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SUMMARY:
From Ganju Tang, the writer records a long march over the Rudo La from 5:00 am to 2:00 pm, with rain and mist on the east side and dry conditions on the west. They note more rhododendrons on the east and report collecting about 21 alpine flowers, including several Primula species and Diapensia.

CONTENT:
18th Rhod. list. sp. 18887.
glaucophyllum 18887
pendulum 18888
cinnabarinum 18889

circumstances.

18th May Ganju Tang. A long march over the Rudo La taking from 5:00 am till 2:00 pm. I was lucky I had a mule which nobly carried me to the top of the pass with hardly a bit left out. We took from 5:00 till 10:00 to reach the pass, and it was through rain and mist all the way. Curiously, the mist disappeared on the west side. There had been no rain this side all day. It is obviously a much drier side, as the flora showed that. The East side is the one for Rhododendrons without a doubt. There are many more on that side. Primula elongata (18897) was not seen on the East. Primula hookeri not on the west. Altogether we got 21 flowers today, all nice. How pleasant to see alpines again after all the low muck I've seen for 2 weeks or more. Primula calderana (18890), elongata (18895), hookeri (18896) and smithiana (18900) were taken. Primula sikkimensis only in bud. We also got Diapensia (18891), but saw no Bry

SUMMARY:
Notes describe travel from Singo Samba along the left bank through fir forest, with crossings of the Lanyong Chu, open yak-grazing areas, and a camp on a slope. Botanical observations include several Primula species in Singo Samba and the Lanyong Chu Valley, with a query about a yellow form from east of Brumban, and mention of a route from Lanyong to an upper bridge.

CONTENT:
29a

From Singo Samba, continue up the L bank on aft bearing of 230° for 1 mile; river then bends again to 345°. Path up stream in fir forest, with a few clearings every now and then. Thin cliffs on the right hand side. Fit for yaks grazing.

2675 Continue up valley for 6 miles to pick hub, on L bank. Cross Lanyong Chu at m 1½, return at m 3. Valley has many open spaces, used by yaks as summer grazing ground. Camp on slope. Good. Line of valley approx 260° M.

3848. Primula prenantha. Singo Samba. Very common.

3849. Primula wattii. Lanyong Chu Valley. Growing in great quantity, covering whole swamps. Does the yellow form from E. of Brumban?

3850. Primula wessa. Lanyong Chu Valley. This again is not at all like the type 2514. It seems to be much more like P. nivalis, or like no 2189. (Nipa?). But it is not yet fully out.

3851. Primula hookeri. Lanyong Chu Valley. An odd plant. It was low, but on a valley bank, presumably brought down by the stream.

From Lanyong to upper bridge 10 miles, down L bank, the first four miles at the same bearing as

SUMMARY:
The writer describes a steep route over open hillsides to the Dza La, then a very steep descent toward the Tsokar, noting firs, a hut, and a glacier by the lakes. A small white Meconopsis was found; during a halt above the Nga La, additional Primula observations were made, and Ludlow brought in a specimen.

CONTENT:
then a steep ascent again over open hillside to the Pangha at m 5 1/2. Here again there is a drop, this time steeply for about 300 ft, then ascent gradual through rhododendrons to open stony valley reached at m 6 1/2. Thence more or less E to the Dza La at m 8. The last mile is steep over stony hillside. Descent of E side very steep at first. The Tsokar consist of 2 small lakes about 2 1/2 m behind the Dza La and 2000 ft below. Beside the lakes are fir trees and a hut. A glacier falls very steeply into one lake. Found today a little white Meconopsis (Mec. argemonantha) 2531 which does not seem to answer to M. lyrata or primulina, though near the latter. Otherwise nothing much of interest. P. Valentiniana is very common on the right of the path going to the Dza La.

1st September. Halt. Camp above Nga La. A lovely day, with mist coming up in the evening and some thunder then. Afterward cleared up and was very pretty. Went up the steep valley directly behind camp, and came across one new, but uninteresting primula (P. hookeri) 2535. There were also P. Valentiniana, P. Jonardunii, P. nivalis sp., P. 1621 (Tsariensis), P. Cawdoriana, and a very small one, none in flower. Ludlow brought in one 2536 (Caveana) which seems to be an Obtusifolia primula, also no flowers.