EXCHANGE CLUB REPORTS 865 
their native soil, but in a mixture of Surrey soils. These plants 
green ; so that t 
this jaeiaty from the type is merely temporary and due to habitat. 
he serpentine gravels of Unst contain a number of minerals, 
notably chromate of iron, ~~ “ colour of the leaves may probably 
be due to the influence of one of them. The Cerastium is by no 
means the only one growing ¢ on these hills which is affected in this 
way. J. M. Norman’s ‘C. latifolium’ is, of course, C. arcticum 
(Cc. latifolium proper a being known in Scandinavia or other boreal 
Pam apie his reference of C. arcticum to a hybrid C. 
alpinum X C. latifolium is mythical.—W. H. B.” 
m isha Andrewsii Harvey. Hort. Prestwich, July and 
August, 1898.—J. C. Merv. This, reported to have been 
originally found on a mountain to the south of Glen Caragh, Co. 
Kerry, by the late Mr. Andrews, has never been rediscovered in a 
wild state. I received many years ago a specimen labelled as 
as been a descendant of the original Kerry plant, and have 
own it since 1875. It increases rapidly by throwing out fresh 
tise annually, but, though it apparently ripens its seed, I have 
yet to prove that it is fertile. It is supposed by some authors to be 
a hybrid between S. wnbrosa L. and S. Aizoon L. The latter, how- 
ever, does not grow wild in this country. Itis the S. Guthrieana 
Engler (Verh.-Zool. Bot. Ges. Wien. 1869, 587).—J. C. M.” 
** Orobanche amethystea Thuill.? On leguminous plants near 
Dursley, W. Glou ucestershire, 13th July, 1898.—J. W. Wat 
some measure these specimens resemble O. amethystea rather than 
O. minor, but I am unable to name them positively. Does amethystea 
ever grow inland upon ’rifolia?.—J. W. W. it 
sent me this, or a similar plant, ina fresh state, and that I led him 
the pale bluish purple with which it is suffused is bd Death, and 
contrasts greatly with the whitish yellow of 0. Ptcr Whe 
growing on Ononis and on Daucus, side by side, 0. Rika does 
not Nae practically different ; but in one place near St. Margaret 
Kent, I find a very small-flowered form on Daucus (O. Carote 
Desm. ?). It has been said that the differences in Orobunche may 
be produced by the host plants, but I have failed to see any differ- 
ence in eu-minor on Trifolium, and on Crepis virens, plants of very 
different natural orders; and I have traced on the same day 0. caryo- 
phyllaceaon Galiumverum, G.elatum, and Lotus oe a 
them, and found no appreciable difference. ARTHUR 
. ‘Stachys alpina L. Open woodland and hedge- as ke liven 
North Nibley and Wotton-under-Edge, W. Gloucestershire, 8th 
July, 1898.—J. W. Warre. Discovered by Mr. Cedric Bucknall 
(see Journ. Bot. xxxv. 880). This summer a special search, under- 
taken by three of us, has extended the known area of the plant to 
about two square miles, and has shown that it occurs in great 
