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144 ON THE FLORA OF THE YORKSHIRE COALFIELD, 
graph of Mexican ferns do not find that he knows any C. tomen 
as a Mexican species. I incline still to follow Kunze unless Mr. 
Watt can show that he is wrong. 
3. Lam not aware of any publication of Mr. Watt’s name Janugimosa 
earlier than 1864, whilst gracilis goes back, as Mr. Watt. shows, to 
1850-2. Riehl’s publication is simply a set of specimens with prin 
tickets. We have one of the sets laid into the Kew Herbarium, but I do 
not find in it this Cheilanthes. At any rate Fée’s figure is a very 80 
one, and quite settles the question so far as the plant intended by him 
is concerned. There isanearlier Cheilanthes gracilis of Kaulfuss which 
is our Pellea Stelleri. Probably it was on account of this that Eaton 
did not take up the name gracilis. 
ON THE FLORA OF THE YORKSHIRE COALFIELD. 
place. abigh 
any plants seem to flourish with compensating luxuriance in a 
the 
and Equisetum arv with Convolvulus arvensis (in parts) ™ ye 
open; Zanacetum, Petasites and Alder by the slower,river banks ; d 
in the woodlan ychnis diurna, Allium ursinum, the int cs 
Pieris for a carpet, Birch and stunted Oak for the shelter, 
unfruiting Hazel for the undergrowth. itions 
Water plants are naturally but little affected by the nie 
1 ae Wik = a of land ones, so that we find ci the ae 
oe ield the paucity of hygrophilous species not quit’ 
ee et the own distric® 
amongst these are no doubt wanting, and such as Hydr ocharté ae 
always been so; but a consideration of levels will partly expla 
absence of these; whilst a still greater number (especially recent 
love clear water) have been eradicated within a comparatively the 
period, much in the same way as the trout and pike, throug |= 
multiplication of facto ries, Seadoeen uses, tanneries and bleach works 
