284 KFPOKT OF THE BOTANICAL EXCnAXGE CLDB, 



trianpulur ]toi)it, woukl express tlio British R. maximus. Tlie 

 5;rauule is cousidfrably larger in proportion to the size of the petal in 

 the British than in the foreign phint, wliih; the wliole aspeet of the 

 foreign phmt suggests a deviation from R. Hydrohpatham in the 

 direction of it Uipijolapaihim, Fries {aquaticus, Koch at Auct. plur. 

 non Bab). The British plant, on the otiier hand, gives me the idea of 

 a deviation from R. llydrolapailium in the direction of R. pratcnsis or 

 obtimfolius. Can it be that R maxiinus is a series of hybrids between 

 7l. lIijdrola2)(tthmi and other llumices, or is it a mere variety of R. 

 Ui/droliipafJium f My attempts to raise this Dock, from the seed of 

 dried Continental specimens have failed to furnish me with seedlings, 

 and it "Was not until tliis spring that I succeeded in raising 

 them from the seeds of the Lewes plant ; but this gives me some 

 hopes that I may yet be able to judge from growing plants. — J. T. 



BosWELL. 



Salix rubra. " Bllbrook, Staffordshire, 17th April and 25th July, 

 1874." — Dr. JoHX FiiAsiCR. This is not S. rubra, Huds. — i.e., a 

 plant probably hybrid between S. purpurea and S. viminalis. It is 

 S. Treverani, Spr., one of the forms included by Wimmer under his 

 S. triandra-v iminalis. — J. T. Boswell. 



Salix Smithiana, Willd. " Kear Ednam, Eoxburgh, April and 

 August, 1875." — E.. BiioTHERSTON'. The satiny-white pubescence 

 makes me think that this is rightly named, but the catkins look more 

 like the comparatively small ones of 8. rurjom, but this may arise 

 from having been gathered before attaining their full size. S. Smith- 

 iana is readily distinguished from S. rwjosa when growing, but is 

 much more difficult to determine from dried specimens. S. Smithiana 

 differs from S. rugosa in the leaves (which should be taken from the 

 autumnal barren shoots of an xmmutilated tree) being usually larger, 

 less attenuated at the base, lighter green and smoother and more even 

 above, whiter and more silky beneath. Also by the catkins being 

 considerably larger and with larger and longer- haired scales. — J. T. 

 Boswell. 



Zannichellia forms. Mr. Baker has drawn up the following 

 description of the varieties or subspecies known to be British, and 

 Dr. Boswell has made valuable notes on two or three. — T. R. A. B. 



Zannichellia palustris, L. The varieties or subspecies of 

 Zannichellia represented in our flora appear to be four in number, 

 viz. : — 



1. Z. hrachystemon, Gay, Carpels 2-4 to a flower. Shortly 

 pedicellate. Pedicel usually about a quarter as long as the fruit, 

 which is three-quarters to one line long, and crenate on the back. 

 Style about half as long as the fruit. Stigma large, crenulate. Fila- 

 ment one-eighth to quarter inch long. Anther two-celled. This is 

 the common inland form throughout the country. Here belong Z. 

 palustris, Eng. Bot., edit, iii., t, 95, and of the " Herbarium Normale " 

 of Fries, Z. repens of Borcau, and Z. dentata of Lloyd. Z. repcns, 

 Bonning., as figured, Eeich., Ic. Fl. Germ., tab. 16, fig. 20, is a sub- 

 ordinate form with slender habit, pedicel none, a small carpel, and a 

 very large stigma. Z. major, Bonug., Reich. Ic, vii., t. 16, fig. 24, 

 a form of stouter habit with larger fruit crenulate on the back. 



2. Z. pedunmlata,'^Qic\i.lc., vii., t. 16, fig. 21. Pedicel from 



