ENUMERATION OF PHILIPPINE LEGUMINOSAE, 
103 
Pod suborbieular or shortly and broadly oblong, 2.5 to 3 cm wide, never 
more than' twice as long as wide, subtruneate at both ends ( § Euderris ) . 
Leaflets 10 to 18 cm long, stipellate; pod slightly pubescent. 
7. D. elegans 
Leaflets rarely exceeding 10 or 12 cm in length, usually, shorter, exstipel- 
late; pod glabrous. A littoral species 8. D. trifoliata 
Pod distinctly winged along both sutures. (Unknown in D. inindorensis) ; 
( § Dipteroderris ) . 
Leaflets glabrous; pod broadly oblong, about 2 cm wide 9. D. micans 
Leaflets somewhat ferruginous-pubescent—.. 10. D. mindor,ensis 
Standard with two auriculate callosities at the base of the limb ( § Paraderris ) . 
All parts of the plant glabrous 11. D. lianoides 
Young branches, leaves, and inflorescence densely ferruginous-pubescent. 
12. D. elliptica 
1. Derris diadelpha (Blanco) comb. nov. 
Pterocarpus diadelpbus Blanco FI. Filip. (1837) 563, ed. 2 (1845) 393, ed. 3, 
2: 357. 
Pongamia sinuata Wall. Cat. (1832) no. 5911, nomen. 
Derris sinuata Thwaites Enum. PI. Zeyl. (1859) 93; Benth. in Journ. Linn. 
Soc. Bot. 4 (1860) Suppl. 113; Baker in Hook. f. FI. Brit. Ind. 2 (1878) 246; 
F.-Vill. Nov. App. (1880) 68; Prain ex King in Journ. As. Soc. Beng. 66 2 (1897) 
98; Perk. Frag. FI. Philip. (1904) 84; Merr. in Philip. Journ. Sci. 1 (1906) 
Suppl. 66. 
Derris floribunda Naves in Blanco El. Filip, ed. 3, pi. 336, non Benth. 
Derris thyrsiflora F.-Vill. Nov. App. (1880) 68, non Benth. 
Luzon, Province of Zambales, Merrill 2189, Hallier s. n., For. Bur. 7011/ 
Curran: Province of Bataan, Bur. Sci. 590 Mangubat, Merrill 2561, For. Bur. 
12931 Alvarez, Whitford 1261: Province of Rizal, Bur. Sci. 6758 Robinson, For. 
Bur. 476 Ahern’s collector, Guerrero 30, Merrill 1734, 3841, Decades Philip. Forest 
FI. no. 213: Manila, Alberto s. n. Mindoro, Merrill 948, For. Bur. 12229 Rosen- 
bluth. Negros, For. Bur. 5568 Everett, Whitford 1638. Mindanao, Province of 
Surigao, Ahern 359.' 
Native names: Balitos, baloc-baloc (Negros); tibalao, balanli, bagarilao, asin- 
asinanan (Rizal) ; dugo-rogo, rugo-rugo (Bataan) ; bala-y-lamoc (Zambales) ; 
silasilar, ex Blanco. 
Blanco’s Pterocarpus diadelphus was referred by F.-Villar to Derris thyrsiflora 
Benth., a species that does not occur in the area from which Blanco secured his 
material. His description, although short, applies unmistakably to the species 
commonly known as Derris sinuata Thw., and diadelphus, being the earliest valid 
specific name is here adopted. The species is common in the region from which 
Blanco secured most of his material, and flowers from April to June. 
Ceylon and India to the Malay Peninsula and Archipelago, and Indo-China. 
2. Derris thyrsiflora Benth. in Journ. Linn. Soc. Bot. 4 (1860) Suppl. 249; 
Prain ex King in Journ. As. Soc. Beng. 66 2 (1897) 100. 
Millettia thyrsiflora Benth. PI. Jungh. (1851) 249. 
Basilan, Hallier s.n. 
The specimen is in fruit, and is probably referable here ; flowering specimens 
may lead to a different disposition of it. 
Nicobar Islands, the Malay Peninsula, Sumatra, and Java. 
3. Derris polyan.tha Perk. Frag. FI. Philip. (1904) 83. 
Luzon, Province of Pampanga, Merrill 1457 : Province of Rizal, Merrill 1692. 
For. Bur. 430, 2653 Ahern’s collector, Bur. Sci. 2188 Ramos, Decades Philip. Forest 
FI. no. 180 Ahern’s collector. 
