16,6 Merrill: Philippine Euphorhiaceae, III 579 



Luzon, Ilocos Norte Province, between Burgos and Bangui, 

 Bur. Sci. 27309 bis (type), 27517 Ramos, March, 1917, on open 

 dry slopes at low altitudes. 



This species is distinguished among its congeners such as 

 Euphorbia humifusa Willd., E. makinoi Hayata, and allied forms 

 by its orbicular leaves and its cymose inflorescences. 



EUPHORBIA MAKINOI Hayata in Journ. Coll. Sci. Tokyo 30' (1911) 262. 

 Euphorbia microphylla Hayata op. cit. 20^ (1904) 79, t, 5, f. H, 

 non Heyne. 



Luzon, Ilocos Norte Province, Burgos, Bur. Sci. 27309, 327^6 

 Ramos, February, 1917, and July, 1918, in open dry places at 

 low altitudes. 



This species has previously been known only from Formosa, 

 the specimens cited above agreeing perfectly with Hayata's de- 

 scription and figure. It is very closely allied to Euphorbia neo- 

 caledonica Boiss., as represented by Cribs 753 and 758 from New 

 Caledonia, the former number having minutely serrulate leaves, 

 as (kscribed by Boissier, the latter having entire leaves. 



