Bates, 555! hay 
South Central. Belgian Congo: Yambuya, on the River Aruwim, 
Mildbraed, 3306 ! : 
The dense indumentum on the inflorescence, although somewhat powder-like, 
does not rub off. It does not consist of hairs or powder, but of very minute glo tion 
inflated cells, as seen under a compound microscope. I can find no distinc 
