3S8 PAEKS AND PLEASTJKE-GKOUNDS. 



49. J. dimorpha. , 53. J. raceraosa. 



50. J. aquatica. 54 J. prostrata. 



51. J. glauca. 55. J. religiosa. 



52. J. Cedro. 



The size and forms of the species of this group are very varied ; 27, 

 28, and 31 are pyramidal ; 20 and 26 are oblongated, as is also 32 when 

 young; 17 and 37 are fine shrubs with erect branches and pendulous 

 branchlets ; 2G and 44 are erect, with loose spreading branches ; 42 is 

 pyramidal, with slender weeping branches; 16, 23. 24 are prostrate 

 shrubs. The foliage of 21, 36, 39 is of a light silvery green ; 28, 34, of 

 a glaucous green ; 22 and 32, of a somber green, and the latter with a 

 glaucous tint ; 18, 25, 27, 32, 41, are of a dark green color. J. ■procera 

 (30) is a large useful timber tree in Abyssinia. 



SuBORDEii II. ACTINOSTROBEJE. 



Gen. 1. CALLITRIS. 

 1. C. Quadrivalvis, h? tree. 



Gen. 2. LIBOGEDRUS. 



1. L. Doniana, li? 30-70 ft. 3. L. Chilensis. 



2. L. tetragona. 



Callitris is a large tree from Mount Atlas, with horizontal branches, 

 and shining green leaves. Libocedrus 2 and 3 are from the Andes of 

 Southern Chili and Patagonia, where, it is said, they rival Araucaria 

 imhricata, and are both very fine trees ; 3 has a pyramidal head resem- 

 bling the upiight cypress, with drooping branchlets and vivid green 

 foliage. 



SUBORDEE III. JHUIOPSIDEJE. 



Gen. 1. BIOTA. 



1. B. orientalis, 10-15 ft. 6. B. orientalis pyramidalis. 



2. B. expansa. 7. B. Tartarica, tree. 



3. B. glauca. 8. B. stricta, tree. 



4. B. Xcpalensis. 9. B. pendula, hish. 



5. B. Sieboldii. 



Tlie species of Biota, or Chinese Arbor-vita, form handsome erect 

 shrubs, of a compact liabit and of rather slow growth. B. pendula (9) 

 is an elegant bush or small tree, with slender branches and thread-like 

 drooping branchlets. The foliage of 1 is bright green when young, ac- 

 quiring at length a dark somber color ; 3 has a light glaucous hue, and 

 9 a light green. 



