20 CRUCIFERA. [Arabis. 
particulars from the Irish plant: this alpine plant is now 
known as A. arcuata Shuttleworth. The various notes which 
have appeared concerning A. ciliata in the Annual Reports 
of the Botanical Exchange Clubs, &c., while they afford 
interesting, if bewildering, reading, are too long for insertion 
here. A paper, however, by M. Georges Rouy contributed 
to the Rev. de Bot. Systématique, of which a translation was 
communicated by Mr. Frederick Townsend to the Journ. 
of Bot., 1903, p. 278, may be referred to, as it gives the 
opinion of this well-known author on a gathering of A. 
ciliata made by the Rev. E. 8. Marshall and W. A. Shoolbred 
on the sandhills and sandy pastures about Castlegregory 
on the 24th June, 1902. In this paper M. Rouy draws up 
a new and lengthened description* of A. ciliata from the 
material sent him, a description which would include most 
of the Kerry sandhill plants, and he finally infers that the 
real affinities of this plant are with A. hirsuta Scop. rather 
than with A. arcuata Shuttleworth, and that one might say 
it is a form of A. hirsuta Scop. (sensu stricto). As this is 
also the opinion of other competent botanists, and fully 
agrees with the present writer’s conviction after many years 
observation of this plant in the field, it has seemed better 
to treat A. ciliata in this flora as an extreme sea-side variety 
of A. hirsuta, connected with the type by intermediate 
forms to some of which the names Retziana (Beurl.) and 
curtisiliqua Rouy & Fouc. have been given by continental 
botanists, and hispida and A. hirsuta var. glabrata by Syme. 
It is worthy of note that, so far as at present known, A. 
ciliata R. Br. appears to be confined to the west coasts of 
Ireland and England, and if really entitled to full specific 
rank is one of the few species endemic in the British Isles. 
[A. stricta Huds. “On the islands of Lough-Lane ” 
(Dr. Smith) Hist. of Kerry, 1756, p. 374, No. 17. This 
plant does not occur in Ireland, and in the British Isles is 
confined to some limestone rocks near Bristol. Perhaps 
Sisymbrium Thalianum, not uncommon about Killarney, 
was meant. ] 
* Had a wider series of Kerry A. ciliata been submitted to M. Rouy, he 
would, probably, have modified his description of this plant in one or two 
particulars, amongst them his statement that the ripe raceme equals or 
exceeds the remaining portion of the stem, While this is usually the case 
plants of undoubted A. ciliata have been noted both at Castlegregory and 
elsewhere in which the ripe raceme was not only less than half, but even 
barely a third the total length of stem. i. 
