LIST OF CONIFERS AND TAXADS. 



245 



PSEUDOTSUGA, Carriere, ed. 2, p. 256 (1867) ; Bentham and 

 Hooker, Gen. Plant, iii. 441 ; Eicliler, 81. (Tribe Abietine.e.) 



A genus constructed for the reception of the Douglas Fir. The 

 habit and foliage are those of the Silver Firs, the male flowers like 

 those of Picea ; cones pendent, ripening in the first year ; scales 

 persistent ; bracts markedly three-lobed ; wing of seed narrow, 

 pointed ; cotyledons 5-7, 3-sided, entire as are the primary leaves. 

 It diflers from the Spruces in the foliage. The structure of the wood 

 is quite distinct. 



1. P. Douglasii, Carriere, Tmite des Coniferes, ed. 2, p. 256 ; 

 Sargent, aarden and Forest, Oct. 16, 1889, and May 6, 1891; 

 Macoun, 473 ; Beissner, 411, fig. 413, The tree at Dropmore, Gard. 

 Chron. 1874, p. 325. The Douglas Fir. 



SvxoyrMS: — Ahles taxifolia, Poiret (1804). Plans taxifolia, 

 Lambert, ed. 1, t. 33 (1803). Pinus Douglasii, Lambert, ed. 2 (1828), 

 vol. iii. t. 90 ; Parlatore, 430. Pseudotsuga taxifolia, Britton ; 

 Lemmon, Third Report, tab. 10, 11. Abies Douglasii, Lindley ; Yeitch, 

 119, f. 35 ; Loudon, Encyd. 1031, f. 1932 ; Pinet. Brit. ii. 115, 

 t. 17, 18. Picea Douglasii, Link. Tsuga Douglasii, Carriere. 



Yameties : — Yeitch admits the following :— pendula, Staxdishii, 

 TAXIFOLIA (Loudon, Encycl. 1033, f, 1932). Li addition there are 

 mentioned : elegaxs, Staip.ii (variegated), compacta, macrocarpa 

 (Torrey; Lemmon, Tliird Beport, n. 12), moxstrosa, glauca, and 

 revoluta. 



British Columbia to Colorado, Texas, and Mexico. It varies 

 greatly from seed, and according to locality. 



Retinospora, Siebold and Zuccarini (see Cupressus, section 

 Cham^cyparis, Jlt:n^iperus, Biota, and Thlta). Sometimes written 

 Petinispora. The so-called species are really forms or stages of growth 

 of a few species of one or other of the above-named genera, so that two 

 or three forms may sometimes be seen on one bush. These forms 

 may be perpetuated by cuttings or grafts, which retain their cha- 

 racteristics for an uncertain period. The principal forms are the 

 following : — 



B. andelyensis syn. B. leptoclada, a form of Cupressus Thyoides. 

 1 B. decurvata, Carriere. 



B. demssata = a state of Thuia orientalis, jK?e Beissner. 

 1 B. Devriesiana, hort. 

 B. duhia = a state of Thuya oecidentalis. 

 B. Blivangeri = £i state of Thuya oecidentalis. 

 B. ericoides = a state of Thuya orientalis and sometimes also of 

 Cupressus Thyoides. 



B. Jilicoides = a state of Cupressus obtusa. 



B. Jilifera = a state of Cupressus obtusa. 



B. juniperoides ^ a. form of Thuya orientalis, fide Beissner, 



