RANUNCULUS ACER L. 879 
I take this opportunity of eee Fag Bares with the new 
genera described in this paper, some alge ently described by me 
in this Journal, but of which ad figures were wer at the time of 
publication. 
EXPLANATION oF Prater 414. 
1-2. Porphyrodiscus rem Batt.:—1. Transverse section of frond 
2. Por 500. 
enough a@ sorus x 50. ort oe same, 
3-7. ot sabres mis Allen —3. Transverse section of frond with 
te pthans x 200 —5. Simple ae” nched nemathecial filaments, x 500. 
6. Transverse | eae through edge of sorus, x 500. face cells, x 30 
igs. physema Georgii:—8. Plant, nat. size, on t leaf. 
. pinster of fronds, Section of frond, x 50. 11. Ditto of roe frond 
e paraphyses, x 500 urface cells, 
. 10 : ‘ 
Tie. on Trailliella intricata Batt.:—14. Branch with tetraspores, x 1 
Figs. 15 & 16. Helminthocladia Hudsoni J. Ag. sor Tetrasporic van 
nat. size eriphera ments with Eg oe ; 
5 oy Bs Pa a Brebneri Batt. :—17. Totvanpet ‘branch, x 300. 
Figs. 18-2 vea repens :—18. Plant in situ, x 10. 19. Po =e of same, 
x 300. 20. Part of frond after the on us the spores, x 300. 21. Germi- 
nating spores, x 300. 22. Young frond, x 
RANUNCULUS ACER L. 
By Frepertck Townsenp, M.A., F.L.S. 
In the Journal of Botany for 1889, p. 140, I published a short 
paper ra ey. the late Prof. Kerner’s views rH the Pidernn ds seer iestp 
of Ranunculus Stevent and R. acer L.* He enized 
these as ee species, one with and one without a aieéping ie ape 
described tae forms of the latter, one of which—viz. R. Friesianus 
nsidered identical with R. Steveni Andrz., whereas 
other botanists believe them to be distinct and to represent two 
subspec 
Dr. Bos well Syme, in the third edition of English Botany, seems 
to have ‘Yeoogiiised three forms or subspecies, though he corrects 
= naming in his Report of the Lo ak Bot. Exch. Club, gare 
n Journ. Bot. 1869, p. 187. The third subspecies alluded t 
R. Friesianus Jord. Engl. Bot. ed. iii. vol. i. p. 89, the first tivo 
being R. Bor@anus Jord. and R. Steveni Andrz. Messrs. Rouy an 
Foucaud, i in their Flore de France now in course of publication, ‘is 
recognise the same three subspecies, and their arrangement of these 
an 
Under 7 aii meas diy Bore a@anus, Messrs. Rouy and Foucaud 
describe four — viz.:—(1) R. B reanus Jord. (pro specie), een 
one 
v: 
specie), shy one subvar., pumilus’: ; (3) R. stipatus Jord. (pro pune): : 
and (4) R. puscatintug Tord: (pro specie). 
* A clerical error in that paper ~_* here be noticed and corrected: line 18 
from the or for ‘ liangah ” read “ Fries 
