PLANTS OF CAITHNESS 173 



Orchis maculata, Linn., var. ericetorum (Lin ton). On the Holborn 

 Head sea - cliffs, and near Castleton and John o' Groat's. 

 The type occurs near Berriedale. 



Habenaria viridis, Br. A very stunted form with oval leaves grew 

 on the Holburn cliffs, which I think comes under the var. 

 bracteata. 



Orchis incarnata, L. Near Berriedale. 



Potamogeton natans, L. Near Berriedale. 



Schoenus nigricans, L. As a stunted form on the Scrabster cliffs. 



Carex aquatilis, Wahl. By the Thurso river. 



C. Goodenowii, Gay, var. recta (teste Kiikenthal), by the Thurso 

 river. 



C. Hornschuchiana, Hoppe, and C. flava, L. On the Scrabster cliffs. 



*Catabrosa aquatica, Beanv., nov. var. grandiflora, Hack., in lit. 

 Flowers twice the size of the type, with two florets. In a moist 

 sandy spot well above high-water mark near Downreay. A 

 conspicuous-looking plant growing in a very tufted form. 



Poa subccerulea, Sm. Rather common at Downreay and John o' 

 Groat's, less marked near Murkle Bay. 



P. annua, L. As a subperennial and upright tall plant, with larger 

 and more coloured spikelets and larger and more open 

 panicle, occurred in shell-sand at Murkle Bay. 



Agropyron junceum, Beauv. Murkle Bay, John o' Groat's, Reay, 

 etc. 



A. repens, Beauv., var. Vaillantianum, Schrank. Thurso. 



Agrostis alba, L., var. coarctata (Hoffm.). Scrabster, etc. Also as 

 a very dwarfed plant mimicking A. pumila, only of more tufted 

 growth, on the Holborn cliffs. 



A. pumila, L. Dunnet Links. 



Deschampsia caespitosa, Beauv., var. brevifolia (Parn.). Thurso. 



Festuca rubra, L. Common. 



var. barbata, Hack. John o' Groat's. 



var. juncea, Hack. In shell-sand at Murkle Bay. 



F. ovina, Z., var. paludosa, Gaud. Reay. 

 Equisetum limosum, L. Downreay. 

 E. palustre, L., var. nudum, Duby. In the Reay sands. 

 *Chara hispida, L. Downreay. 



