io8 
MILDEWS, RUSTS AND SMUTS 
on both surfaces of the leaf ; spores elliptical or oblong, 
tip rounded, thickened, base generally rounded, minutely 
warted, especially towards the tip, brown, 32—44 X 16— 
24 [JL, pedicel thick, long, persistent. 
On Tanacetum vulgare. Britain, Europe generally. 
Plowright included Puccinia artemiseae, in the present 
species. 
TARAXACUM 
Puccinia variabilis, Grev.; Plowr., Brit. Ured., p. 150. 
' Aecidia. On minute yellowish or purplish spots, scat¬ 
tered over the under surface of the leaf, less frequently 
on the upper side, solitary or in small groups, cup¬ 
shaped with white torn edges ; spores orange, minutely 
warted, 20—25 X 15-—20 p. 
Uredospores. Sori small, rounded or elongated, scattered, 
minute, soon naked, brown, on minute purplish spots on 
both sides of the leaf; spores subglobose or ovate, echinu- 
late, brown, 20—35 x 15—25 p,. 
Teleutospores. Sori similar to those of the uredospores, 
dark brown; spores, oval, oblong or subglobose, tip rounded, 
not thickened, scarcely constricted at the septum, very 
minutely warted, brown, 25—50 x 20—28 p., pedicel as 
long as the spore, but deciduous. Both forms of spore 
often met with in the same sorus. 
S}^. Aecidium taraxici, Grev. 
■ ' Aecidium grevillei, Grove. 
■ 'On Taraxacum officinale. Britain, Sweden. 
Puccinia taraxici, Plowr., Ured., p. 186. 
Pycnidia. On yellow, oval or circular spots. 
Uredospores. Primary, sori few, large, dark brown, 
elongated or in rings ; spores ovate, globose or pear-shaped, 
echinulate, brown, 25—30 X 25 p,. Secondary; sori 
very small, numerous, round, often confluent, soon powdery, 
'brown, echinulate, 20—25 [ji diam., with two germ-pores. 
Teleuto spores. Sori minute, circular, powdery, sur¬ 
rounded by the torn epidermis, blackish, on both sides of the 
leaf; spores shortly oval or subglobose, tip rounded, not 
thickened, scarcely constricted at the septum, brown, ec¬ 
hinulate, especially above, epispore thin, 25—^40 x 16—25 
p., pedicel short. 
- Syn.' Puccinia phaseoli, var. taraxici, Rebent. 
•On Taraxacum officinale. Britain, Europe generally, 
N. America, India, Japan. 
This is a much more common species than Puccinia 
variabilis. 
