Bichostemiiia.] cxxii. euphorbiace.k (ukuwn). j;07 



whatever betweiMi D. glaucescens and D. Zenkeri. Witli regard to D. ampliim, 

 some misfc.ike in measureinent must liave been intide, as Dr. Pax b;ises it< distinction 

 upon its l;irger inv;)lucres and loosur inflore-icoiice. llie involucre is describeil as 

 "8-9 nun." (about 4 lin.) in diani. By the comtesv of the Ufrlin authorities I liavc 

 been able to examine the type specin)en, and find the invohnre is not more tlrnji 

 5 mm. (2-^ lin.) square wlien fully expanded and not any larger than the fully 

 expanded involu(!res of the type of D. glanceacenn, in whieli they are mostly 

 immature, and consecpiently sm dler. The panicle is more lax and its bvanelies more 

 spreading in D. arnplum than in the t\])e of D. f/laucescens, hut ditterent s])ccimens 

 vary in this character and I cm find nothing else either in stem, leaf, or tlowers to 

 distinguish their. 



7. ANTHOSTEMA, A. Juss. ; Benth. et Hook. f. Gen. PI. iii. 2<)1. 



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 dor.sally it 

 appears 4 lobed, enclosing 4 involucres containing stamens (male flower.'^) 

 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 

 7-13 (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-(rare1y 4-)]obed ; 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 subtriincate 

 stigmatic tips. Fruit as in Euphorbia, 3-lobed. — Trees. Leaves alter- 

 nate, entire ; stipules not seen, apparently very deciduous, leaving a 

 small or indistinct scar. Cymes axillary, small, subses.sile, rather dense, 

 much-branched, with small opposite often deciduous bracts and the 

 flowering bracts connate in groups of 4, enclosing the m.ale 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, cnnrate at the base, with a curved 



outline to the margins . . . . . .1. A. s-me/jdleuse. 



Leaves oblong, rounded at the base, with jiaralld mar<;ius 2. A. aithrj/ .imin. 



1. A. senegalense, A. Juss. Euphorh. Gen. Tent. 57, t. IS, Jig. (JO. 

 A tree. Branches glabrous. Leaves alternate, thinly coiiaceous, 

 glabrous, not shining above; petiole ^-^ in. long; blade 3-5 in. long, 

 l^-l|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 

 above, prominent beneath ; veins numerous, very widely spreading, very 

 slightly prominent beneath. Cymes axillary, sessile, -J-J in. in diam., 



