186 SALMON : SUPPLEMENTARY 
species on the first two hosts, and there are specimens in the Kew 
Herbarium labelled “4. communis leguminosarum. . Ad. Victa ten- 
uifolia. Professor C. Haussknecht, Iter orientale, 1868, Luristan,” 
which belong to &. ¢aurica. The fungus recorded by Feltgen 
(18) as “EZ. Marti” or Lathyrus niger proves, from specimens 
sent, to belong to the genus Microsphaera and is probably J. 
Béumleri P. Magn. That, recorded by the same author (/ ¢.), 
as “ E. pist’’ on Galium Aparine, proved, like all records based on 
the fungus on species of Galium, to belong to &. cichoracearum. q 
The host-plant given as Colutea arborescens by Sydow, in his 
Mycotheca Marchica, no. 980, was, as Magnus (47 *) has recently 
pointed out, wrongly determined and is really Caragana arbores- 
cens. Colutea arborescens must therefore be removed from the list 
of the host-plants of Z£. polygont. 
In 1870 de Bary (Beitr. Morph. Phys. Pilze, 1: 50) raised 
the “ Evysiphe Marti forma E.” of Léveillé, occurring on vari- 
ous umbelliferous plants (see Lév. Ann. sci. nat. III. 15: 166. 
1851) to specific rank under the name £. umbelliferarum, and gave 
as host-plants Angelica silvestris, Chaerophyllum hirsutum, Anth- 
viscus silvestris, Pastinaca sativa, Falcaria Rivini and Heracleum 
Sphondylium. De Bary stated that his species scarcely differed in 
perithecial characters from ‘“‘ &. communis,’ and remarked ‘“ Dage- 
gen ist sie ausgezeichnet durch die Form der Conidien, welche 
genau walzenformig, an beiden Enden flach, und mindestens (doch 
nicht immer) sehr langgestrecht sind. Bei den vorher genannten 
Arten allen haben die Conidien die (im Profil elliptische) Gestalt 
einer schmalen an den Enden abgerundeten Tonne.” In my 
monograph (p. 184) I remarked that this character could hardly 
be considered sufficient to separate “ &. umbelliferarum” as # 
species, and also doubted whether it were a constant and dis- 
tinctive feature of the Evysiphe on Umbelliferae. I have since 
studied in a living state some conidial forms of £. polygon, and 
have found that the shape of the conidium is extremely variable. 
On Sisymbrium Alliaria (Cruciferae) (pl. 9, f 7) the conidia are 
for the most part distinctly cylindrical in shape, and intermixed 
with them one finds quite commonly elliptical conidia. The size 
of the conidium varies greatly ; the cylindrical ones are usually — 
about 38 y» long (and about 15 » wide), but here and there 2 
