202 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY, 



serrate or lobed at least on upper half, suddenly constricted into 

 a distinct petiole (which in the early foliage may be broadly winged), 

 usually mealy, especially the scales, certain species quite glabrous, 

 others puberulous or even tomentose. Inflorescence solitary or 

 few-flowered and umbellate ; scape as long as the leaves or a little 

 longer. Corolla tube most frequently not much longer than the 

 calyx, lobes emarginate or toothed. Bracts forming a i-seriate 

 involucre, but never thickened nor gibbous below. 



* North-West Himalayan Forms. 

 f Leaves glabrous, spathulate to ovate rotund, sheaths often prominent (except 

 P. Stirtoniana, which has the young leaves sometimes glandularly puberulous). 



40 (43, 44, 45).* P. petiolaris, Wall. ; Simla to Kumaon (var. scapigera in 

 Bhutan), Sikkim and Yatung, Tibet, var. Edgeworthii has rotund leaves on long 

 petioles. 8-10,000 feet. 



41 (51). P. Clarkei, Watt ; Kashmir, 7,000 feet. 

 42. P. reptans, Hook. f. ; Kashmir, 15,000 feet. 



** Central and Eastern Himalayan Forms. 



43 (40). P. nana, Wall. ; Sikkim, 11-13,000 feet. (A dwarf plant with flowers 

 very small and leaves thin in texture and erose, otherwise P. petiolaris ; it flowers 

 late in autumn.) 



44 (40). P. Stirtoniana, Watt ; Sikkim, Kanglanamo, 14-16,000 feet. 



45 (40). P. Hookeri, Watt ; Sikkim, 12,000 feet. 



46 (47), P. Dyeriana, sp. nov. ; Sikkim, Nepal, 13,000 feet. (Collected by 

 Mr. Hartless.) 



47 (46). P. pulchra, Watt; Sikkim, Jongri, 12-14,000 feet. 



tf Leaves usually puberulous or tomentose, rotund, and possessed of distinct 



petioles. 



48. P. reticulata, Wall.; Nepal and Sikkim, 11-15,000 feet. (This in some 

 respects recalls P. sikkimensis and is also glabrous.) 



49. P. rotundifolia, Wall.; Kashmir to Sikkim, 11-13,000 feet. (Almost 

 glabrous.) 



50. P. Gambleiana, Watt; Sikkim, Jongri, 14,000 feet. (Almost glabrous.) 

 51 (41). P. filipes, Watt ; Bhutan on rocks, 5-6,000 feet. 



52. P. Forbesii, Franch. ; Shan States, Burma, 3,000 feet. 



53. P. Listeri, King ; Sikkim to Manipur in bamboo jungles; 10,000 in former, 

 and 7,000 to 8,000 feet in latter. 



54. P. vaginata, Watt; Sikkim, 10,000 feet. 



55. P. mollis, Hook. ; Bhutan. (A near ally of P. cortusoides and P. sinensis.) 



56. P. geraniifolia, Hook. ; Chumbi Valley, Sikkim, 10,000 feet. (A near ally 

 of the European and Siberian P. cortusoides.) 



B. LEAVES CONDUPLICATE IN VERNATION. 



Section 6 : Floribunda. — Leaves glandular pubescent, some- 

 times mealy, obovate-spathulate to elliptic obtuse, narrowed into a 

 winged petiole, coarsely and irregularly toothed. Inflorescence 

 umbellate and verticillate. Corolla yellow, tube long, lobes obcordate, 

 small. Bracts few, large, leafy. 



57. P. floribunda, Wall. ; Kumaon to Kashmir and Afghanistan, 1,500 to 

 6,000 feet. (Allied to the Arabian and Abyssinian P. verticillata and P. sinensis.) 



58. P. Lacei, Hemsl. et Watt ; Yorkhan, Baluchistan, 4,000 feet. 



* See footnote on p. 199. 



