Motiadenmm.] 



CXXII. EUPHORBIACE.E (bROWX). 



451 



9. 



Tubercles flattish, scarcely prominent 

 Tubercles very distinctly prominent. 

 Leaves about as long as broad 

 Leaves much longer than broad. 



Leaves up to 1^ in. long, spathulate . 



Leaves J-| in. long, linear-lanceolate . 



Tubercles ^-1 lin. long, without prickles 



under or around the leaf or leaf -scar; 



leaves A-i in. long ..... 



**Stems annual from a ])erennial rootstock or tuber. 



Plant witli soft prickle-like processes on the 



peduncles and cymes. 



J*eduncles -h-1 in. long ; bract-cup 3-4 lin. 



long, conspicuously reticulate . 

 Peduncles l^-Si in. long. 



Stem pubescent with short deflexed hairs; 



involucre inrolled at the top margin 

 Stem glabrons ; involucre slightly recurved 

 at the top margin .... 



Plant glabrous or ])ubcscent, without prickle-like 

 jirocesses on any part of it. 

 Cyme-peduncles 1-3 in. long. 



Leaves linear-lanceolate, ^-| in. broad, 



acutely toothed ; capsule with 2 very 



narrow wings along eacli angle 



Leaves subspathulate to suborbicular, f-2 



in. broad, crisped or entire. 



Leaves 2-6 in. long; capsule without 



wings or crests along the angles 

 Leaves l}-2^ in. long; capsule with 2 

 broad tootiied wings along each angle 12. 

 I'yine-peduncles P^-^ (in M. eriibescens 

 sometimes 1) in. long. 

 Stem and leaves puberulous ; bract-cup 

 ^-^ in. long and as much or more in diam. 

 Stem and leaves (except in M. invenustiim) 

 glabrous. 

 -Cymes 4-5-times forked, with many in- 

 volucres, compact or rather dense; 

 bract-cups 1^-2^ lin, long. 

 l?ract-cups deep red or purple; in- 

 volucre 2-2i lin. long, broadest 

 below the middle 

 Bract-cups green or reddish-tinted; 

 involucre ]|- lin. long, broadest just 

 above the middle .... 

 Cymes at first with 1 involucre, finally 

 once or twice forked with 3-7 in- 

 volucres, often luodding. 

 Involucre with 4 distinct crenations at 

 the top margin ; leaves linear- 

 lanceolate ..... 

 Involucre entire at the top margin. 

 Bracts free to the base on both 

 margins. 



7. M. PcJiinulaivjii 



M. aculeolafun;. 

 M. asperrimnm. 



10. M. Goetzei. 



11. 



M. IcEve. 

 M. major. 



13. M. erulescens. 



14. M. coccinenm. 



15. M. parvifiorum. 



2L M. crenatum. 



