ARTICLE 45 oF THE VIENNA CODE 359 
national Congress can again be brought together, it peck be well 
to add a rider to Article 45 (thus making its meaning unambi das 
to the effect that the log spe applies to future divisions 
genera or groups, and o retrospective action; and that, as 
with the definition of coe, so too with genera, the rule of 
priority shall be enforced. At present Article 45, at any rate in 
the English version, has led to some misunderstanding, and may 
lead to unneccessary disturbances in nomenclature. 
DIALYSIS OF COROLLA IN CONVOLVULUS ARVENSIS. 
By G. 8. Bouncer, F.L.S. 
In September Mr. G. D. Willis, of Basingstoke, Hants, sent 
me a specimen of Convolvulus arvensis L. from that neighbour- 
hood, in which the corolla is deeply five- cleft. The plant is on 
the whole smaller in its parts than the typical form; its leaves 
oblong, subacute, and slightly hastate; and the corolla white. 
Mr. Willis writes that this form occurs along some twenty to 
ge -five yards of hedgerow, where he has oe nown it for at 
st five years, and where it has had this year to withstand the 
omtnin of a military camp. As the Be is perennial, this 
oes not prove that this form is true to 
n endeavouring to trace previous eevee of such a variation, 
the earliest me A ae bags that in Dilleni ius’s se pi of 
Synopsis (p. 276), where we Sate onvolvu ene is 
ad yaaa ba secto. Prope dstone inv tD. R an 
fue ecord i noted a Smith (Hnglish Florey j i. 285) with- 
any ee t that he had himself found such a 
Ne Ba Tans Hopkirk, in his Flora Anomoia (1817), 
p. 186, writes: “ The natural divisions of the corolla are in some 
instances increased in depth, asin . . . the variety of the Small 
Bindweed (Convolvulus arvensis) mentioned by Ray, and since 
ound by Sir Edward Smith, the corolla is deeply divided into 
George En ngelmann, in his De Antholysi Prodromus (1832), 
pp. ey says, under the heading “ Disjunctio petalorum gamo- 
merium”: ‘Hee antholysis forma frequenter occurrit ; 
naar Sel in Anagallide virescente; in Orobanche Schimper 
animadvertit. Nominan tur ab auctoribus Solanum tuberosum, 
Convolvulus arvensis He refers a A age tansy men- 
tions four or pe me plants varying in a similar ma 
In a Font, Baron de ieltossa: published « Notes 
re la vogétati Se a environs de Laon... ur quelques 
arietés ou monstruosités observées dans cette sone eé nales 
vrs Sciences Naturelles, 2nd ser. vol. ix. (Botanique) p. 380). He 
writes: “ Convolvulus arvensis L. y. 8 corollis atonal quinque- 
pothecary in the Haymarket, became in the year 
Dilleniue'e 's Sek om pabeiebied (1734) ‘ Prefectus ’’ at ‘he Chelsea pie: : 
