ON UMBELLIFERA 185 
the petioles sometimes very large, scattered or confluent, 
roundish, pulverulent, blackish-brown; spores ellipsoid to ob- 
long, rounded above, not thickened, hardly constricted, rounded 
or gently attenuated below, smooth, brown, 30—50 x 15—23 p; 
pedicels hyaline, thin, deciduous, about as long as the spore. 
On Apium graveolens. Not common. Aicidia in May and 
June; teleutospores September—November. Distinguished 
from many of its close allies by the possession of an ecidium. 
(Fig. 132.) 
DistRisution: Central and Northern Europe, East Indies, 
Japan, Tasmania. 
57. Puccinia ASgopodii Mart. 
Uredo Aigopodii Schum. Plant. Sal. ii, 233. 
Puccinia Aigopodii Mart. Fl. Mosquen. p. 226. Cooke, Handb. p. 502; 
Micr. Fung. p. 208. Plowr. Ured. p. 201. Sacc. Syll. vii. 678 p.p. 
Sydow, Monogr. i. 353. Fischer, Ured. Schweiz, p. 105, f. 79. 
Teleutospores. Sori amphigenous, but chiefly on the petioles 
and nerves, on thickened yellowish spots, 
small, but collected into dense irregular 
clusters and confluent, at first black, { 
covered by the shining epidermis which 
splits in places longitudinally, soon naked, 
pulverulent, blackish-brown; spores ob- 
long to ovoid, often irregularly angled and 
oblique, usually rounded above and with 
a pale wart-like apiculus 2—3 yw high, 
hardly or not at all constricted (often broadest at the septum), 
more or less rounded below, smooth, clear chocolate-brown, 
granular, 28—48 x 15—22 w; pedicels hyaline, short, deciduous. 
Fig. 133. P. A gopodii. 
Teleutospores. 
On Aigopodium Podagraria. April—August. Rather com- 
mon. (Fig. 133.) 
According to Tranzschel, a few isolated uredospores are to be found 
in the young sori; they are almost colourless, aculeate, 20—22 x18 p. 
Semadeni proved that the spores of this fungus would infect only 
Afgopodium, and not any of the allied Umbellifers. In this species, 
