At Miru we found that we had completely left the rainy region of the mountains, and henceforward the weather continued beautiful. The change had been very gradual. At Serahan we had heavy rain; a rainy night at Tranda was succeeded by a brilliant day, till the afternoon, when it rained smartly for an hour. The next day was again fine, and at Miru, though the afternoon was cloudy, and a heavy storm was visible among the mountains across the Sutlej, only a few drops of rain fell. The transition from a rainy to a dry climate had thus been apparently very sudden, four days having brought us from Serahan, where the periodical rains were falling heavily, to a place at which there were only light showers. This was in part, of course, accident. Fine weather may, perhaps, have set-in in the interval in all parts of the mountains. In very rainy seasons, when the rain-fall in the outer Himalaya is considerably above the mean, heavy showers extend into Kunawar, at least as far as Chini; and careful meteorological observations would probably show that the transition of climate is a very gradual one, the snowy mountains and the great spurs which run towards the Sutlej collecting and condensing, as they increase in elevation, more and more of the moisture which is brought by the south-east winds from the Bay of Bengal.
VEGETATION OF KUNAWAR.
August, 1847.
Jacquemont, in the valuable journal of his tour in India, which has been published by the French Government, has observed that the passage of the ridge between Chegaon and Miru may be considered as producing a marked change in the vegetation. This change, as we have seen during our journey up the Sutlej, had long been going on, though very gradually and almost insensibly. Several circumstances combine to make the transition appear at this point more sudden than a careful calculation of the number of new species will prove to be the case. It is the first wooded ridge on the north side of the Sutlej over which the road passes, and it rises higher than any other part of the route east of Nagkanda. A considerable effect is also produced by several new arboreous or shrubby species making their appearance, as well as by the fact that the new forms, which day by day have insensibly been increasing in number, have at last begun to form a prominent feature in the country.
I find among my notes a list of all the species of plants which came under my observation during the walk from Chegaon to Miru. Their number is rather above 150 species, of which number about 120 are common Simla plants. Of the remaining thirty, eleven were quite new to me, ten had occurred only the day before, and nine had been common for some days past. These numbers convey a very different idea of the amount of change from that produced at the time, but the latter must be admitted to be very fallacious, the eye of the botanist being so naturally attracted by novelty, to the utter disregard of what is common, that it is difficult to preserve the degree of attention requisite to observe properly.
QUERCUS ILEX.
August, 1847.
Pinus Gerardiana produces a very large cone, containing, like the stone-pine of Europe, eatable nuts, of an elongated oblong form, which, when roasted like chesnuts, are agreeable to the taste, though with a little flavour of turpentine. This tree has been repeatedly tried in the rainy districts of the Himalaya, but will not succeed, a dry climate being essential to it. Besides Gerard's pine, a new species of oak was the most conspicuous tree, forming a thick dry wood on western exposures. This oak, the only species of the genus which grows in the interior of Kunawar, is the Quercus Ilex. The specimens which I collected quite agree with the European plant, and belong to that form of the evergreen oak, which has been called Q. Ballota. The same tree is common in some parts of Affghanistan, where it is called Balút. A small graceful ash was also common, and species of Stellaria, Lychnis, Dianthus, Herniaria, Cruciferæ, Senecio, and Valeriana, which, with several Chenopodiaceæ and Artemisiæ, were the new species observed.
VIEW OF THE SUTLEJ.
August, 1847.
On the morning of the 16th of August, we proceeded to Rogi, eight and a half miles. On leaving Miru the road at first ascended gradually through a pretty wood of deodar and Gerard's pine. The common pear-tree of the Himalaya, and many of the more ordinary Simla shrubs, species of Desmodium, Indigofera, Spiræa, Buddleia, and Plectranthus, were common under the shade of the pine-forest. As the elevation increased, the trees gradually diminished in number, and the road continued to rise along the side of a rocky hill, with only a few scattered deodars. A very pretty reach of the Sutlej now came into sight. The river was broader than usual, and seemed to flow with a gentle stream along an even bed, without interruption from rocks. Opposite the junction of the Miru tributary, which was in sight at the end of the reach, the Sutlej was particularly wide, and its channel was divided into several branches, which enclosed a number of gravelly islands, immediately beyond which the stream again contracted in width, and resumed its usual rocky character.
From the top of the steep ascent, which must have exceeded 9000 feet in elevation, the road continued along the side of the hill, without much change of level. The slopes were nearly bare, a few trees of the deodar and Gerard's pine only occurring occasionally. The latter tree was more common, and larger than the day before. It is a compact small tree, with much-twisted ascending branches, and a mottled grey bark, quite smooth from the decortication of the outer layers. It bore abundance of large pendulous cones, the size of a small pine-apple, still quite green.
BURANG PASS.
August, 1847.