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JOURNAL OF THS ROYAL HORTICULTURAL SOCIETY. 



fairly rapid, the average of fifteen specimens growing under favourable 

 circumstances being 20 inches. At Hafodunas, in North Wales, one 

 of these trees in thirty-five years produced 48^ feet of wood, or fully 

 1^ foot per annum. Introduced in 1851 (Trans. Roy. Scot. Arb. Soc. 

 xii. pt. 2). 



This species is still rare in Danish gardens. One of about the 

 age of forty years has attained a height of 30 feet. 



T. Pattoniana, Engelm. in Bot. Calif, and Wats. Fl. Calif, ii, 

 121. Ahies Pattoni Pattoniana, Jefir. in Rep. Bot. Exp. to Oregon, 

 1 {cum ic). A. Hooheriana, Murr. in Edinb. New Phil. Journ. 1855, 

 new ser. 289, t. 9. A. Williamsoni, Newb. Pacific P.R. Pep. ii. 

 53, t. 7. (?) Picea californica, Carr. Tr. Conif. 261, and ed. 2, 346. 

 Pimis Pattoniana^ Pari, in DC. Prodr. xvi. 2, 429. Tsuga Hooker- 

 iana, Carr. Conif. ed. 2, 252. 



An alpine tree, rarely 100 feet in height, with a trunk 5-7 feet 

 in diameter ; dry slopes and ridges near the limits of tree growth, 

 ranging from an elevation of 2,700 feet in British Columbia to 10,000 

 feet in the Sierras of Central California. 



Habitat. — Valley of the Fraser River, British Columbia, and 

 probably much further north ; south along the Cascade Mountains and 

 the Californian Sierras to the head-waters of the San Joaquin River, 

 extending east along the high mountains of Northern Washington 

 Territory to the western slopes and summits of the Coeur d'Alene and 

 Bitter Root Mountains of Idaho (Lolo trail, Watson), and the divide 

 between Tompson and Little Bitter Root Creeks, Northern Montana 

 (H. B. Ayres). 



T. P. argentea. Both the species and the variety seem to 

 thrive very well. 



T. Sieboldii, Carr. Conif. ed. 1, 18G, Ahies Tsuga-, Sieb. and 

 Zucc. Fl. Jap. ii. 14, t. 106. Pinus Tsuga, Ant. Conif. 23, t. 32, f. 2 ; 

 Endl. Conif. 83. P. Araragi, Sieb. Verh. van het Batav. Genotsch. 

 xii. 12. Ahies Ararsegi, Loud. Encycl. of Trees, 1036. Tsuga Tsuja, 

 Murr. Sketch of Conif. of Jap. in Proc. Hort. Soc. ii. 508. 



Hahitat. — In Kiushiu and Shikoku this Tsuga almost wholly 

 occupies many narrow, stony, but warm valleys. At a higher eleva- 

 tion it grows together with Pinus ixirvi flora. 



36. PSEUDOTSUGA.— Carr. Conif. ed. 2, 245, and in Rev. 

 Hort. 1868, 152 {cum ic.) ; Pari, in DC. Prodr. xvi. 2, 430 (Pini sect. 

 Tsuga) ; Spach, Hist. Veg. Phan. xi. 423 (Peucoides) ; Endl. Syn. 

 Conif. 87 ; Engelm. Bot. Calif, ii. 119 ; Forb. Pin. Wob. t. 45 ; 

 Nutt. N. Amer. Sjlv. t. 115 (Abies) ; Hook. Fl. Bor. Amer. t. 183 

 (Pinus) ; Newberry, Bot. Williams Exped. t, 8 ; C. Koch, Dendr, ii. 

 255 (Abies) ; Henk. and Hochst. Nadelh. 155 (Abies) ; Eichler in Engl, 

 and Prantl, Natlirl. Pflf. ii. s. 80 (Tsuga inch Pseudotsuga) ; Willk. 

 Forstl. Fl. s. 103 ; Beissn. Handb. der Nadelholzk. 410. 



