242 The Philippine Journal of Science 1916 
MEIOGYNE PHILIPPINENSIS Elm. Leafl. Philip. Bot. 5 (1913) 1714. 
MINDANAO, District of Davao, Elmer 11318, distributed as a Melodorum. 
Both of these species are closely allied to M. paucinervia, but differ in 
their shorter and broader petals. M. lucida is characterized by its sessile 
bracteolate flowers, while in M. philippinensis the flowers are pedicelled. 
The three species manifestly are closely allied. 
PAPUALTHIA Diels 
This genus was proposed by Diels '® for a series of species 
from New Guinea, in general similar to Polyalthia but differing 
strikingly in the petals being wholly united below. The genus, 
as defined by Diels, is quite well represented in the Philippines, 
several species having been described under Polyalthia and one 
under Unona. The occurrence of several species of this very 
natural group in the Philippines, and a somewhat larger number 
in New Guinea, is of considerable interest from the standpoint 
of phytogeography. The following Philippine species are here 
transferred to Papualthia: 
PAPUALTHIA LANCEOLATA (Vid.) comb. nov. 
Polyalthia lanceolata Vid. Phan. Cuming. Philip. (1885) 92, 170. 
LuzON, Province of Laguna, Cuming 450 (cotype), For. Bur. 19955, 
19884 Villamil, For. Bur. 11709 Whitford, Baker 603, For Bur. 21346 
Foxworthy & Catalan: Province of Batangas, For. Bur. 11998 Tamesis. 
PAPUALTHIA LOHERI (Merr.) comb. nov. 
Polyalthia loheri Merr. in Philip. Journ. Sci. 7 (1912) Bot. 268. 
Polyalthia romblonensis Elm. Leafi. Philip. Bot. 5 (1913) 1729. 
This species extends from northern Luzon southward to Romblon if 
my reduction of Polyalthia romblonensis Elm. is correct, and from the 
material available I can see no reason for distinguishing the latter species; 
the specimen I have seen of Elmer 12170, however, presents no flowers or 
fruits, and additional material may show it to be really specifically distinct 
from P. loheri Merr. 
PAPUALTHIA SYMPETALA (C. B. Rob.) comb. nov. 
Unona sympetala C. B. Rob. in Philip. Journ. Sci. 6 (1911) Bot. 203. 
Luzon, Province of Laguna, San Antonio, Bur. Sci. 20515 Ramos: Prov- 
ince of Isabela, Bur. Sci. 7999 Ramos: Province of Tayabas, Bur. Sci. 13196 
Foxworthy & Ramos. ROMBLON, Bur. Sci. 10352 McGregor (type). 
PAPUALTHIA RETICULATA (Elm.) comb. nov. 
Polyalthia reticulata Elm. Leafl. Philip. Bot. 1 (1908) 292. 
Polyalthia loheri Merr. var. cagayanensis Merr. in Philip. Journ. 
Sci. 7 (1912) Bot. 269. 
LEYTE, Elmer 7272 (cotype). Samar, Bur. Sci. 17417 Ramos, March, 
1914. Luzon, Province of Cagayan, Bur. Sci. 13948 Ramos: Province of 
Isabela, Biocbian Bay, Bur. Sci. 10664 McGregor. 
“Engl. Bot. Jahrb. 49 (1912) 138. 
