76 Proceedings of Ike Roijal Irish Academy. 



each of 5 to 7 stomatic lines. A transverse section of the leaf shows the 

 margins pointed and turned down : proportion of width to thickness as 

 •i"6 : 1 ; epidermal cells all papillate ; hypoderni nearly continuous, with 

 tliick cell -walls; idioblasts very few ; resin-canals with two layers of lining 

 cells. 



Coues, the largest of the genus, 3| to 7 inches lung, and 2^ inches wide; 

 with niuuerous (50-75) scales, in |^ phyllotiv.xis, and with straight, non- 

 retle.xed bracts. Scales thick, woody, broader than long, \\ to 2 inches wide, 

 slightly concave internally, and densely and minutely pubescent externally, 

 rounded above with a creuulale margin. Bracts slightly exserted, straight, 

 with stout terminal awu, and two sharp-pointed lateral lobes. Seed very 

 lai-ge, nearly \ inch long, dark brown and shining above, whitish mottled 

 with brown beneath ; wing broad and rounded. Eafn gives the weights of 

 two lots of 1000 seeds as 72 and lOS grammes. 



Tlie seedlings, which are described by Zederbauer in CentralblaU Gesavimte 

 Forstu-estn, 1908, Part 5, difl'er considerably from those of the Oregon species 

 in the more numerous (7 to 15) and longer (nearly two inches) cotyledons. 

 The primary needles arc also very long, ^ to l-^ inch. The seedlings are 

 delicale, being killed by ordinary winter frosts, and did not survive in the 

 open air at Mariabrunn, near Vienna. 



This species occupies an isolated area in the arid mountains of South 

 (Jaiifornia, at, .".000 to 5000 feet elevation, forming open groves, or growing 

 ID mixture with shrubs, oaks, or pines. Its distribution extends from the 

 .Santa Inez Mouiiuins near Santa Barbara on the coast, to the Cuyamaca 

 Mountains «n the southern borders of California, and it also grows on Sau 

 I'edro Marlir Mountain in Lower California. Tiiis region is characterized by 

 a small rainfall 10 to 25 inches annually), a mild winter, rarely below 15° F., 

 and a very hot suuimer. Other characteristic conifers here are Pinu» Jeffreyi 

 and Pinm Cmdteri, both witii very large cones. 



This species was introduced into England by Mr. H. Clinton Baker, who 

 raised seedlings at Bayfordbury, Hertford, in 1910. Si.x planted out in the 

 woods were thriving in 1919, the lai-gest being 4 feet high. This species is 

 tender to spring frosts, but sheltered by surrounding trees it bore without 

 injury F. in the winter of 1918-1919. 



P»eudot«uga sinensis. Dode, in BiUl. Soc. Doidr. France, 1912, p. 58 ; Craib 

 in Svii.-i R. Bot. Garden, Ediitburgh, xi., plate 161 (1920). 



This species is said to be a very lai-ge tree. Brauchlets moderately 

 pubescent, with minute stiff hairs, reddish brown in the first winter, grey in 

 the secoad aud third years ; pulviui scarcely elevated. Buds not resinous. 



