Vermischte neue Diagnosen. 



271 



or vacuoles (see fig. 1). — Leaves persistent, trifoliate, lateral leaflets 

 small, sessile, usually less than one-third as long as the median, more 

 or less blunt a the base or even rounded. Terminal leaflet gradually 

 narrowed at the base. Petioles narrowly winged with a joint at the 

 point of attachment of the leaflets. Spines slender, straight, sharp,, in 

 pairs at the axils or else one of the spines is replaced by a branch. 

 Inflorescences axillary, composed of from one to several flowers on 

 rather long, slender pedicels. Flowers perfect, 5-merous; calyx 5-lobed, 

 petals 5, stamens 10, free. Pistil with a well developed style and a 

 thick rounded stigma. Ovary with 8 to 10 cells, each containing nu- 

 merous ovules. Fruit, oblong, longitudinally ribbed, with a very thick 

 leathery rind, and with cells (filled with gum?) surrounded with watery 

 tissue containing large cavities or vacuoles. Seeds numerous in the 

 long narrow cells, flattened ovate, hairy. Germination— Cotyledons aerial, 

 not increasing in size; first foliage leaves opposite, broadly ovate, sub- 

 seriate, sessile, abruptly narrowed at base. — A small tree native to 

 the Island of Luzon, Philippine Archipelago. — Chaetospermum re- 

 sembles Belou in having trifoliate leaves, a many-celled ovary, and hairy 

 seeds, but difi'ers in many essential characters as noted above. — It 

 agrees with Feronia in having aerial cotyledons which do not, however, 

 show any increase in size during germination as in this latter genus. 

 It agrees with Aeglopsis in having fruits with a leathery rather than a 

 woody cortex, altho there are woody elements in the rind of an Aeglopsis 

 fruit which seem to be lacking in Chaetospermum. — Chaetospermum differs 

 widely from all the other hard-shelled citrous fruits and constitutes a 

 striking new genus. It undoubtedly 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. 



1070. Chaetospermum glutinosum (Blanco) Swingle in Journ. Wash. Acad, 

 Sei., Ill (1913), p. 102. — Limonia glutinosa Blanco, 1837, Fl. Pilip. Ed. I, p 358. 



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

 Naves, 1878 (?), in Blanco, Fl. Filip. Ed. Ill, pi. 124. — Aegle glutinosa (Blanco), 

 Merrill, 1904, in Philipp. Gov. Lab. Bur. Bull, no. 6, p. 12. — Limonia 

 Engleriana Perkins, 1905, Frag. Fl. Philipp. Fase. III, p. 163. — Belou 

 glutinosa (Blanco) Skeels, 1909, Bull. 162 Bur. Pl. Ind. Dept. Agr., p. 26. 



— Illustrations: Neaves 1878 (?) in Blanco, M., Flora de Filipinas 

 Ed. 3, vol. 2, pl. 124 (Lvs. fis. and fts.). — Vidal y Soler, S., 1883, 

 Sinopsis de familias y generös de plantas lefiosas de Filipinas, pl. 25, 

 fig. J, 1—5 (Fis. fts. and seed). — Swingle, Walter T., 1912, Le genre 

 Balsamocitrus, etc., l. c, pl. 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 Aràyat in this province), Bataân, Manila, and 

 Morong. I have seen specimens from all of these provinces except 



