74 FLORA ORCADENSIS. 
Var. nana (Syme). Rare; has creeping stems 
buried in the mud; Oyce of Firth. This plant, when 
found by Dr Boswell, was new to British flora. It is 
now found in several places in north of Scotland. It 
erows in considerable abundance below mill, Sebay ; 
and in Ross and western Sutherland (Ar. Bennett). 
Genus CXCIII.—ZOSTERA (Linn.), Grasswrack. 
408. Z. MARINA (Linn.) Fairly common. 
This plant grows very abundantly in Deersound, 
a little below low-water mark. It is driven ashore 
during gales, when farmers use it for thatching and 
manure. The soft, black mud in which it grows is 
called “ mallock” in Deerness. 
Var. angustifolia (Reich.) Not common. Shore, 
Deersound ; Oyce, Firth, &ce. This variety, Mr 
Bennett says, is the same as var. stenophylla of Asch. 
and Graebn. 
409. Z. NANA (Roth.), Dwarf Grass-wrack. 
This plant is given in H. C. Watson’s list, on the 
authority of Syme. It is a plant hkely to grow in 
Orkney, but has not been found recently, so far as I 
know. 
OrvER LITI—ORCHIDACE. 
Genus CXCIV.—ORCHIS (Linn.) 
410. O. MAscuLa (Linn.), Karly Purple Orchis. 
Westness, Rousay; Hoy. The only place where I 
have gathered it was on the sea-banks, Berstane. 
Glen of Gair, Hoy ; south-west of Kame of Hoy (1883). 
