ENUMERATION OF PHILIPPINE LEGUMIN OSAE. 
105 
Scandent, glabrous except the inflorescence. Leaflets 5 to 7 , narrowly 
ovate to oblong-lanceolate, 7 to 13 cm long, 2.5 to 4.5 cm wide, base 
rounded or acute, the apex strongly subcaudate-aeuminate, the acumen 
blunt. Racemes shorter than or nearly equaling the leaves, axillary, 
rather slender, somewhat pubescent, many flowered. Flowers white, 
about 1 cm long. Pod thin, narrowly oblong to oblong-lanceolate, blunt, 
4 to 8 cm long, 1 to 1.5 cm wide, very slightly falcate, the wing 1.5 to 
2 mm wide. 
Luzon, Province of Ilocos Norte, Cuming 1162, Bur. Sci. 1635 Ramos: Province 
of Benguet, Elmer 6111 : Province of Rizal, Merrill 5045: Province of Bataan, 
Topping 535, Williams 114: Province of Tayabas, Merrill 1969. 
Manifestly closely allied to Derris scandens (jRoxb.) Benth., differing especially 
in its less numerous, much larger leaves, and its pods not distinctly narrowed at 
both ends as in that species. 
7. Derris elegans (Grah.) Benth. PI. Jungli. (1852) 252; Journ. Linn. Sac. 
Bot. 4 (1860) Suppl. 109; Baker in Hook. f. FI. Brit. Ind. 2 (1878) 252; King 
ex Prain in Journ. As. Soc. Bot. 66 2 (1897) 103. 
Pongamia elegans Grah. in Wall. Cat. (1832) no. 7540. 
Culion, Merrill 666. Negros, For. Bur. 1249 Everett. Leyte, Elmer 1162. 
Mindanao, District of Zamboanga, Williams 2398: Lake Lanao, For. Bur. 3919 
Hutchinson, Mrs. Clemens 434, 484, and several sheets without number. 
The material here referred to Derris elegans seems to differ from the typical 
form of that species, as described, in being nearly glabrous, and having longer 
racemes. One specimen cited above, Merrill 666, was referred by Doctor Perkins 
to Derris uliginosa. Although D. elegans is manifestly allied to that species, 
it is very different in its leaves and inflorescence, and, as noted by Prain, can 
always be distinguished by its stipellate leaves. 
Tenasserim, the Andaman Islands, Malay Peninsula, and Sumatra. 
8. Derris trifoliata Lour. FI. Cochinch. (1790) 433. 
Robinia uliginosa Roxb. ex Willd. Sp. PI. 3 (1800) 1133. 
Dalbergia heterophylla Willd. 1. c. 901. 
Galedupa uliginosa Roxb. Hort. Beng. (1814) 53, FI. Ind. 3 (1832) 243. 
Pongamia uliginosa DC. Prodr. 2 (1825) 416. 
Pterocarpus frutescens Blanco FI. Filip. (1837) 562, ed. 2 (1845) 392, ed. 3, 
2: 356; Naves 1. c. ed. 3, pi. 159. 
Derris uliginosa Benth. PI. Jungh. (1852) 252, Journ. Linn. Soc. Bot. 4 (1860) 
Suppl. 107; Baker in Hook. f. FI. Brit. Ind. 2 (1876) 241; F.-Vill. Nov. App. 
(1880) 68; Vid. Rev. PI. Yasc. Filip. (1886) 113. 
Babuyanes Islands, Camiguin, Bur. Sci. 4001 Fenix. Luzon, Province of 
Zambales, Hallier s. n.: Manila, Elmer 5503: Province of Bataan, For. Bur. 
6356 Curran: Province of Tayabas, Whitford 581, 591, 159: Province of Cama- 
rines, For. Bur. 12218, 12288 Curran. Polillo, Bur. Sci. 6988 Robinson. 
Mindoro, For Bur. 5516 Merritt, Bur. Sci. 921 Mangubat. Palawan, Bur. Sci. 
831 Foxworthy. Cebu, Bur. Sci. 1115 McGregor. Mindanao, District of Zam- 
boanga, Hallier s. n.: District of Cotabato, Mrs. Clemens 810: District of 
Davao, Williams 2146, Copeland 352. Basilan, For. Bur. 3913 Hutchinson. ‘ 
Native names: Mangasin (Tayabas) ; tuba-tuba (Basilan) ; sila-sila, ex Blanco: 
hingasin, him gasman ( Panay), ex F.-Villar. 
A species confined to salt water or brackish swamps along the seashore 
