THE PHILIPPINE 



Journal of Science 



C. Botany 



Vol. XIII NOVEMBER, 1918 No. 6 



MERRILLIA, A NEW RUTACEOUS GENUS OF THE TRIBE 

 CITREAE FROM THE MALAY PENINSULA 



By Walter T. Swingle 

 two plates 



In the tropical regions of the Eastern hemisphere there occurs 

 a small but very well-marked group of citrous plants having 

 large fruits with a woody or leathery pericarp, and five or 

 more locules with numerous seeds embedded in a transparent 

 glutinous jelly. These so-called hard-shelled citrous fruits com- 

 prise at present six genera and nine species, and range from the 

 Philippines west to Liberia in western Africa, and from India 

 and Indo-China to Java and other Malayan Islands. Aegle ' 

 with one species occurs in India and Indo-China, Balsamocitrus " 

 with three species in tropical Africa, Aeglopsis with one species 

 in West Africa, Feronia with one species in India and Indo-China, 

 Feroniella 8 with two species in Indo-China and Java, and Cha- 

 etospermum * with one species in the Philippine Islands. These 

 six genera constitute a natural group inside the tribe Citreae. 

 This group I propose to recognize as a subtribe BaLsamocitrinae, 



' These genera and species I have described in popular form in L. H. 

 Bailey's Standard Cyclopedia of Horticulture. New York (1914-1917). 



- Swingle, Walter T., Le genre Balsamocitrus et un nouveau genre 

 voisin, Aeglopsis, Bull. Soc. Bot. France 58 (mem. 8d) (1911) 225-245, t. 

 1-5. Reprinted in Chevalier, Aug., Novitates florae africanae, fasc. 4: 

 225-245, t. 1-5. 



1 Swingle, Walter T., Feroniella, genre nouveau de la tribu des Citreae, 

 fondee sur le F. oblata, espece nouvelle de l'lndo-Chine, Bull. Soc. Bot. 

 France 59 (1912) 774-783, t. 18. 



1 Swingle, Walter T., Chaetospermum, a new genus of hard-shelled 

 citrous fruits, Journ. Washington Acad. Sci. 3 (1913) 99-102. 



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