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IV. Descriptions of those species of Polygonum and Fagopyrum which are 
contained in the Indian Herbarium of J. Forges Royce, Esg., F.L.S., &c., 
late Superintendant of the H.E.I. Botanical Garden at Saharunpore, and 
now Professor of Materia Medica in King’s College, London. By Cnakixs 
C. „ Esq., M. A., F. L. S., F. G. S., &c. : 
Read December 20th, 1836. 
MY friend Professor Royle having done me the honour to submit to my ex- 
amination and description those species of Polygonum and Fagopyrum which are 
contained in his extensive Indian Herbarium, I have now the pleasure of com- 
municating the result to the Linnean Society. After the valuable monograph 
by Professor Meisner upon the Wallichian Polygoneæ, published in the third 
volume of the Plante Asiatice rariores, it was not to be expected that many 
new species would occur in this collection. I was therefore the more pleased 
by finding not fewer than ten totally distinct forms amongst the natives of 
the Himalayan mountains and the upper provinces of India. I would parti- 
cularly direct attention to the tribe Avicularia, in which Dr. Wallich's herba- 
rium is peculiarly deficient. Meisner describes four species, all of them very 
closely allied to P. aviculare, Linn., only one of wbich occurs in this collection, 
but the other three are replaced by five most interesting plants, only one of 
which appears to have been previously noticed. 
In all cases in which I have been able to identify my E with those of 
Professor Meisner, I have adopted his specifie characters, but have always 
drawn my detailed descriptions from the Roylean specimens which I had before 
me. My friend, Professor Don, has most kindly given me his valugble assist- 
ance, and has added much to the value of this paper by identifying several of 
Meisner's species with those described by him in his Prod. F). Nepalensis. 
As this Bay has been so recently — in the Pl. Asiat. Rar., I have 
