HIERACIUM PRECOX, NOVA FLORÆ BRITANNICH PLANTA. 228 
reproduction in a diagrammatic way, and Hegelmaier gives drawings 
of the flowers (loc. cit. tab. 29). There is also a highly-coloured re- 
presentation in Reichenbach's Icones Fl. Germ. vol. vii. tab. 14. 
In no figure that I have seen is the oblique way in which the new 
frond springs from its parent well shown, nor does any express clearly 
the peculiar sort of convexity of the upper surface of the frond. The 
convexity is from side to side, the upper surface seeming, as it were, 
to overlap the sides of the frond, so that it is only by the want of 
stomata and the lighter colour that it can be seen where the upper 
surface ceases. From end to end in the long diameter the frond is 
nearly flat, and there is a well-defined edge at either extremity.' 
It is scarcely necessary to allude to the idea once prevalent amongst 
botanists that W. arrhiza is merely a young or abortive state of some 
Lemna, nor to the recent proposal of M. Franchet, to include the 
plant among the seaweeds. 
I will conclude this notice with a list of the species of Wolffia at 
present known :— 
I, arrhiza, Wimmer, including W. Delilii, Schleid., and JF. 
Schleideni, Miguel. 
W. Brasiliensis, Weddell, loc. cit.. 
W. microscopica, Kurz. (Grantia, Griff. Not. ot p. 226.) 
. JF. Conguensis, Welwitsch, m 
W. repanda, Hegelmaier, loc. a 
W. Welwitschii, Hegelmaier, loc. cit. 
^ s ww 
HIERACIUM PRZ4ECOX, NOVA FLORA BRITANNICA 
PLANTA. 
Auctore C. H. SCHULTZ-BIPONTINO. 
Hieracium precoz, C. H. Schultz-Bip. in Pollichia x. anno 1851.— 
Hieracii murorum, Linn., nomine in Musei Britannici herbario die xxvi 
m. Maji Hieracii precocis specimina examinavi in Britannia (1) Great 
Orme's Head et (2) Castell Dinas Bran, Denbigh, N. Wales, a cl. J. E. 
Bowman lecta. 
Planta Britannica a nostra in Palatinatu ad Rhenum, in sylvaticis supra 
vineas prope Deidesheim crescente, non differt, et prima dignoscitur a 
