190 PUCCINIA 
ecidium-stage appears in May and June, often abundantly. This applies 
especially to the parasite on Bupleurum falcatum, which is probably 
identical with that on B. tenuissimum, but the Walton plants bore flowers. 
Distripution: Europe, Asia Minor, East Indies, Yunnan. 
62. Puccinia ASthuse Mart. 
Uredo Petroselini DC. Flor. fr. ii. 597. 
Trichobasis Petroselini Berk. ; Cooke, Micr. Fung. p. 223 (?). 
T. Cynapit DC. ; Cooke, Micr. Fung. p. 224. 
Puccinia Afthusae Mart. Flor. Mosq. ed. ii. p. 225 (1817). Cooke, 
Micr. Fung. p. 209. 
P. bullata Wint. ; Plowr. Ured. p. 185 p.p. 
P. Petroselint Lindr. Faun. et Flor. Fenn. xxii., no. 1, p. 84 (1902). 
Sydow, Monogr. i. 399, 889. Fischer, Ured. Schweiz, p. 112, 
f. 86, 
Spermogones. Hypophyllous, yellow-brown, or almost hya- 
line. 
Uredospores. Sori generally hypophyllous, scattered or in 
small clusters, very small, occasionally confluent and larger, 
pulverulent, cinnamon; spores globose to ellipsoid, echinulate 
either all over or only in the upper part, thickened above 
(5—6 p), yellowish or brownish-yellow, 22—29 x 21—25 p, with 
three (rarely two) equatorial germ-pores with conspicuous caps. 
Teleutospores. Sori similar, but dark-brown, on the petioles 
and stems often larger, confluent and 
elongated; spores ellipsoid or ovate, 
rounded at both ends or slightly at- 
tenuated below, not thickened above, 
hardly constricted, smooth or nearly 
so, brown, 28—48 x 18—25 pu ; pedicels 
hyaline, thin, short, deciduous. 
Fig. 188, P. Athusae. On Athusa Cynapium, Petroselinum 
Teleutospore anduredospore, ¢,4,° 
iG hia. sativum. Not common. June—Oc- 
tober. (Fig. 138.) 
It is possible that the forms on these two hosts are distinct species, or 
at least biological races. Semadeni showed (Centralbl. f. Bakter, 2. xiii. 
443) that, while he could infect several (non-British) species of Umbelliferee 
with uredospores from Hithusa Cynapium, he could not infect Petroselinum 
sativum ; at the same time he could find no morphological difference 
