Dichostemma. | CXXII, EUPHORBIACEX (BROWN). 607 
whatever between D. glaucescens and D. Zenkeri. With regard to D. ampluin, 
some mistake in measurement must have been made, es Dr. Pax bases its distinction 
upon its larger involucres and looser inflorescence. ‘he involucre is described us 
“8-9 mm.” (about 4 lin.) in diam. By the courtesy of the Berlin authorities I have 
been able to examine the type specimen, and find the involucre is not more than 
5 mm. (24 lin.) square when fully expanded and not any larger than the fully 
expanded involucres of the type of D. glaucescens, in which they are mostly 
immature, and consequently smaller. The panicle is more lax and its branches more 
spreading in D. amplum than in the type of D. glaucescens, but different specimens 
vary in this character and I cin find nothing else either in stem, leaf, or flowers to 
distinguish them. 
7. ANTHOSTEMA, A. Juss.; Benth. et Hook. f. Gen. Pl. iii. 261. 
Flowers unisexual, one or a few females in each cyme or the cymes 
entirely male. Common involucre terminating each cyme-branch, 
composed of 4 bracts bearing large rhomboid flattened glands on their 
infolded margins and more or less united at their sides, so that dorsally it 
appears +-lobed, enclosing 4 involucres containing stamens (male flowers) 
and spreading in half a circle, with or without a single ovary (female 
flower) on the inner side of its base. Involucre of male flowers consisting 
of 7-13 (often 8) free bracts in 2~3 series, with the 3-4 outer larger and 
enclosing the others, all with inrolled or incurved margins. Male flowers 
‘13 (often 8) in each involucre, each consisting of a single stamen with 
a cup-like perianth at its base, jointed to the pedicel and soon falling 
away from it; anthers as broad or broader than long, 2-celled, opening 
longitudinally. Female flowers solitary, not enclosed in an involucre, 
shortly pedicellate ; perianth cup-like, 3-(rarely 4-)lobed ; ovary 3-angled, 
3-celled, with a solitary pendulous ovule in each cell; style stout, with 
3 short spreading branches, slightly thickened at the entire subtruncate 
stigmatic tips. Fruit as in Luphorbia, 3-lobed.—Trees. Leaves alter- 
nate, entire; stipules not seen, apparently very deciduous, leaving a 
small or indistinct sear, Cymes axillary, small, subsessile, rather dense, 
much-branched, with small opposite often deciduous bracts and the 
flowering bracts connate in groups of 4, enclosing the male involucres 
and Spreading in a somewhat fan- or half-saucer-like manner, sometimes 
on one side of a female flower. 
Species 3, one in Madagascar. 
Leaves elliptic-oblong, cuneate at the base, with a curved 
outline to the margins : : 1. A. senegalense. 
Leaves oblong, rounded at the base, with parallel margins 2, A. aubryanum. 
| ae. senegalense, 4. Juss. Huphorb. Gen. Tent. 57, t. 18, fig. 60. 
A tree. Branches glabrous. Leaves alternate, thinly coriaceous, 
glabrous, not shining above; petiole 4-2 in. long; blade 3-5 in. long, 
1}-13 in. broad, oblong-elliptic or oblong-lanceolate, acuminate (some- 
times somewhat abruptly) into an obtuse or acute point, broadly or 
acutely cuneate into the petiole at the base ; midrib slightly impressed 
a ve, prominent beneath ; veins numerous, very widely spreading, very 
“'shtly prominent beneath. Cymes axillary, sessile, }-} in. in diam., 
