= 
Ae enh ee eae es 
Ne eae eee 
abot = pase Eines is 
PT na ee ee TE ee Le 
SOME WELSH HAWKWEEDS 3 
and degree of variegation, and to some extent in the arrangement 
of the branch-leaves, but — in nearly all cases a facies by 
which it can be readily det 
The crucial point is re course the position of ie s ohiororh yes 
cells, to ascertain which thei pi should be cut through the 
middle of the leaf; in many cases, however, en pre will 
reveal the situation of the enclosed cells. In focussing downwards 
the common wall of adjoining hyaline cells will be noticed pions 
the immersed dildecphy ides cells appear; it is of course necessary 
to repeat this process upon the other side of the lea 
o far as my own specimens indicate, the faint of the 
species is as follows :—England: Witherslack Moss, Westmoreland 
(Barnes, 1872); Teesdale (Dr. Mason); Widdy Bank Fell, peated 
ham (Horreli, 1899); Keston, Kent (Horrell, 1899). Scotland : 
Ben More (Diwon ¢ Binstead, 1897); Chapelton Moss, Hamilton 
(J. Murray, 1899). Ireland: Geashill, King’s Co. (H. W. Lett, 
1890). Mr. Lett’s Ea was named ‘8S, papiliosum var. confertum.” 
xon’s specimen from Ben More is certainly not the type; 
ier ore it is the se virescens alin 
EXPLANATION oF Puate 405. _Fig ig. 1. Plant, nat. size (Witherslack © Moss). 
2.-(Part of stem, with fascicle. 3. Stem-leaf, x 16. 3a. Ditto, apex, x 
Ditto, “oes above middle, x 280. 4. Bacheb: leaf, x 16. 4a. Ditto, cells 
m middle, x 280. 4b. Ditto, 1 transverse x 
SOME WELSH HAWKWEEDS. 
By Rey. Aveustin pe M.A. 
u 
to continental Ht orb and, aithoue I reste naturally te 
them before one or two of the leading students of this genus - 
England, and have received suggestions 0 nek value from thei 
kind criticism, corrections or alterations, if found —— bee 
entail responsibility on no one but the author of this paper 
1, Hieractum murorum L. ex parte, var. LucIDULUM, no 
Very near to H. murorwn var. to aciien Laestad., but differing 
constantly* from it in the following particulars :—Stem shorter 
pure white. Sia with a single leaf, whital is ovate-acute, ra 
Steere realbad, often placed low on the stem, or 0. Z 
B 
