356 THE BOOK OF EVERGREENS. 



19, C. Uhdcana, Gordon. Another rare and tender 

 species from the mountains of Mexico, where it forms a 

 dense, compact tree about 50 feet in height. It is very 

 beautiful, but only suited for pot-culture with us, although 

 a native of high and exposed situations. 



20, C. Whitleyana, Hort. Syn. C. Roylei, Carriere ; 

 C. australis, Low. This species is also quite tender, and 

 unknown to us in this country. It is a native of the East 

 Indies, where it grows to the height of 100 feet, with nu- 

 merous, erect branches, and large cones and seeds. 



23. RETINISPORA, Siebold. 



Flowers, mono3cious, small, terminal, and on the same 

 branch. Sterile aments, cylindrical. Fertile aments, soli- 

 tary, with two ovules at the base of each woody, wedge- 

 shaped, carpellary scale. Strobiles, small, ligneous, globose, 

 with numerous ovate scales. Seeds very resinous, with 

 resinous vesicles on the testa, and a membranaceous wing. 

 Cotyledons, 2. Leaves, small, linear, bifoliate or trifoliate, 

 spreading, and persistent. Very closely allied to Cupres- 

 sus, and possibly not sufficiently distinct for a separate 

 classification. 



A beautiful genus recently introduced from Japan. The 

 size of the different species varies from mere shrubs of 3 or 

 4 feet, to tall trees 100 feet in height. They are all very 

 handsome and desirable, and are held in much esteem by 

 the Japanese for ornamenting the grounds around their 

 residences and temples. 



The name derives its origin from the resinous coating 



o ^j 



of the seeds, "retine" resin, and "spore" seed. 



R. ohtusa. Siebold. Syn. Chamrccyparis obtusa, End- 

 licher ; Thuja Japonica, Ilort. Leaves, scale-formed, ar- 

 ranged in whorls of four, decussate, obtuse, closely ap- 

 pressed, and very persistent (for several years), bright 



