56 
MERRILL. 
28. MEZONEURUM Desf. 
Calyx deeply cleft, with a wide short tube and a basal disk, the anterior lobe 
deeply cucullate (§ Eumezoneurum) . 
Leaflets opposite, large, ovate, acute or acuminate, about 10 cm long. 
1. M. cucullaturn 
Leaflets alternate or subopposite, small, elliptic to elliptic-oblong, broad and 
rounded at the apex, 1.5 to 3.5 cm long. 
Leaflets beneath and calyx externally rather densely pubescent. 
2. M. pubescens 
Leaflets and calyx glabrous. 
Leaflets about 1.5 cm long; pods 1-seeded 3. M. mindorense 
Leaflets 2.5 to 3.5 cm long; pods 5- to 7-seeded 4. M. latisiliquum 
Calyx shallowly cleft, with a narrow, elongated tube, the disk extending above 
the base, the anterior lobe shallowly hooded. (Leaflets alternate, obovate- 
oblong, obtuse, 5 to 7 cm long) (§ Tubicalyx) 5. M. sumatranum 
1. Mezoneurum cucullaturn (Roxb.) Wight & Arn. Prodr. (1834) 283; Baker 
in Hook. f. FI. Brit. Ind. 2 (1878) 258; Prain ex King in Journ. As. Soc. Beng. 
66 2 (1897) 232. 
Caesalpinia cucullata Roxb. Hort. Beng. (1814) 32, FI. Ind. 2 (1832) 358. 
Mezoneurum macrophyllum Bl. ex Miq. FI. Ind. Bat. I 1 (1855) 104. 
Mindanao, Lake Lanao, Camp Keithley, Mrs. Clemens 922, February, 1907. 
India to Yunnan ( Henry 12215), south to Cochin-China, the Andaman Islands 
and Java; not previously reported from the Philippines. 
Mezoneurum macrophyllum Bl., was reduced to M. cucullaturn W. & A. by 
Baker, and the description of Blume’s species seems to apply rather closely to the 
latter. 
2. Mezoneurum pubescens Desf. in Mem. Mus. Paris 4 (1818) 245, t. 11; 
F.-Vill. Nov. App. (1880) 70; Vidal Rev. PI. Vase. Filip. (1886) 114. 
Caesalpinia ignota Blanco FI. Filip. (1837) 336, ed. 2 (1845) 235, ed. 3, 2: 72. 
Mezoneurum hymenocarpum W. & A. Prodr. 1 (1834) 283; Prain in Journ. 
As. Soc. Beng. 66= (1897) 233, 472 ? 
Luzon, Province of Rizal, For. Bur. llfil, 3370 Ahern’s collector, Dec. Philip. 
Forest FI. no. 206 Ahern’s collector; near Manila, Marave 69, McGregor 79, Liana 
229, Merrill. 
Native names: Camat-cabag, dauag (Rizal). 
Timor. 
There is some doubt as to the additional range of this species, as Baker records 
it from Burma, but Prain states that the Burman, Ceylon, and Andaman Island 
material is Mezoneurum hymenocarpum W. & A., which species has alternate 
leaflets, much fewer in number than those of M. pubescens Desf. Fragments of 
three of the above numbers, representing flowers, immature and mature pods, 
were sent to the Paris Museum for comparison with Desfontaines’ type. Doctor 
Lecomte, who kindly made the comparison, writes as follows : “II resulte de 
cette 6tude que l’un des echantillons envoyes correspond aussi bien que possible 
a M. hymenocarpum W. et A., et l’autre a M. pubescens Desf., type. I, M. hyme- 
nocarpum W. & A., coll. Liana 229, 2, M. pubescens Desf., coll. Ramos 1J/77, 
Marave 69. De la premiere espfece nous possedons un (ichantillon envoye par 
King absolument semblable a celui qui vous nous avez communique. De la 
deuxi&me nous avons pu faire la comparaison avec le type.” After a careful exam- 
ination of a full series of specimens, however, I am convinced that but a single 
species is represented by the material cited above. The specimen collected by 
Liana, examined by Doctor Lecomte, has very thin, immature fruit, but in all 
