200 The Philippine Journal of Science me 



leaves, up to 10 cm long, prominently ciliate with long, spreading, 

 pale hairs. Flowers white, 6-merous, scattered, not fascicled, 

 along the rachis, their prominently ciliate pedicels about 3 mm 

 long, jointed to the calyx, the flower readily falling, the sub- 

 tending bracts linear-lanceolate, 2.5 to 3 mm long, ciliate. Calyx- 

 tube funnel-shaped, about 2 mm long. Sepals 6, linear, 4 to 5 

 mm long, ciliate. Petals 6, narrowly spatulate, ciliate, as long 

 as the sepals. Stamens 3 opposite each petal, their filaments 

 5 mm long, prominently ciliate in the lower one-half. Ovary 

 ovoid, ciliate; styles 6, about 5 mm long, hirsute-ciliate in the 

 lower one-half with spreading hairs. 



Samar, Catubig River, Bur. Sci. 24188 Ramos, in damp forests at low 

 altitudes, February 13, 1916. 



Most closely allied to Homalium villarianum Vid., from which it is 

 readily distinguished by its sepals not being at all spatulate but linear, 

 as well as by other characters. 



LECYTHIDACEAE 



PETERSIANTHUS nomen novum 



(Petersia Welw., 1867, non Klotzsch, 1861) 



PETERSIANTHUS QUADRIALATUS (Merr.) comb. nov. 



Terminalia quadrialata Merr. in Philip. Journ. Sci. 4 (1909) Bot. 301. 



Masbate, Bur. Sci. 12558 Rosenbluth, type, in fruit, Bur. Sci. 12814, 

 12597 (fruits and seedlings), 12562 (old fruits), 12583 Rosenbluth. Samar, 

 Bur. Sci. 24146 Ramos, February, 1916, For. Bur. 24746 Phasis, November 

 19f 1915, both in flower, For. Bur. 12874, 12617 Rosenbluth, both sterile. 

 Luzon, Province of Sorsogon, For. Bur. 4526 Zschokke, May, 1906, with old 

 fruits. Mindanao, Subprovince of Butuan, For Bur. 18865 Varian, For. 

 Bur. 7556 Hutchinson, Sherfesee s. n., all sterile. 



This species is widely distributed in the central and southern Philippines, 

 and is widely known as toog (Sorsogon, Samar, Masbate, and Butuan). 

 The tree reaches an enormous size, one cut and measured at Amparo, 

 Butuan Subprovince by Mr. Varian, presenting a trunk with a diameter 

 of 186 cm at 2 meters above the ground, and a length of 35 meters to 

 the first branch. 



The species was first described from fruiting specimens and was 

 erroneously placed in Terminalia. Now that flowers are available for 

 study, it is clearly referable to the African genus Petersia Welw., which 

 I have here renamed Petersianthus, as Petersia is a name preoccupied by 

 Klotzsch's genus of the Capparidaceae. A description of the flowers is 

 as follows: 



Inflorescence terminal, peduncled, corymbose-paniculate, including the 

 peduncle, about 10 cm long, sometimes supplied with dwarfed leaves. 

 Flowers white, their pedicels about 3 mm long. Calyx-tube sharply 4- 

 angled or narrowly 4-winged, gradually enlarged upward, about 6 mm 

 long, the lobes 4, alternate with the angles, orbicular, rounded, imbricate, 

 4 to 5 mm in diameter. Petals 4, orbicular-ovate, rounded, about 1 cm 



