120 
C. H. Ostenfeld . 
Sorbus aucuparia L. var .flava Druce, New Phyt., 1911, p. 312. 
The form with orange-yellow (“ aurantiacus ”) fruits seems not 
to have been described before, as it is different from 5. aucuparia 
var. Fifeana hort. (cf. Ascherson and Graebner, Snyopsis VI, 2, 
1906, p. 88), which is a yellow-fruited form of the hairy variety 
(var. lanuginosa (Kit.) of the mountain ash. The Irish yellow- 
fruited form belongs to the var. typica of the species. I only 
saw one tree at Roundstone (Galway), and two trees, far distant 
from each other, in the wood at the Upper Lake, Kiilarney. 
DlPSACACE/E. 
Succissa prcemorsa (Gil.) Aschers., var. hispidnla Petermann, FI. 
Lips, excursor., 1838, p. 119 (cf. Dorfler, Herb, normale, No. 4537). 
The strongly hairy specimens of Succisa growing in the grass- 
sward on the coastal cliffs of the Lizard peninsula (Kynance Cove, 
etc.) may be referred to the above variety. 
Composite. 
Erigeron borealis (Vierhapper) Simmons. Syn. E. alpinus auct. 
brit.; Triiuorpha borealis Vierhapper, Beih. Botan. Centralbl., 19, 
2. Abt. 1906, p. 447. 
According to Vierhapper’s monograph of the alpine species of 
Erigeron the Scottish and northern plant usually named E. alpinus 
is not the true alpine species, but another separate species. It 
differs from E. alpinus in the ohtuse basal leaves, the rather 
sparingly hairy base of the stem and the strongly hairy, often purple 
phyllaries. 
Sonchus oleraceus L. var. albescens Neuman (Sundsvalls Almanna 
Laroverks aarsredogorelse, 1889). cf. Neuman, Sveriges Flora, 
1901, p. 57, and Ostenfeld, in Botan. Tidsskrift, vol. 29, 1909, p. 328. 
In 1889 L. M. Neuman pointed out that besides the yellow- 
flowered typical S. oleraceus a form with paler flower occurred in 
Denmark. I myself have seen this form in many places in Denmark 
and also elsewhere, and during the excursion I found it in Ireland, 
at Galway City, where the typical form was also present (the latter 
was noticed again at Cork). I think the variety will be found to 
occur over the whole of the British Isles. 
In Denmark I have cultivated the pale-flowered form and found 
that it keeps quite constant. The corollas are really white with a 
grey-lilac stripe on the underside, but as the pollen is orange-yellow, 
it gives a pale-yellow tint to the whole capitulum, and a closer 
examination is necessary to discover how the matter really stands. 
Ericaceae. 
Erica Mackayi Hook, x tetralix L ,=E. Praegeri nov. hybr. 
Much has been written about the peculiar E. Mackayi Hook, 
and it has been considered a hybrid, but I think that Macfarlane 
(Trans. Bot. Soc., Edinburgh, Vol. XIX, 1891, p. 58-64) has fully 
shown that it is a separate form derived from E. tetralix, of which 
he makes it a sub-species. I think I have found another argument 
which supports the idea of E. Mackayi being a true species and not 
a hybrid—undoubtedly very near to E. tetralix and perhaps to be 
considered as a mutant of it. This argument is the existence of 
