SIMARUBACEAE 205 
Citrus decumana was correctly interpreted by Blanco. It is 
common and widely distributed in the Philippines in cultivation, 
but is not a native of the Archipelago; undoubtedly of prehis- 
toric introduction, probably from southern China. Its more 
general native aames are suha and lucban. Aurantium mazxi- 
mum Burm. f. supplies the oldest specific name. 
Illustrative specimen from Batangas Province, Luzon, August, 
1914 (Merrill: Species Blancoanae No. 78). 
SIMARUBACEAE 
AILANTHUS Desfontaines 
Ailanthus pongelion Blanco Fl. Filip. (1837) 380; ed. 2 (1845) 268; ed. 
8, 2 (1878) 134, non Gmel.=AILANTHUS BLANCO! Merr., infra. 
Fernandez-Villar reduced Ailanthus pongelion Blanco to Ailan- 
thus malabarica DC., which I considered to be correct in my 
first paper on Blanco’s species, Govt. Lab. Publ. (Philip.) 27 
(1905) 29. Later, however, having secured flowering material 
from Bataan Province, together with fruiting material from 
Tayabas and Camarines, I proposed the species Ailanthus philip- 
pinensis Merr., of which For. Bur. 2719 Borden is the type. To 
this species I reduced Ailanthus pongelion Blanco, non Gmel., 
but I am now convinced that this was an error. Blanco’s de- 
scription is very imperfect, but his statement “Samaras muy lar- 
gas” applies to the form I propose to call Ailanthus blancoi, 
which has fruits up to 12 em in length, rather than to A. philip- 
pinensis Merr., which has fruits only 5 cm long. Below is given 
a description of the new species: 
AILANTHUS BLANCO! Merrill sp. nov. § Eupongelion. 
Arbor alta, usque ad 40 m alta, ramulis incrassatis; foliis 
glabris, circiter 80 cm longis, foliolis 9-jugatis, valde inaequilate- 
ralibus, usque ad 18 cm longis, acuminatis, integris, in siccitate 
pallidis; paniculis axillaribus, circiter 50 cm longis, subglabris 
vel leviter pubescentibus; floribus 5-meris, petalis extus pubes- 
centibus, filamentis glabris; fructibus planis, valde reticulatis, 
apice rotundatis, circiter 12 cm longis, 3.5 ad 4 cm latis. 
A tall tree, reaching a height of at least 40 meters, glabrous 
except the tips of the branchlets and parts of the inflorescence. 
Ultimate branchlets light-gray, stout, up to 2 cm in diameter, 
marked with large petiolar scars, the very tips pubescent. 
Leaves about 80 cm long, entirely glabrous, the leaflets about 
9-jugate, obliquely oblong-ovate, somewhat falcate, entire, acumi- 
nate, base very inequilateral, pale when dry, 12 to 18 cm long, 
5 to 6.5 em wide, usually with a few glands on the lower surface 
