50 SPECIES BLANCOANAE 
parts of his description that apply to L. semihastatum from 
Cavanilles, and added the circinnatum characters from actual 
specimens of this species. Lygodium circinnatum Sw. is com- 
mon and widely distributed in the Philippines at low and medium 
altitudes. 
Illustrative specimen from Antipolo, Rizal Province, Luzon, 
November, 1914 (Merrill: Species Blancoanae No. 106). 
MARSILEACEAE 
MARSILEA Linnaeus 
Marsilea minuta Blanco Fl. Filip. (1837) 834; ed. 2 (1845) 577; ed. 3, 3 
(1879) 253, non Linn. =MARSILEA CRENATA Pres] (M. mearnsié 
Christ). 
This species is widely distributed in the Philippines, growing 
in open wet places, rice paddies, and in shallow pools at low 
altitudes throughout the Archipelago; it is, however, of rather 
local occurrence. Fernandez-Villar considered that Blanco cor- 
rectly interpreted the Linnean species, but most authorities now 
consider the Philippine Marsilea crenata Presl to be a valid 
species; M. mearnsii Christ is certainly identical with Presl’s 
species. This is also the most likely identification of Marsilea 
trifolia Blanco Fl. Filip. (1837) 835 (sp. nov.); ed. 2 (1845) 
577; ed. 3, 3 (1879) 254 which F.-Villar erroneously reduced to 
Pilularia globulifera Linn. Blanco’s description is manifestly 
that of a Marsilea, and, moreover, no species of Pilularia is 
known to occur in the Philippines. It is suspected that Blanco 
observed an abnormal form of Marsilea crenata, with three, 
rather than four, leaflets; however, no such form appears in our 
collections, and many thousands of living plants examined by 
me in the vicinity of Manila all present four leaflets. Marsilea 
trifolia Blanco antedates M. crenata Presl; but as Blanco’s spe- 
cies must be considered a doubtful one, it is believed that Presl’s 
name should be retained. 
Illustrative specimen from the Barrio of Pineda, Pasig, Rizal 
Province, Luzon, November, 1914 (Merrill: Species Blancoanae 
No. 194). : 
MARATTIACEAE se 
ANGIOPTERIS Hoffmann 
Myriotheca arborescens Blanco Fl. Filip. (1837) 831 (sp. nov.); ed. 2 
(1845) 575; ed. 3, 3 (1879) 248=ANGIOPTERIS ARBORESCENS 
(Blanco) comb. nov. (Angiopteris angustifolia Presl Suppl. (1845) 21)- 
Blanco’s species was reduced by Fernandez-Villar to Cyathea 
integra J. Sm., due to the erroneous description of the species 
as having a trunk five yards high and thicker than one’s arm. 
