NOTES ON PLANTS FROM SKYE 167 



Utricularia ochroleuca Hartm. Peaty edges of Loch Cil 

 Chriosd ! 



Scutellaria minor Huds. Eiver bed, Sligachan. 



S. galericulata L. Beach at Dun an Aird, Sligachan. 



Stachys imlustris x sylvatica. Portree and Sligachan. 



Plantago lanceolata L. var. '^^sjjhcsrostachya Kohl. Loch 

 Sligachan ! 



Atriplex laciniata L. Shore, Brittle ! 



SucBcla maritima Dum. Very scarce, from Dun an Aird to 

 shores of Loch Sligachan. 



Polygonum amphihium L. var. terrestre Leers. Cultivated 

 land and stream-side, Brittle. 



Bumex domesticus Hartm. Abundant at high-water mark from 

 mouth of Shgachan Loch to Dun an Aird. 



Salix caprea L. Dun an Aird, near Sligachan ! 



S. cinerea L. Cliffs, Brittle ! 



S. alba L. Near Portree in a wild situation ; probably spread 

 thence from cultivation (see Journ. Bot., 1884, p. 368). 



"^Epipactis ovalis Bab. Limestone pavement, Ben Suardal, 

 near Broadford, very scarce ! 



Juncus trifidus L. Corrie Greta. 



Potamogeton heterophyllus Schreb. Loch Lonachan ! 



-''Buppia rostellata Koch. Abundant in a shallow pool. Dun an 

 Aird, near Sligachan ! 



Heleocharis icniglumis Link. Stony shores of Loch Lonachan ! 

 Mr. Wallis also sent specimens, in ripe fruit, from Uig, where it 

 was reported some years ago by the Messrs. Linton (see Journ. 

 Bot., 1884, 368). 



H. p)alustris and H. uyiigkimis are doubtless closely allied, 

 indeed, they are considered as synonymous by C. B. Clarke (Journ. 

 Bot., 1887, 267), who also remarks (B. E. C. Eep., 1897, 570) that 

 wiiglu7nis " is diagnosed as differing by the lowest bract sheathing 

 the culm nearly (or quite) all the way round at base ; an indefinite 

 character that cannot be worked." Hence, I was much puzzled 

 by some of the Skye examples having the outer glumes not by any 

 means encircling the spike, although the fruit seemed correct for 

 2miglumis. This caused me to make a closer examination of the 

 two plants, with the following results. 



It appears that whilst in H. uniglumis the lowest glume 

 usually practically completely encircles the spike (as is well shown 

 in specimens from Castlegregory, S. Kerry, gathered in 1902 by 

 the Eev. B. S. Marshall, and others from Little Sea, Dorset, 

 collected by Mr. Pugsley in 1913), yet occasionally, as in these 

 Skye examples, it encloses barely three-quarters of the circle. 

 Mr. Townsend noted this point in Fl. Hants., 645 (1904), when 

 describing some living plants from Kedbridge. 



On the other hand, in H. palustris the glume encloses about 

 half the circumference of the spike, rarely more, and never com- 

 pletely encircles it. Apparently, too, the membranous margin of 

 the glumes is not so pronounced in ^miglumis as in palustris, and 

 the colour, in the former, seems of a richer chocolate-brown. 



