DICOTYLEDONES. 67 
378. S. NIGRICANS (Sm.), Dark-leaved Willow. 
One of the rarer salices; Groundwater, Orphir (Dr 
Boswell). I have a few specimens which Mr Ar. 
Bennett says are doubtful, but thinks they are 
repens X nigricans. 
379. S. AMBIGUA (Ebrh.) Not common. 
380. S. REPENS Linn., (Dwarf Willow). 
Var. fuscu. Common in sandy places (Dr 
Fortescue.) Two specimens I have are hybrids of 
S. ambigua and S. repens (Mr Ar. Bennett). 
Var. parvifolia (Sm.), (Westray, 1905). 
381. S. HERBACEA (Linn.), Least Willow. 
I have specimens from Hoy (July 1902) which Mr 
Bennett says are the largest leaved specimens he ever 
saw. Neill, in his botanical tour through Orkney in 
1804, reported S. Lapponum, S. Arbuscula, S. Acu- 
minata, and S. Angustifolia, but no confirmation of 
these has been made either by Dr Fortescue or others. 
382. S. RETICULATA (Linn.), Reticulate Willow. 
This plant is given in Dr Fortescue’s list as found 
in Hoy Hills by Mr Heddle. 
383. S. MyrsInives (Linn.), Whortle-leaved Willow. 
Very rare. Hillside, Glen of Gair; Ward Hill, 
Hoy (July 1883, Col. H. H. Johnston, C.B., and Dr 
Fortescue). Dr Fortescue says :—“TI believe this 
plant from Hoy has been taken as the type.” 
