138 MR. W. B, HEMSLEY ON THE 
Hippophaé rhamnoides. | Scirpus Caricis. 
Parietaria debilis. | Hierochloa laxa. 
Ephedra vulgaris. | Deyeuxia scabrescens. 
Juniperus communis. | Avena wnea. 
” Pseudo-Sabina. _ Danthonia cachemyriana. 
” macropoda, | Bromus tectorum. 
Allium Victorialis. | Agropyron longearistatum. 
Potamogeton pectinatus. %» semicostatum. 
Scirpus setaceus. | Elymus sibiricus. 
As the distance from Milam was increased, the vegetation 
became more and more scanty and the last bushes worthy of the 
name (Juniperus communis) were passed a few miles south of 
Shelong, 12,800 ft. The height of the Pass of Unta Dhura is 
17,530 ft.; and vegetation reappeared on the north face, after a 
descent of about 500 ft., with Cheiranthus himalayensis, Els- 
holtzia eriostachya, and dense, cushion-like masses of Thylaco- 
spermum rupifragum, a foot or more in diameter. The vegetation 
of the ascent to the Pass of Kyungar (17,500 ft.) was very sparse, 
but a few plants were noticed almost to the very top, namely, 
Eritrichium spathulatum, Microula Benthami, Urtica hyperborea, 
Taraxacum officinale, Ranunculus hyperboreus, Arabis alpina, and 
Thalictrum minus. The only fern of these regions is Cystopteris 
Sragilis. The Balch ridge rises to upwards of 18,000 ft. ; but this 
range hardly comes within the limits of perpetual snow, and 
phenogamous vegetation exists to the very summit, within a few 
teet of which Allardia tomentosa was growing freely. Here also 
were found two species of Sausswrea (so numerous at high 
elevations), namely, 8. Hookert and S. bracteata, and Nepeta 
bracteata and Arenaria musciformis. On the descent from the 
Balch Dhura Pass, which we take as the entry into Tibet 
Proper, at about 17,000 ft., vegetation reappeared somewhat 
freely ; and by the side of a small stream, which to the north of 
the Indian watershed is essential to any approach to vigorous 
vegetation, several new plants were found, among them: Gentiana 
nubigena, Draba lasiophylla, Pedicularis versicolor, P. rhinanth- 
oides, P. cheilanthifolia, and some grasses and sedges, including 
Trisetum subspicatum, Deschampsia cespitosa, and Carex ustulata. 
At Tisum (14,690 ft.) Stracheya tibetica was discovered, and among 
other new plants were the following :—Alyssum canescens, Stellaria 
graminea, Potentilla Anserina, Saussurea glanduligera, Crepis 
glomerata, Parnassia ovata, Scopolia prealta, Salsola Kali, and a 
few grasses, such as Stipa purpurea, S. orientalis, S. sibirica, 
