134 PUCCINIA 
6. Puccinia Absinthii DC. 
Trichobasis Artemisiae Berk. ; Cooke, Micr. Fung. p. 223. 
Puceinia Discoidearum Link ; Cooke, Micr. Fung. p. 206. 
P. Tanaceti Plowr. Ured. p. 189 p.p. Sace. Syll. vii. 637 p.p. 
P. Absinthis DC. Flor. fr. vi. 56. Sydow, Monogr. i. 11. Fischer, 
Ured. Schweiz, p. 188, f. 148. 
Uredospores. Sori generally hypophyllous, on yellowish- 
brown or indeterminate spots, scattered or aggregated, not 
confluent, minute, roundish, pulverulent, pale-brown; spores 
globose to ovoid, echinulate, pale yellowish-brown, 20—35 x 
15—26 pw, mostly with three subequatorial germ-pores. 
Teleutospores. Sori amphigenous, but generally on the 
lower surface or sometimes on the 
stems, similar to the uredo-sori but 
occasionally confluent, soon naked, 
dark-brown or blackish; spores oblong 
to oblong-clavate, rounded and thick- 
ened (8—7 p) above, constricted, 
slightly attenuated below, the upper 
cell punctate or verruculose, the 
lower frequently smooth, especially 
at the base, brown, 38—62 x 20— 
27 w; pedicels hyaline, thick, persis- 
tent, as much as 80 w long. 
On Artemisia <Absinthium, A. 
Fig. 86. P. Absinthii, Teleu- maritima, A. vulgaris. July—Sep- 
tospores, on A. Absinthium. + ber, Rather uncommon, Also 
recorded in Switzerland on A. campestris. (Fig. 86.) 
The germ-pores of both kinds of spores are covered with paler, swollen 
caps. P. Tanaceti, which was formerly united with this species, possesses 
on the average narrower and shorter teleutospores, though in each these 
spores are said to be marked in a similar way, chiefly in the upper half. 
But the markings of P. Absinthii are stronger and less likely to escape 
observation, especially on the pore-caps of both cells. 
DISTRIBUTION: Europe, Siberia, Japan, North America 
