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206 MICROSCOPIC FUNGI.
Lecythea, LSd.
stroma surrounded or sprinkled with elongated abortive spores.
Spores free, invested with their mother-cell, or concatenate.—
Berk. Outl., p. 334.
* Spores free.
Lecythea Ruborum, Lev. Bkamble Eust. Spots pale,
brown or purple on the opposite side, sometimes depressed
above ; sori subrotund, aggregate ; epidermis soon bursting ;
spores globose or subglobose, echinulate, bright ochraceousyellow.
— On the under surface of Bramble-leaves. July and
August. Very common. (Plate III. fig. 40.)
Lecjrthea Rosse, Lev, Rose Rust ; spots yellow, small,
scattered ; spores sub-oval, sometimes minutely pedicellate,
orange. — On Rose-leaves. Julv, September. Extremely common.
(Plate III. fig. 37.)
Lecythea Poterii, Lev. Burnet Rust ; spots obliterated,
rufous on the opposite side ;
sori subrotund, scattered, minute on
the under surface ; epidermis bursting ; spores subglobose, often
pedicellate, intense orange ;
barren spores pale, cylindrical, and
—
sHghtly curved. Ovi Foterium Sanguisorba. Summer. Common.
(Plate III. fig. 31.)
Lecythea Populina, Lev. Poplab, Rust; hypogenous;
sori yellow, roundish or oblong, surrounded by the ruptured
epidermis; spores copious, elongated or ovate.— On Poplar and
Birch leaves. Summer. Common.
Lecythea Euphorbiae, Lev. Spurge Rust ; spots obliterated
;
sori subrotund, small, scattered, surrounded by the
ruptured epidermis; barren spores pyriform or subglobose, pedicellate
;
fertile spores subglobose, orange. — On the under surface
of the leaves of various species of Euphorbia, especially E.
Iielioscopia and E. peplus. August. Very common.
Lecythea epitea, Lev. Tawijy Willow Rust; sori
roundisn, scattered, at first tawny, at length growing pale, surrounded
by the ruptured epidermis ; spores subrotund and pyriform.—
On the under surface of Willow-leaves.
Lecythea mixta, Lev. Orange Willow Rust; spots
yellow ;
sori subrotund, aggregate, cotifluent, effuse, permanently
surrounded by the raptured epiderm.is • spores oblong and pyriform,
orange.—On both surfaces of the leaves of Willows.