SLATER : FLORA OF RIPON. 1 67 



district, but the flora of that region has been 

 completely modified since the draining of Staveley 

 Carrs, and I do not know whether this plant survives 

 or not. 



1260. Elodea canadensis. Water thyme. Still and running 

 water, abundant. This plant seems to be materially 

 decreasing in abundance in the Ripon district. 



1263. Orchis pyramidalis. Pyramidal orchis. Pastures, 



&c., on limestone, common. Near Masham ; Thieves' 

 Gill ; Newby ; remarkably fine and plentiful in the 

 field next Mackershaw wood ; &c. 



1264. O. ustulata. Chocolate-tipped orchis. Fields, pre- 



ferring those on limestone, common. Clotherholme ; 

 Thieves' Gill ; Bridge Hewick ; near Tanfield ; &c. 



1268. O. Morio. Green-winged orchis. Meadows and pastures, 



those on limestone preferred, not uncommon, and 

 nearly always found in company with O. ustulata; for 

 which see the localities. 



1269. O. mascula. Early orchis. Moist meadows and 



(occasionally) woods, common. 



127 1. O. incarnata. Light marsh orchis. Marshy fields, 



uncommon. Marfield, Masham ; Sharow mires 

 (scarce) ; Cowmire, near Galphay (Miss Morton). 

 May be easily distinguished from the following by the 

 bracts, all of which exceed the flowers ; by the leaves, 

 which are gradually narrowed from the base, and 

 hooded at the tip ; and by the colour of the flowers, 

 which are much lighter, sometimes approaching a flesh 

 colour. 



1272. O. iatifolia. Dark marsh orchis. Marshyfields. Baines 



calls this plant common in Yorkshire, being unaware 

 of the difference between this and the foregoing. I 

 think I may safely say that every marsh orchis found 

 near Ripon will be found to be of species 1271. 



