Enphorhia^ Eai'HOiiBiACE.E (Browu). 23;i 



thick, usually with 1-2 pairs of 

 lateral branchlets below the 



forked or simple ends (44) amarifontana, 



Primary lateral branches 1-1^ lin. 

 thick, repeatedly forking into a 

 lax cyme 3-8 iu. across ... (45) Rudolfii. 



Bracts or leaves with a distinct petiole- 

 like part, sj^athulate, rounded to 

 subtruncate at the entire apioulate 

 or denticulate apes, about as long 

 as or shorter than the involucre : 

 Plant 6-8 in. high ; branches diverging, 

 with internodes 3-12 lin. long ; 

 ovary exserted 1-2 lin. beyond 

 the involucre (51) ^quoris. 



Plant 9-12 in. or more high ; inter- 

 nodee mostly |-2f in. long : 

 Branches and branchlets erect, sub- 

 parallel ; mnle involucres 1-1^ 

 lin. in diam (51) ephedroides. 



Branches and branchlets diverging 



froui each other at an angle of 



50^-70"^ ; male involucre 1^- 

 1^ lin. in diani. : 

 Styles J- J lin. long, free to the 



base (54) spartaria. 



Styles J lin. long, united into a 



short column at the base ... (5G) rectirama 



(browsed specimens). 



ttCymes or (in a few species) solitary involucres 



arranged racemoseiy in pairs along the 

 branchlets and also often a terminal one, 

 or sometimes in a subspicate manner near 

 or at their tips; 

 ■ Plant 3-6 in. high ; branches thick^ very 



fleshy, brittle when dried ; cymes or 



involucres few, subsessile at the tips 



of very short terminal branchlets (and 



sec65, j&'. stapelioidcs) , . . (64) gentilis. 



Plant usually more than 1 ft, high, not 

 very brittle when dried; cymes in 

 several or numerous pairs scattered 

 along the usually elongated branches : 

 Bracts under the involucres sessile, with- 

 out a putloledike part, bruwn to 

 blackish-brown : 

 Cymes subsessile or on peduncles less 

 than J in. long ; branches 1-2^ 

 Hn. thick: 

 Branches diverging from each other 

 at an angle of i}0^-150° ; bracts 

 not thick and Heshy, deltoid- 

 ovatCj acute, concave ... ... (39) decussata. 



Branches diverging from each other 

 at an angle of 60^-90° ; bracts 

 . thick and fleshy, suborbicular or 

 oblong, obtuse, apiculate ... (61) Mundii. 



