492 cxxii. EurnoRBiACE.E (brown). [Euphorhia. 



FlovveriDg-brancbes subi-ylindric or sub 

 angular; spine-sliields elongated oh- 

 triangular, with 2 pairs of spines, the 

 larger 1-2 lin. long .... 141. E. Nyasscp. 

 Flowering-branches 3-angled, with 

 irregular and often neck-like con- 

 strictions; spines very unequal, 2-8 

 lin. long . . . . • . 156. ^. buruana. 

 Flowering-branches 3-angled, without 

 constrictions, with regular deltoid 



teeth; spines equal, 2 lin. long . . 158. E. Wakefieldii. 



Flowering branches usually 4-5- (some- 

 times 3-) angled. 

 Spine-shields small, acute or rounded 

 below the spines, but not long- 

 decurrent and linear. 

 Stem-angles (dried) ^ lin. or less 



thick ; spines grey . . . 188. E. quadrialata. 



Stem-angles (dried) f lin. or more 



thick ; spines blackish . . 185. E. garuana. 



Spine-shields decurrent below the 



spines and sometimes extending to 



the flowerijig eye below as a linear 



horny margin to the stem-angles. 



Stem-angles with small rounded 



teeth 2-4 lin. apart; spines 



^-1 lin. long or obsolete. . 150. E. quinquecostata. 

 Stem-angles with very broadly 

 deltoid teeth 5-10 lin. apart or 

 without teeth. 

 •Spine-pairs with a distinct but 

 smaller pair of spines at or 

 1-2 lin. above their base. 

 Stems (dried) 2-4 lin. thick ; 

 larger pair of spines very 

 slender 1-2^ lin. long . 134. E. taitensis. 



Stems (dried) 4-6 lin. thick ; 

 larger ]>air of spines stoutly 

 noedle-like, 2-6 lin. long . 137. E. suhsaUa. 

 Spine-pairs with or without 

 (often on tlie same stem) a 

 pair of minute prickles or 

 points (not distinct spines) 

 at their base or above them. 

 Ovary far exsertcd on a pedicel 

 much longer than the in- 

 volucre .... 135. E. heterochroma. 

 Ovary subse*sile, included in 



the involucre , . . 139. E. quadrangularU. 



++Plant not more (usually distinctly less) than 



1 ft. high (see also 141, E. Nyassce, of 

 which only small bits have been seen, 

 but is said to be lA ft. high). 



Spine-shields bearing 4 subequal spines, 



2 directed upwards, 2 downwards . . 140. E. isacantha. 



