RUBIACEAE 365 
was correct in reducing his Canthium monoflorum (1837) to 
Canthium pedunculare Cav. (1799). The types of both Canthium 
pedunculare Cav. and CG. lycioides A. Rich. were of Philip- 
pine origin. 
Illustrative specimens from Manila, Luzon, September, 1914 
(Merrill: Species Blancoanae No. 32); Taytay, Palawan, May, 
1913 (Merrill: Species Blancoanae No. 380). 
Canthium pauciflorum Blanco Fl. Filip. (1837) 165 (sp. nov.) =Canthium 
horridum Blume; Blanco op. cit. ed. 2 (1845) 116, ed. 3, 1 (1877) 208, 
t. 57=PLECTRONIA HORRIDA (Blume) Benth. & Hook. f. 
Blanco was apparently correct in reducing his Canthium pauci- 
florum to Canthium horridum Blume. The species is of rather 
local occurrence in the Philippines at low altitudes in the settled 
areas. Canthium hebecladum DC. (1830), based on Philippine 
material, is identical with C. pauciflorum Blanco=—Plectronia 
horrida (Blume) Benth. & Hook. f., Blume’s specific name dating 
from the year 1826. : 
Illustrative specimen from Pasig, Rizal Province, Luzon, No- 
vember, 1914 (Merrill: Species Blancoanae No. 143). 
Ronabea bipinnata Blanco Fl. Filip. (1837) 162 (sp. nov.) =Ronabea 
arborea Blanco op. cit. ed. 2 (1845) 114 (nom. nov.) ; ed. 3, 1 (1877) 
204—PLECTRONIA MONSTROSA A. Rich. (1830) (Canthium mite 
Bartl., 1830; Canthium arboreum Vid., 1885; Canthium’ bipinnatum 
Merr., 1905; Plectronia mitis Elm., 1906). 
This species is common and widely distributed in Luzon. For 
a discussion of the synonymy see Merrill in Philip. Journ. Sci. 
8 (1913) Bot. 48. 
Illustrative specimen from Antipolo, Rizal Province, Luzon, 
January, 1914 (Merrill: Species Blancoanae No. 248). 
Ixora glandulosa Blanco Fl. Filip. (1837) 61 (sp. nov.); ed. 2 (1845) 42; 
ed. 3, 1 (1877) 73=PLECTRONIA GLANDULOSA (Blanco) comb. nov. 
[Plectronia viridis Merr. in Philip. Journ. Sci. 1 (1906) Suppl. 131]. 
Polyozus bipinnatus Blanco Fl. Filip. ed. 2 (1845) 43 (sp. nov.); ed. 3, 1 
(1877) 79=PLECTRONIA GLANDULOSA (Blanco) Merr. 
Ixora glandulosa was erroneously reduced by Fernandez-Villar 
to Canthium confertum Korth., a species unknown from the 
Philippines. It is certainly identical with the form described 
by me in 1906 as Plectronia viridis, but Blanco’s specific name 
being the older is here accepted. The species is of wide distribu- 
tion in the forests of the Philippines at medium altitudes. 
Fernandez-Villar reduced Polyozus bipinnatus to Arthrophyllum 
pinnatum Maingay of the Araliaceae, a species that does not 
extend to the Philippines, and one to which Blanco’s description 
does not at all conform. With the exception of the description of 
