NEW PHILIPPINE FLORA. 425 



MiNDORO, Baeo River (F. B. 5518 Merritt) November, 1900. in manorove 

 swamps. 



Var. longipetiolata Merrill n. var. 



Petiolo 1.5 ad 4.5 cm. longo, ceteroquin ut 0. javanica Bl. 



MiNDORO, Subaan (6226 Merrill) December, 1906; Baco River ( F. B. 5488 

 Merritt) November, 1906, in mangrove swamps. 



The genus is new to the Philippines, the five known species being Malayan, 

 the genus therefore a characteristic Malayan one. 0. javanica is found along 

 the seashore from Tenasserim througli the Malayan Peninsula to Borneo, Java, 

 Banka and Billeton. 



VEEBENAOE^. 



PETRAEOVITEX Oliver. 



Petraeovitex trifoliata Merrill n. sp. 



Frutex scaudens; foliis oppositis, trifoliatis, giabris vel parce pube- 

 riilis; petiolo 3 ad 4 cm. longo; foliolis ovatis vel oblongo-ovatis, acu- 

 minatis, usque ad 7 cm. longis; paniculis terminal ibiis, 20 ad 40 cm. 

 longis, pubenilis; flores 8 mm. longi; calycis fructiferis lobis 1.5 ad 2 cm. 

 longis. 



A scandent shrub. Branches brown or gray, quadrangular, puberulent, 

 becoming glabrous, 1.5 to 2 mm. in diameter. Leaves opposite, trifo- 

 liate, the petiole 3 to 4 cm. long, puberulent, the petiolules 4 to 10 mm, 

 long; leaflets ovate to oblong-ovate, 7 cm. long, 2.5 to 5 cm. wide, 

 subcoriaceous, glabrous or nearly so, somewhat shining, paler beneath, 

 the apex acuminate, the base rounded, often somewhat inequilateral; 

 nerves rather prominent beneath, about 4 on each side of the midrib, 

 the reticulations lax. Panicles terminal, the lower branches subtended 

 by leaves, 20 to 40 cm. long, puberulent, the axis and branches quad- 

 rangular. Flowers purple, about 8 mm. long. Calyx puberulent, the 

 tube 4 mm. long, the lobes in anthesis 4 mm. long, oblong-lanceolate. 

 Corolla equalling the calyx, the tube 5 mm. long, narrowly funnel- 

 shaped, pul)erulent outside, slightly so at the throat inside, the lobes 

 3 mm. long, oblong-ovate, rounded. Stamens 4 ; filaments about 4 mm. 

 long, slightly puberulent; anthers 1 mm. long. Calyx in fruit accres- 

 cent, the lobes 1.5 to 2 cm. long, oblanceolate, spatulate, ol)tuse. 



Palawan, Victoria Peak (B. S. 708 Foxworthy) March, 1906, on open steep 

 slopes at 900 m. alt. Nearly or quite the same species is represented by a 

 specimen collected by Hallier in February, 1904, at San Ramon, near Zam- 

 boanga, Mindanao. 



The genus new to the Philippines, ])ut two species previously known, one from 

 Biu-u Island and one from New Ciuinea. The present species is apparently most 

 closely related to the Burn species, Petraeovitex riedelii Oliv. in Hook. Icon. 

 PI. III. 5 (1883) 15. PI. 11,20, the type of the genus, distinguished at once 

 from that species by its trifoliate leaves. 



