Puccinia Prostii, Moug., and Uromyces 
Scillarum, Wint. 
Two Rust Fungi from the Royal Botanic Garden, Edinburgh. 
BY 
MALCOLM WILSON, D.Sc., F.L.S., 
Lecturer in Mycology, University of Edinburgh. 
With Plates CXLII-CXLIII. 
Puccinia Prostii, Moug. 
Puccima Prostii, Moug., has been recently recorded in 
Britain by Massee* on cultivated tulips, but no particular 
locality is given. Saccardo } states that it occurs on Tulipa 
sylvesivis, Linn., and on T. australis, Link (T. Celsiana, DC.) 
in Italy and France. 
This rust was recently found in the Royal Botanic Garden 
attacking a bed of Tulipa sylvestris and doing considerable 
damage to the plants which produced few flowers. The rust 
was present on the plants in 1913, and_-probably also in the 
previous years. 
The sori, which occur on both surfaces of the leaf, are usually 
confined to one longitudinal half of the lamina (see PI. 
cxlii), frequently on that portion directed towards the north. 
There is no discoloration of the leaf around the sori. In addition 
to teleutospores, spermogonia are abundantly produced on the 
leaves, although in the descriptions of the fungus given by 
Saccardo,t Sydow,{ and Massee,* there is no mention of these. 
Two kinds of markings are obvious on the leaves :— 
(1) Yellowish-brown areas, elliptical or circular in shape, in 
which the epidermis is apparently unbroken (a, PI. cxliii, Fig. 1). 
(2) Grey or slate-coloured, usually spindle-shaped, areas, 
many of which show a longitudinal slit from which the brownish- 
black masses of teleutospores are projecting (0, Pl. cxliii, Fig. r). 
It appears that the spermogonia are first produced and give 
rise to the yellowish-brown spots, and that later on teleutospores 
are formed on the same sorus. In the early stages of develop- 
G. Massee, assisted by I. Massee, Mildews, potiiy and Smuts (1913), p. 139. 
: Saccardo, Sylloge Fungorum, vii (1888), p 
t Sydow, P. et H., Monographia ca ag i esa 
(Notes, R.B.G., Edin., No. XXXVIII, Sept. 1914.] 
