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376 been supposed to occur in Mongolia and north China; but Maye has recently described the North China larch as a new species—Larix Principis Rupprechtii. In Siberia its most northerly limit is lat. 69° on the Yenesei and Kolyma, its southern limit extending from the Ural at lat. 54° to the Altai in lat. 52°.

The Siberian larch was reported by Kanitz to occur as a shrub in upper and middle Moldavia at about 6000 feet elevation. He identified it on the authority of Parlatore in a letter. I have seen no specimens from this locality, and consider the identification very doubtful.

An excellent account is given by Mayr of a plantation of this tree which was made in 1750-1760 for the Czarina Elizabeth at Raivola on the Russian-Finnish frontier north of St. Petersburg. The seed was procured from Ufa, and the trees have on the better land grown remarkably straight and clean without branches for 20 metres up, and attain 4o metres in height with a diameter of 70 centimetres. The wood of these trees, which was shown at the Paris exhibition of 1900, was of remarkably good quality, and Prof. Mayr recommends this tree strongly for cultivation. But as summer does not commence in Finland until June, and the trees had already turned yellow on September 18th, it is probable that the species is not unlikely to succeed in Great Britain except perhaps in elevated districts in the north and east of Scotland.

On my journey to Siberia in 1897 I saw larches in the Ural mountains near Zlataoust, but only after passing the watershed into Asia, and these were of no great size. In the Altai they first appeared at about 3000 feet, and at 4000 feet they became more numerous and larger, some of them 3 feet to 4 feet in diameter and about 100 feet high, but nearly all were dead at the top, and not yet in full leaf on 7th June. They grow scattered in open forest on the drier hillsides as well as on marshy flats, and where the soil is damper are often mixed with Picea obovata.

Farther to the south in the upper valleys of the Katuna and Tchuya the larch became the prevalent tree, and extends to a higher elevation than any other, following the banks of the mountain streams on the Mongolian frontier up to about 7500 feet. At this elevation I saw a grove of young larches from 8 to 15 feet high, and cut one of the smallest to count the rings, of which there were twenty-five in a diameter of only 1½ inch. Some of the old trees were remarkably stunted, only 10 to 12 feet high and 5 feet to 6 feet in girth. In this region the climate is extremely severe, frost and snow occurring even in July. The bark of the tree is used all over the region where it grows for covering the winter huts of the nomad Tartars, which are in shape and construction very like the lodges of the Indians in Montana.

It was introduced by the Duke of Atholl in 1806 from Archangel, as stated in the fourth volume of the Transactions of the Horticultural Society, p. 416, and