A CONTRIBUTION TO THE FLORA OF THE COUNTY
289
*P. taraxaci Plow.
U. and T. On Taraxacum officinale, Maldon (H.) ; Coggeshall
(T.) ; Broomfield (C.).
P. polygoni Pers. (P. amphibii Fckl., P. polygonorum, Link.).
U. (Uredo polygonorum, D.C.). On Polygonum amphibium,
Beeleigh (H.) ; on P. convolvulus, Woodham Walter
(H.); Chelmsford and Broomfield (C.) ; on P. lapathi
folium, Braxted, Broomfield and Springfield (C.); on
†P. sieboldii, Witham (T.) ; on †P, Persicaria, Maldon
(H.).
T. Same localities and hosts.
P. tanaceti D.C. (P. discoidearum, Link.).
U. and T. On Tanacetum vulgare, Maldon (H.) ; on Artemisia
vulgaris, Maldon (H.).
P. pruni Pers. (P. prunorum, Link.).
U. and T. On Prunus domestica, Maldon (H.) ; Witham (T.).
*P. anthoxanthi, Fckl.
U. On Anthoxanthum odoratum, Widford (C.).
P. lychnidearum, Link,
U. and T. On Lychnis diurna, Maldon (H.) ; Kelvedon (T.) ;
Hazeleigh and Linguard Common (C.).
*Puccinia acetosae Schum.—I am not aware that this is
anywhere, except in a MS. list in my possession, referred to as
British. I therefore append a description :—
Sori scattered, on the leaves small, irregularly rounded, on the stems and
petioles oblong, not long covered by the epidermis. Uredospores globose, elliptic
or pyriform, 24-30 x 20-25 u., brown, echinulate. Teleutospores oblong or
subclavate, constricted in the middle, apex rounded, 30-45 x 20-25 u.,
subverrucose, chestnut-brown, pedicels hyaline, long, slender, deciduous.
On Rumex acetosa and R. acetosella.
Occurring in Germany, Switzerland, and Italy,
[See Korn in Hedwigia 1876, p.184 ; Winter Die Pilze, p. 187 ; Schroet. Pilz.
Schles, p. 339 ; Sacc. Sylloge, Vol. vii., p. 638 ; Syn. Uredo acetosae,
Schum. (Saell. II. p. 231) ; Puccina rumicis Lasch. (in Rabenh. Fungi Europ.
p. 496).]
Mr. Heaver found a rust fungus on R. acetosella at Maldon,
and Dr. Plowright, to whom I am indebted for references to the
original descriptions of the fungus which I have consulted,
referred it to this species.
P. tragopogi Pers.
AE. (AEcidium tragopogonis Pers.). On Tragopogon pratensis,
Maldon (H.) ; Boreham (C.) ; nr. Broxbourne (W.).