16,6 Merrill: Philippine Euphorbiaceae, III 579 
Luzon, Ilocos Norte Province, betiveen 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, 32746 
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 described by Boissier, the latter having entire leaves. 
