56 PLANTS OF TIREE AND COLL. 



L., the last three bemg all prostrate. There is much prostrate 

 Juniperus communis L., and some Salix aurlta L. aud S. repens L. 

 A considerable number of Rubi occur, mostly confined to roadsides. 

 Four species were noticed : Rubus dninnoniensis Bab. and II. vilii- 

 caiilis, var. Sdineii (Liudeb.), rather common ; R. plicntus W. & N., 

 and R. danlcns Focke, rare. Specimens of these have been named 

 or verified by the Eev. W. Moyle Eogers. A few plants of Rosa 

 tumentosa Sm. and " /?. canina L." also occur. The soil is to 

 a considerable extent peaty, and on this account there are several 

 plants to be found which are apparently absent from Tiree, as 

 Utricularia minor L., U. intermedia Hayne, and Rijnchospora alba 

 Vahl. Calluna is abundant, and Erica Tetralix L,, and E. cinerea 

 L., are common. Ferns, very scarce in Tiree, are fairly common in 

 Coll, Lastrea dilatata Presl seemingly the most plentiful. Part of 

 the west and south shores are bordered with sand dunes in which 

 are many depressions, giving shelter to a most beautiful flora. On 

 the shore itself are found Cukile maritima Scop., Atriple.v Babini/tonii 

 Woods, Pohjijimwn Rait Bab., Afpopi/ron jiiiiceuni Beauv., and more 

 rarely A. acutum, B. & S.? A few yards inland is Ammophila, with 

 nearly the same vegetation as in Tiree, but more luxuriant, espe- 

 cially in the sheltered depressions, where also occur Vicia sepinm. L., 

 dwarf, with bright- coloured flowers; C/ni/santhemum Leucantheuium 

 Li., as a small-leaved form, and with usually only one stem ; Sonchus 

 oleraceus L., and Orchis pyramidal is L., the last being very rare in 

 Scotland, and this its most northerly known locality m this country. 

 Ammophila grows over the greater part of the dimes, but has fewer 

 flowering stems as it extends inland to the less pure sand. At the 

 junction of the dunes and cultivated fields are found Fumaria con- 

 fusa Jord., Papavcr dubium, L., P. Anjemone L., and Anagallis 

 arvensis L. The streams running through the dunes are partly 

 choked with quantities of Nasturtium ojjiciuale R. Br., and Veronica 

 Anagidlis-aquatiea L., while at the edges grow Epilobiuin obscurum 

 Schreb., Festuca elatior L., or Caj-ex distans L., the last being always 

 close to the shore, A yard or two of grassy ground on either side 

 of the stream gives room for Orchis macnlata L., O. latifolia L., and 

 0. mcarnata L. Where the stream joins the shore there is usually 

 to be found Catabrosa aquatica, var. littoralis Parn. Here also is the 

 most common locality for Tussilago Farfura L. In some of the other 

 islands Retasites takes its place. 



The most noticeable herbaceous plants of Coll which were not 

 observed in Tiree are Castalia speciosa Salisb. ; Melampynun pratense, 

 var. hians Druce, in quantity at the side of a loch ; Orchis pyramidulis 

 L. ; Potamof/eton coloratus Hornem., an extension of range northwards 

 from the Clyde, I believe ; Scirpus lacustris L. — in Tiree, where all 

 the lochs are almost at sea-level, S. Tabernamontani Gmel. only is 

 found; Cladium jamaicense Crantz, Aira car i/ophy Ilea Ju., Phragmites, 

 Carex Jiliformis L., Osmunda regalis L,, and E(]uisetum> si/lvaticumlj. 

 Batrachian Ranunculi are scarce in Coll, but common in Tiree. Ana- 

 gallis tenella L. is vei'y common on both islands. No Hieracia were 

 seen on either island, except H. Pilosella L., on the sand dunes on 

 both. Drusera rotundifolia L., and D. intermedia Hayne are common 



