90 PHILIPPINE FIBER PLANTS 



to 20 centimeters long, heart-shaped, and have toothed margins. 

 The flowers and fruits occur in dense clusters. 



This species is very abundant in second-growth forests 

 throughout the Philippines. 



Genus PTEROCYM Bl UM 



PTEROCYMBIUM TINCTORIUM (Blanco) Merr. (Plate XXVII). Taluto. 

 Local names: Abigon, taoto, tautu (Bataan, Leyte) ; bangdt (Zambales) ; 

 bayad^ takung (Surigao) ; balulau (Agusan) ; duidui (Tayabas) ; huligdno 

 (Nueva Ecija) ; libtuk (Cagayan) ; malasapsdp (Pampanga) ; marakdpas 

 (Calayan Island, Ilocos Sur, Benguet) ; mayiio (Manobo) ; taloto or taluto 

 (Nueva Ecija, Bataan, Laguna, Tayabas, Camarines, Mindoro, Negros, 

 Palawan, Cotabato) ; tagungtungan (Cebu) ; takung (Surigao). 



The bast of this tree is pale orange-yellow. King found that 

 rope made from it had a tensile strength of 381 kilos per square 

 centimeter. Immersion in water for twenty-four hours increased 

 the strength about 7 per cent. 



Fterocymhium tmctorium is a tall tree reaching a height of 

 from 45 to 50 meters and a diameter of 90 centimeters. It has 

 a straight, regular trunk from 25 to 30 meters in length. It 

 occurs in the virgin forests and usually on the dryer soils. For 

 a short period during the dry season it is leafless. Typical 

 leaves are heart-shaped. The fruits are oval, over a centimeter 

 long, and with prominent wings 7 to 10 centimeters in length. 

 The wood is white, light, and very soft. 



Genus PTEROSPERMUM 



PTEROSPERMUM Dl VERSI FOLI U M Bl. BayOK. 



Local names: Bdloi, bdroi (Ilocos Sur, Pangasinan, Benguet, Itneg) ; 

 bayog, bayok or bayuk (Nueva Ecija, Pampanga, Zambales, Bataan, Rizal, 

 Cavite, Laguna, Batangas, Tayabas, Camarines, Catanduanes Island, Min- 

 doro, Masbate, Ticao, Negros, Cotabato, Zamboanga, Palawan) ; bayog- 

 bayog (Zamboanga) ; bayong, biyug (Tayabas) ; dibudl (Basilan) ; kabisldk 

 (Davao) ; talingd'an (Ilocos Norte). 



The bast of this species has very little tensile strength and is 

 not commonly used for rope making. The color of the bast is 

 pinkish cinnamon. King found rope made from it to have a 

 tensile strength of 263 kilos per square centimeter, which wetting 

 did not affect. The bark is also used for dyeing purposes. 



Pterospermum diver sifoliiim is a tree reaching a diameter of 

 50 centimeters. The leaves are alternate, hairy, oblong, heart- 

 shaped at the base, abruptly pointed at the tip, and 11 to 25 

 centimeters in length. The flowers are white, 12 to 14 centi- 

 meters long, and occur either singly or in pairs in the axils of 

 the leaves. The fruit is a woody, five-angled capsule about 15 

 centimeters long. 



