MENTHA—ORIGANUM. 349 
Aysgarth, Wensley, Spennithorne, Nunwick, Mawnby, Sowerby, 
Woodend, Kilvington, Gayle Beck, Gate Helmsley, Strensall, 
Stockton Forest, Cotter Foss, Barton-le-Street, Pickering, Hack- 
mess, Cle. 
Mentha piperita L. English type. Native. Area 9 8 7 
6.321. Range o-300. Frequent in watery places in the low 
country, ascending in Wensleydale to Carperby and Cotterdale, 
in Gretadale to Brignal. 
Mentha aquatica L. British type. Native. Area general. 
Range 0-500. Common in watery places, ascending in Teesdale 
to the plateau of Holwick Fell. 
Mentha sativa I.. including rubra and gentilis. British 
type. Native. Area general. Rangeo-250. Frequent in watery 
places, ascending to Lonton and the Yore side below Hawes. 
Mentha arvensis L. British type. Colonist. Area general. 
Range 0-300. Common in cultivated fields throughout the 
lower zone, ascending to the oat-fields of the Hambleton 
plateau, and in Wensleydale to Hawes; J. Percival. 
Mentha Pulegium L. English type. Native. Area 6.3.1. 
Range o-ro0. In several places in swamps amongst the heaths 
of the Central Vale and Howardian tract ; Monckton, Haxby, 
Stockton, Strensall, Flaxton, Terrington. Reported also from 
Moorsholm in Cleveland. 
Thymus Serpyllum L. British type. Native. Area 
general. Range 0-800. Common upon dry banks, especially 
amongst the hills, ascending to the Main Limestone of Cam Fell, 
Widdale Fell and Mickle Fell. 
Thymus Chamedrys Fries. inglish type. Native. 
Xerophilous, Area 3. Range 100-150. Upon the calcareous 
Howardian terrace in the quarry outside Kitscrew Wood near 
Hovingham. 
Origanum vulgare I. British type. Native. Subxer- 
ophilous. Area general. Range 0-450. Frequent in the 
woods and thickets of the limestone country upon both sides of 
the Central Valley, ascending to the Main Limestone Scars of 
May 1892. 
