Euphorbia.'] cxxii. euphorbiace.e (brown). 489 



Ovary with 2 styles, 2-celled ; in- 

 volucre about 4 lin. in diam. . 180. E. bilocularis. 

 Ovary with 3 styles, 3-celled (unknown 

 in 182, E. ErythrcBce). 

 Wing-like angles of flowering 

 branches much broader than 

 the central solid part is thick 

 (see also 184, E. Barteri, which 

 may perhaps have branches 

 2 in. or more in diam.). 

 Branches 7- (perhaps sometimes 

 fewer) angled; peduncles 3-4 



lin. long .... 181. E. aerurensis. 



Branches 4- (perhaps sometimes 

 5-) angled; peduncles 6-9 lin. 



long 183. E. calycina. 



Wing-like angles of the 5-7-angled 

 flowering branches not broader 

 than the central solid part is 



thick 182. E. ErythrcBce. 



[See also 169, E. Murieli, which 

 may perhaps have branches 2 in. 

 or more in diam.] 

 Tlowerlng: branches (dried) 1 ^-l| In. in 

 diam. (see also 182, E. Erythrcece, and 195, 

 E.J'ranckiana). 

 Spines 4-9 lin. long; branches deei)ly constricted 

 into many elliptic or orbicular segments 1-1^ 

 in. long and lr,-]|- in. broad (see also 151, 

 E. opuntioides) ...... 152. E. helHca. 



Spines 2-9 lin, long, very unequal on the same 

 stem ; brandies wit)» irregular and usually 

 not very deep constrictions. 

 Flowering branches 4-6-angIed; spine-shields 

 nnited into continuous horny margins to the 

 angles ....... 155. E. Thi. 



Flowering branches 3-angled; spine-shields not 

 united into continuous horny margins to the 

 angles ....... 156. E. huniana. 



Spines 1-4 lin. long, subequal or not very unequal 



on the same stem, absent in 169, E. Murieli 



(always?); flowering branches 3-4-angled 



(see also 175, E. confertijlora). 



Spine-i)airs with a pair of recurved prickles or 



hooks at their base 187. E. plafi/iicnullm. 



Spine-pairs with or without a pair of minute 



straight (not recurved) prickles or points at 



or near their base. 



Stem-angles distinctly sinuate-toothed along 



the margins ; flowering-eyes separate 



from tlie si)ine-shields or occasionally 



connected with them by a horny border. 



Leaves -2-^^ i'^- lo"&» oblanceolate or 



spathulate-oblanceolate, soon deciduous ; 



spine-pairs {-h in. apart . ISO. E. herment iana. 



