DICHOTOMOUS KEY 13 



**. Flowers 4 or more in axillary fascicle; lobe of the 

 gamosepalous calyx short, dentate; tree or shrub. 

 +. Leaves ovate or elliptical, papery, 9 to 12 veins of the 



first rank ; — see -\ 1- C. arabica L. 



-f- +. Leaves narrow-elliptical, thickly coriaceous, 5 to 7 



veins of the first rank C. congensis Froehner 



b. Leaves with shorter, obtuse terminations. 

 X. Leaves not diflFering macroscopically on the two surfaces; 

 — see y. 

 *. Leaves remarkably glossy; both surfaces bear sharply 

 prominent, graceful, reticulated venation; calyculus not 

 extending the calyx-margin. 



-[-. Flowers i to 4 in a cluster; leaves ovate 



C. mauritiana Lam. 



y. Leaves differing macroscopically on the two surfaces. 



*. Leaves dull above, very glossy below, with 10 to 12 



veins of the first rank, lower surface shows prominently 



reticulated venation, broadly ovate; sclerenchymatous 



tissue rather abundant; fruit oval, longitudinally 



striped ; a glabrous, erect shrub ; — see ** 



C. Zawguehariae Lour. 

 **. Leaves olive or brownish above when dry, paler be- 

 neath, small, oblong or oblong-lanceolate, obtuse . . . 



C. Swynnertonii S. Moore 

 B. Leaves 18 to 30 cm. long, thinly coriaceous or chartaceous. 



a. Flowers 4 or more in a fascicle; leaves ovate or obovate, 

 sometimes cuneate toward the base, apex short; upper sur- 

 face dark, glossy, lower surface lighter and bearing dis- 

 tinct first-rank veins; calyculus not projecting beyond the 

 calyx-margin ; — see b. 



X. Flowers 5- (rarely 4-) partite; leaves with 12 to 14 paired 



lateral veins of the first rank; — see y 



C. camphor a Pierre 



y. Flowers 6-8-merous; leaves with 8 to 12 paired lateral 

 veins of the first rank C. Uberica Bull 



b. Flowers in dense axillary fascicles, about 4.4 cm. in diam- 

 eter, often with a few small leaves intermixed; leaves 

 large, chartaceous, oblong-elliptical, obtusely caudate- 



