So 



Wheldon : The North of England Harpidia. 



Yar. Payoti Ren. Tufts submerged, pale green, vinous red 

 below. Stems long, slender, prostrate and intricately inter- 

 lacing. Leaves rather distant, erect patent, slightly flexuose, 

 not at all secund except at the extreme apex of the stems, 

 narrowly oblong lanceolate, finely but shortly acuminate, 

 slightly denticulate. Nerve reddish, thin, reaching sometimes 

 three-quarters. Basal cells often a little thickened and coloured. 

 Auricles strongly decurrent, sometimes a little swollen, but 

 not abruptly separated from the rest of the lower cells. The 

 habit of this plant is very marked. . . 



9. [Greenbank Fell {60), Wheldon and A Wilson ! ! This 

 was not quite typical, but agrees better with this than any of 

 our forms. Mons. Renauld said of our specimens 'ad var. 

 Payoti accedens.'] 



Var. submersum Schimp. A slender, elongated floating 

 form, with very distant, patent leaves, not falcate, from a broad 

 "base, with decurrent auricular cells, lax almost to the nerve, 

 hyaline, but little dilated. We have seen no specimens of this 

 collected in the North of England. Other forms are frequently 

 erroneously referred to it. A plant from Boltby, North York- 

 shire, collected by Mr. R. Barnes, approaches it nearly, but 

 I have not had the name confirmed. 



Var. setiforme Ren. Loosely tufted, submersed, of a 

 glossy yellow green above, passing to red and brown. Stems 

 of moderate length, straight, simple, or with a few very short 

 pinnae." Leaves erecto-patent, nearly straight below, and only 

 slightly secund at the extremities, very long (5-7 mm.), lanceo- 

 late, gradually narrowed almost from the. base, terminating in 

 a long setaceous point, with large recurved teeth. Nerve 

 narrow. Cells generally very long. Auricles small, of few 

 slightly-inflated yellowish cells. 



10. Flints Reservoir, Soyland, near Halifax (63), C. Cross- 

 land. 



Referred to this var. originally by Mr. Dixon, and accepted 

 by Mons. Renauld, as a form of var. setiforme somewhat 

 approaching var. gracile. It seems sufficiently distinct in its 

 colour and the erect spreading leaves, which are less narrowed 

 below. The Soyland specimens have a shorter leaf point than 

 the original specimens. 



Var. Robertsise Ren. & Dixon and var. squalidum Ren. and 

 Dixon, belonging to this group, should be looked for in the 

 North of England. They are described in Journal of Botany, 

 1901, p. 277. 



Naturalist, 



