292 THE CULTIVATED EVERGREENS 



maturity; seed-wings extending to the upper margin of the scale. Mountains 

 of northern and central Europe. — Hardy as far north as southern Ontario 

 and New England. 



Var. pendula, Kuntze (var. pendulina, Regel. L. europoea var. pendula. 

 Laws.). Weeping European L. A form with pendulous branches. 



5. L. sibirica, Ledeb. {L. europasa var. sibirica, Regel, and var. rossica, 

 Regel). Siberian L. Tree to 120 feet, with straight slender stem and rather 

 short ascending branches; branclilets yellow; winter-buds grayish-brown 

 and dark brown or nearly black at the base: leaves linear, 1-2 inches long: 

 fertile flowers usually green, sometimes whitish or brownish: cones ovate- 

 oblong, usually IH inches long; scales about 30, larger than in the preceding 

 species, finely tomentose on the back, truncate or rounded at the margin, 

 half-spreading at maturity; seed-wings not extending to the upper margin 

 of the scales. Northeastern Russia to Siberia.— Introduced in 1806 to 

 England. Hardy as far north as Saskatchewan. 



6. L. dahnrica, Turcz. {L. Cajanderi, Mayr). Dahxjrian L. Tree to 70 

 feet, of fairly regular habit while young, old trees usually irregular with 

 wide-spreading branches; branchlets bloomy; winter-buds yellowish-brown, 

 darker or nearly black at the base: leaves bright green, linear, about Ij/^ inches 

 long: cones small, %-l inch long; scales orbicular or ovate, rounded or 

 emarginate at the apex, lustrous, about 20 or more. Northeastern Asia. — 

 Introduced to Great Britain in 1827. Hardy probably as far north as 

 Saskatchewan, but rare in cultivation and scarcely of value as an orna- 

 mental tree. 



Var. japonica, Regel {L. kamtchatica, Carr, L. kurilensis, Mayr.). Kurile 

 L. Young branchlets reddish and often bloomy, pubescent. Saghalin, 

 Kurile Islands. — Introduced in 1888 to Europe by Dr. H. Mayr and in 

 1894 to the Arnold Arboretum where it has proved perfectly hardy and is 

 growing well. 



Var. Principis Rupprechtii, Rehd. & Wils. {L. Prlncipis Rupprechtii, 

 Mayr). Cones larger, to 13^ inches long; scales 30-40, truncate at the apex; 

 bracts at least on the lower part of the cone more than half as long as the 

 scales. Northern China. — Introduced to Europe by Dr. H. Mayr in 1903 

 and to the Arnold Arboretum in 1909 by Wm. Purdom. It is perfectly hardy 

 in Massachusetts and is growing well. 



7. L. laricina, K. Koch {L. americana, Michx. L. microcarpa, Desf.). 

 American L. (Tamarack. Hackmatack). Tree to 60 feet tall, with hori- 

 zontal branches, forming a narrow pyramidal head, sometimes broad and 

 open on older trees; bark reddish-brown; branchlets slender, glabrous, 

 reddish-yellow, often bloomy; winter-buds reddish-brown: leaves linear, 

 obtuse, 1-1 H inches long, of light bluish-green color: cones small, oval or 

 almost globular. 



