214 TWO WILLOW HYBRIDs, 
Order Nostocacex. 
Nostoc — 
N. Linckia Born. = Monormia intricata Phye. Brit. Cumbrae ! 
Hennedy in "Herb, Brit. Mus. et D. R. “ Largs,’”’ M. 
AnaBzna Bory. 
A, variabilis Kitz. = — yga Thwaitesit Phyc. Brit. Cum- 
: in . Gr 
A.? Broome = 8S. Sindaat Thw. ‘Rare, Arran,’ M. 
Noputaria Mert. 
migena Mert. B. litorea Born. et Flah. = ange cag 
litorea oe Brit. Cumbrae! Hennedy in Herb. Brit. Mus. et 
Herb. Gre 
(To be continued.) 
TWO WILLOW HYBRIDS. 
By Epwarp F. Linton, M.A. 
course of my v 
which app a have not been ‘eeceibed, and I propose to deseribe 
of them without further delay. The freedom with which the 
pide in this genus hybridise, and the interesting fact that the 
resultant hybrids are often fertile and capable of blending with a 
third species, — topics which have been so well illustrated in Dr. 
F. B. White’s recent Revision of British ees that I will not 
here make any gece remarks on the subject 
X NIGRICANS, n. hybr, =I gathered the speci- 
mens I have of this some years ‘ago, but laid them in with other 
nigricans forms, as a variety which I could not name. They did 
oe rien a attention again till last year, when I was struck by 
s and fruit, and the facies of one of the ethan sop 
This has is leaves of the usual shape and size of S. Arbuscula L., 
crenate, pubescent at first on both surfaces, but becoming quite 
glabrous on the upper surface; very glaucous on the lower, and 
pon the pubescence persistent. In both specimens the leaves 
were the prevailing willows, and, as far as I remember, the only 
willows on this group of rocks, which are situated in the Breadal- 
banes, in Mid-Perth. The ot = the —o jitend specimen is 
gone and mostly y larger than in 
S. Arbuscula, but densely Geepacted, snide forming a broader setin 
than this parent ever does. The o ovaries, which are su 
have a fair amount of short genrer and a er style ans 
divided (apparently to the base), with stigmas shortl y bi 
My other specimens, gathered in 1858, in company with Rev. 
W. RB. — on the same in some from the 
rocks, differ respects 
TPhig. leaves ant are rather larger, and, being more pubescent 
