,] CXXII. EUPHORBIACE^ (BROWN). 491 



1 ft. high); flowering branches 3-6- 

 (usually 4-5-) angled. 

 Spines 4-8 lin. long, almost black ; branches 



apparently not constricted into segments 138. E. nigrispina. 

 Spines ^-4 lin. (or very unequal and some- 

 times 1-9 lin.) long, grey; branches 

 sometimes irregularly constricted into 

 more or less evident segments. 

 Spines \-l lin. long, absent from the 



older parts of the branches . . 150. E. quinquecosiata. 



Spines uniformly 3-4 lin. long; stem- 

 teeth with a very short abrupt slope 

 above the spines and a long aXo^e below 

 them ...... 148. (See under E. griteola.) 



Spines sabequal and 1-3 lin. long or in 

 153, E. infausta, and 155, E. Thi, 

 very unequal on the same stem and 

 up to 9 lin. long; stem-teeth (when 

 prominent) about equally sloping 

 above and below the spines (see 

 also 195, E.francJciana). 

 Capsule on a pedicel shorter or scarcely 

 longer than the involucre. 

 Styles lf-2 lin. long, united for 

 nearly or quite half their 

 length ; involucre about 2 lin. 

 in diam. 

 Spines 1-2^ lin. long, not very 



unequal, often curved upwards 149. E. polyacantha. 

 Spines 1-9 lin. long, very unequal 



on the same branch, straight . 155. E, Thi, and var. 

 Styles shortly united at the base 

 only or for not more than ^ of 

 their length. 

 Horny border narrowed and not 

 more than \ lin. broad between 

 the spine-pairs; involucre 2+ 



lin. in diam. . . \ 139. E. quadrangularis. 



Horny border scarcely narrowed 

 and f-f lin. broad between the 

 spine-pairs ; involucre 1:^—1^ 

 lin. in diam. . . . 153. E. infausta. 



Capsule far exserted on a pedicel 2-3 

 times as long as the involucre; 



involucre l^-lf- lin. in diam. . 135. E. heterochroma. 

 ***Spine-8hield8 quite separate or, in a few 

 species, sometimes separate, sometimes 

 united into a continuous horny margin to 

 the angles, even on the same stem. 

 fPlant evidently more than 1 ft. high, some- 

 times a tree 10-25 ft. high. 

 Ultimate brancblets very much recurved 



orhooked,3-angled, twisted . « , IhQ. E. Bohecchii. 

 Ultimate or flowering branches ascending 

 or spreading, not recurved. 



