Joy 1907.} RICCI OF THE EDINBURGH DISTRICT. 287 
around Edinburgh, but, apart from the reservoirs, I have only 
once certainly collected the true glauca, namely, in a field 
near South Queensferry in November 1905. &. Lesewriana 
grows on the coast at Dalmeny, where it was first detected 
by Mr. M‘Andrew in October 1903. When once known, 
sorocarpa is easily distinguished from glauca and Lesewriana, 
but these last two, in some of their forms, are not so readily 
separated from each other. There are, however, structural 
differences, such as the size of the spores, which specialists 
rely on. In cross section sorocarpa is more distinctly V-shaped 
than the others. 
So far as I am aware, only one other Aiccia, namely, 
R. bifurca, Hoffm., has been obtained in Scotland. Mr. 
Maevicar records it from Mid-Perth (“ Transactions” of this 
Society for 1902, p. 232). 
The distribution of the five species among our reservoirs 
in the autumn of 1905 is shown in the following table. 
Crosswood reservoir was also visited, but not till November, 
by which date the water had risen and covered any places 
on which Riccias may have grown. 
I may mention that another liverwort, Fossombronia 
cristata, Lindb., was growing plentifully along with the 
Riccias at most of the reservoirs. 
Photographs of living plants of the five Ricciw, taken by 
my son, W. Edgar Evans, are reproduced in the accompany- 
ing Plate. 
TABLE sHOWING DisTRiBUTION oF Riccias aT THE RESERVOIRS 
AROUND EDINBURGH IN AuTUMN oF 1905. 
Reservoir. | 
. s SNe aks | ecsall (ated! ek Mtssral lero] eee Mar seal Pace 3 | 
Speciosot lain i eis (elF/Slelelelelelel el 
Riceia. mars esto ey Pome | sheet |e fie | Fl |S | Bp ayia | 
ree cel ee pe Oo Wea or pect fre (RT eat cont 
Set Ke Po a eb = | om Alismis il Soia = > 2 
ae irae Fea} i) 3 oS o|/H}]2 = e/SBiasois =] 
Bilis = > lm] Ss] 2/2 Seah Sate. eae ies 
Eel SiH Slmleolezlals/S/A] 3 | 
exe ms oO —_ Ss 
ea pias Pa isa eres et We ee Ce TT | | 
R. sorocarpa, } | 
BInCh ame eer pose LG) fee a Gene p<. ba oe Peoxerhesee ese tis: bell x1 Seal 
; | | 
} 
R.glauca,L.  . 5 il Map can Rip apd | Uo us ae [xe x 
| | } 
R. Leseuriana, 
~ ! 
Aust. | x Xx x } 
| 
R. erystallina, L. | x | x pan bs x 
R. fluitans, Ll... x | Xx 
