Euphorbia.] cxxii. eupiioubiace^ (brown). 581 



angled, constricted at intervals into oblon^ij or suborbicular joints 

 J-1 J in. long and J-lJ in. in diam., glabrous ; angles compressed, faintly 

 or deeply sinuate-toothed according to vigour, with continuous horny 

 dark brown or grey borders connecting the spine-pairs; teeth (when 

 prominent) up to 2 lin. long, lJ-4 lin, apart; spines diverging, |-4 lin. 

 long, with or without a pair of minute straight prickles at their base, 

 dark brown, becoming grey. Cymes solitary in the axils of the teeth, 

 seijsiie, with 1-6 involucres. Bracts suborbicular, about 1^ lin. in diam. 

 Involucres sessile, 2-2J lin. in diam., broadly and shaliowly obconic, 

 glabrous, with 5 glands and 5 transversely oblong or subquadrate fringed 

 lobes ; glands |-1 lin. in their greater diam., transversely oblong, entire, 

 2-lipped, in dried flowers often appearing very narrow (transversely) with 

 the lips folded together, yellow. Ovary sessile and together with the 

 united part of the styles included in the involucre, glabrous; styles 

 nej-rly 1^ lin. long, united at the basal third, with recurved-spreading 

 arms, bifid at the apex. Capsule sessile and its base included in the 

 involucre, only seen in an immature state. — E. polyacaittha. Hiern in 

 Cat. Afr. PI. Welvv. i. 1)40, not of Boiss. 



Ziower Guinea. Angola: Huilla; Dekimlt, lOZO \ in ek'Viited rocky places 

 between JiopoUo and Neue, 500 tt., Welivitsch, 640 ! Puiigo Aiidongo; frequent on 

 rocks tluoug-liout tlie Prajsidiuiu, Weltvitsch, 639 ! 



Welvvitseh lias noted on liis liil)el with 639 that tlie i)lantis " 1-1-^ ft, liiirb," but 

 his specimens do not show tliosse proportions, heingonly about 6 in. higli, and appear 

 to me to be conspecific with his 610. 



Pax in Engl. Jahrb. xxxiv. 375 Iims considered this plant to be E. Jieteracantha, 

 Pax, but that species is identical with E. subsalsa, Hiein, and quite distinct from 

 E.fraterna. 



105. E. Thiy ISchweiiif. in Ve^'handl. ZooL-Bot. Gesellsch, Wien, 

 xviii. ()()(). A succulent leafless spiny bush 2-4 ft. high, branching 

 from the base, glabrous in all parts. Branches erect, |-1 J in. (or more i) 

 in diam., 4-0-angled, constricted at intervals of |-2J in. ; angles com- 

 piessed, more or less lobed by the stem-constrictions, with continuous 

 horny dark grey margins. Spines very unequal on the same stem, stout, 

 some 2-3 lin. long, others 4-U lin. long, in pairs 2-G lin. apart, straight, 

 diverging, dark grey. Cymes solitary in ihe axils of the spines, sub- 

 sessile, with 8 involucres. Ikacts |-1 lin. long, broadly ovate, obtuse. 

 Involucres about 2 lin. in diam., cup-shaped, with 5 glands and 5 

 broadly cuneate fringed lobes ; glands about £ lin. in their greater diam., 

 transversely oblong, entire. Ovary oblong-trigonous, much longer than 

 broad, with a very short pedicel; styles about 1| lin. long, united for 

 almost half tlioir length, with recurved-spreadtng arms bifid at the apex, 

 the ovary and half of the united part of the style included in the 

 involucre. Capsule^ with the exception of its base, exserted, 1^ lin. in 

 diam., globose-trigonous. Seeds | lin. long, ellipsoid, with the inner 

 face obscurely angular and marked with a brown median line, minutely 

 scrobiculate-tuberculate, brown. — Pax in Engl. Jahrb. xxxiv. 77, partly ; 

 Berger, Sukk. Euphorb. 63. 



N"lle Iiand. Nubia; between Suakin and lierl)cr ; in Wady Hamtrcb, 

 Schivfinfitrfh, 832 ! and at Siii<rat, Srhweinfurth, 211 ! 



