226 THE CULTIVATED EVERGREENS 



scarcely glandular: cones cylindrlc-ovoid, little over Yi inch long; scales 

 8-10, elliptic-oblong, usually the 3 middle pairs fertile; seeds winged, notched 

 at the apex. Alaska to northern California and Montana. — Introduced in 

 1853 to England by Lobb. The Rocky Mountain form is hardy as far north 

 as Massachusetts. Handsome pyramidal tree of rapid growth with bright 

 green lustrous foliage which retains its color in winter. 



Var. atrovirens, Sudw. (7". gigantea atrovirens, Beiss. T. Lobbii var. 

 atrovirens, Hort. T. occidentalis Vervceneana atrovirens, Hort.). Foliage dark 

 green. 



Var. fastigiata, Schneid. (T. gigantea fastigiata, Beiss. T. gigantea -pyrami- 

 dalis. Bean). Columnar form. 



Var. pendula, Sclmeid. {T. gigantea pendula, Beiss.). Form with slender 

 pendulous branches. 



3. T. Standlshii, Carr. {T.japonica, Maxim. Thujopsis Standiskii, Gord.). 

 Standish a. Tree to 50 feet, with spreading or somewhat ascending branches 

 forming a broad pyramid; bark reddish-brown, thin, separating into small 

 scales leaving pale gray blotches; branchlets rather thick, compressed: leaves 

 bright green above with triangular white marks below, glandless, those of 

 the main axes with rigid free points, those of the lateral branchlets obtuse, 

 ovate: cones ovoid, H-H inch long; scales 10-12, broad-ovate, the two middle 

 pairs fertile; seeds 3 to each scale with narrow wings not notched at apex. 

 Japan." — Introduced to Great Britain in 1861. Hardy as far north as Mas- 

 sachusetts. Handsome ornamental tree with rather broad head, quite dif- 

 ferent in habit from the preceding species. 



4. T. koraiensis, Nakai. Korean A. Low spreading shrub, usually with 

 decumbent branches, rarely a slender narrow-pyramidal tree to 12 feet tall, 

 with spreading branches ascending at the ends; bark thin, scaly, chocolate- 

 brown; branchlets much flattened: leaves of main branches triangular-ovate, 

 acuminate, glandular, of lateral branchlets deltoid or rhombic, acutish or 

 obtuse, glandular, bright green above, glaucous beneath: cones elliptic- 

 ovoid, about 3^ inch long, light brown; scales 8, those of the 2 middle fertile 

 pairs oval to narrow-obovate; seeds with the wing emarginate at apex. 

 Korea. — Introduced to the Arnold Arboretum in 1918 by E. H. Wilson. 

 Probably hardy as far north as Massachusetts. 



5. T. orientalis, L. (Biota orientalis, Endl.). Oriental A. Pyramidal or 

 bushy tree branching from near the base, attaining 60 feet, with spreading 

 and ascending branches; bark thin, separating into papery scales, reddish- 

 brown; branchlets thin: leaves of main axes with a free rather spreading apex, 

 those of the lateral branchlets closely appressed, rhombic-ovate, acute, 

 bright green, with a small gland on the back : cones globose-ovate, 3^-1 inch 

 long, fleshy and bluish before ripening; usually 6 ovate scales, each with a 

 Lom-like process, the uppermost pair sterile; seeds 2 to each scale, ovoid. 



