^AND LLONAKE VALLEYS OF SIKKIM 
193. Pieris D. Don. 
534. Pieris ovalifolia D. Don. 
Lachen^ Zemu and Lachung, 7-10_,000 it., Nos. 2718, 2719. 
Common. 
635. Pieris Villosa Hook. f. 
, Lacben, 9,000 ft. Sparingly. 
536. Pieris formosa Don. 
Lachen and Zemu, 8-10,000 ft., Nos. 962, 2720. Frequent. 
193. EnkiaiUhus Lour. 
637. Enkiaiitlius. himalaicus H. f. & T. 
Lachen, Zemu Valley, and Lachung, 8-10,000 ft., Nos. 1016, 
1062, 2592. Not uncommon. 
194. Diplarche H. f. & T. 
538. Diplarche multiflora H. f. & T. 
Zemu Valley and Yumchho La, 12-15,000 ft., No. 1272. 
539. Diplarche pauciflora H. f. & T. 
Zemu Valley, 14-15,000 ft.. Nos. 1363, 1539. Both species extend 
up to and along the sides of the Zemu glacier and form a conspicuous 
feature of the sparse vegetation beshie the melting snow on the sur- 
rounding slopes. 
195. Rhododendron Linn. 
5.30. Rhododendron vaccinioides Hook. f. 
Lachen, 8,000 ft., No. 948. 
531. Rhododendron grande Wight. 
Lachen. 
533. Rhododendron Hodgsoni Hook. f. 
Very common above Lachen and in Lower Zemu alley, forming 
t/he chief constituent of the Bhododendron jungle from 9-11,000 ft. 
533. Rhododendron Falconer! Hook. f. 
Frequent, especially above Lachen. 
534. Rhododendron arboreuiii Sm. 
Zemu Valley 8-10,000 ft.. No. 2780. 
535. Rhododendron campanulatum Don. 
Zemu A^alley and Yumchho La, 11-14,000 ft.. Nos. 1204, 1304, 
1252. Very common and along with R. Wiijhtii forms dense ^ jungle^ 
on the slopes of the higher valleys. 
