102 swingle: chaetospermum 



Chaetospermum differs widely from all the other hard-shelled 

 citrous fruits and constitutes a striking new genus. It undoubt- 

 edly belongs to the hard-shelled group of citrous fruits tho it 

 alone does not (so far as known) have woody elements in the 

 cortex. 



Only one species is known; its synonomy is as follows: 

 Chaetospermum glutinosa (Blanco) n. comb. 



Limonia Glutmosa Blanco, 1837, Fl. Filip. Ed. I, p. 358. 

 Feronia ternata Blanco, 1845, Fl. Filip. Ed. II, p. 252. 

 u^gle decandra, Naves, 1878 (?), in Blanco, Fl. Filip. Ed. 



Ill, pi. 124. 

 Aegle glutinosa (Blanco), Merrill, 1904, in Phillip. Gov. 



Lab. Bur. Bull. n. 6, p. 12. 

 Limonia Engleriana, Perkins, 1905, Frag. Fl. Phillipp. Fasc. 



Ill, p. 163. 

 Belou glutinosa (Blanco) Skeels, 1909, Bull. 162 Bur. PL 

 Ind. Dept. Agr. p. 26. 

 Illustrations : 



Naves 1878 (?) in Blanco, M., Flora de Filipinas, Ed. 3. 



vol. 2, pi. 124 (Lvs. fls. and fts.) 

 Vidal y Soler, S., 1883, Sinopsis de familias y generos de 

 plantas lefiosas de Filipinas, pi. 25, fig. J, 1-5 (Fls. fts. 

 and seed). 

 Swingle, Walter T., 1912, Le genre Balsamocitrus, etc., 1. c, 

 pi. 5 (Young plant). 



The tabog is a small tree native to the central part of Luzon, 

 Philippine Islands. This species has been reported from the 

 provinces of Tarlac, Pampanga (the type locality is Monte 

 Arayat in this province), Bataan, Manila, and M6rong. I have 

 seen specimens from all of these provinces except Pampanga 

 and M6rong, and have also seen a specimen in Herb. Kew col- 

 lected by Vidal y Soler in 1886 at Angat, Prov. Bulacan. 

 Young plants from 'one to three years old are now growing in 

 the greenhouses of the Bureau of Plant Industry. 



It has been found that oranges, lemons, grape-fruits, kumquats 

 and other citrous fruits grow well when budded or grafted on 

 such young tabog plants. 



