PLORA OF MADAGASCAR. 517 



|-1 in. long, composed of two unequal oblong lobes reaching 

 down nearly to the base. Styles reaching in the flowering-stage 



to the tip of the involucre. Male flowers much shorter. — Baron 

 4772 ! 4792 ! This very curious plant merits further investiga- 

 tion. The genus PecUlanthus is exclusively American. 



Euphorbia (§ Arthrothamj^us) alcicoris-is, n. sp. 



Fruticosu, erecta, aphylla, multoties dichotomiter ramosa, ramulis strictis 

 erecto-patentibus basi solum articulatis, capitulis ad ramorum apices 

 glomeratis^ bracteis parvis ovatis, involucro parvo campaaulato, appendi- 

 cibus 7-*^ erectis cuneatis. 



An erect leafless shrub many times dichotomously forked; 

 main stems terete, ^ in. in diam. ; penultimate branchlets 2-3 in. 

 long ; ultimate shorter, subterete, | in. in diam. Heads clustered 

 9,t the tips of the branchlets ; bracts ovate, minute. Involucre 

 ^ in. in diam., crowned by 7-8 erect small cuneate emarginate 

 fleshy green appendages. — Baron 4875 ! 



Euphorbia (§ Goniostema) orthoclada, n. sp. 



Fruticosa, ramis carnosis cylindricis elongatis, foliis sparsis alternis 

 sessilibus oblanceolatis obtusis subcarnosis, cymis terminalibus oligocepha- 

 lis, involucre campanulato biacteis 2 fuhaceis orbiculari-cuneatis stipato 

 appendicibus 5 orbicularibus integris patulis pra^dito, ovario seminibusque 

 lajvibus glabris. 



A shrub, with long cylindrical fleshy unarmed branchlets. 

 Leaves placed all down the branches, erecto-patent, fleshy, I5-II 

 in. long, i in. broad. Heads arranged in dense cymes at the ends 

 of the branches, each subtended by a pair of foliaceous bracts 

 I in. long. luvolucre \ in. in diam. Fruit-carpels \ in. long. 

 Seeds large, oblong-quadrate. — Baron 3555 ! 



Euphorbia (§ Gtonigstema) Bakertaiva, Baill. in Bull. Linn. 

 Soc. Par. p. 623. 



Arborea, ramosissima, ramulis gracilibus teretibus lignosis, foliis ad 

 ramorum apices subconfertis petiolatis oblongis cuspidatis subcoriaceis, 

 cymis axillaribus oligocephalis, bracteis parvis foliaceis ovato-lanceolatis, 

 involucro parvo campanulato appendicibus 6 patulis integris orbicularibus. 



A much-branched tree, glabrous in all its parts, with slender 

 terete branchlets. Leaves 1-1 1 in. long, conspicuously cuspidate, 

 firm in texture, green and glabrous on both surfaces, with few 

 indistinct crecto-pateut main veins. Cymes axillary, shortly 



