Rust, Smut, Mildew, & Mould: An Introduction to the Study of Microscopic Fungi

by M. C. Cooke

Uredo pustulata, P. Willow-herb Uredo; spots yellowish; sori subrotund, minute, closed, scattered and confluent on both surfaces; spores globose, yellow.—On Epilobium palustre.

Uredo Hypericorum, DC. St. John’s-Wort Uredo; spots yellowish; sori subrotund, small, bullate, distinct, scattered on the under surface; epidermis at length bursting; spores subglobose, cohering, orange.—On various Hyperica. August. Not uncommon. ([Plate VIII.] figs. 174, 175.)

Uredo Caryophyllacearum, Johnst. Stitchwort Uredo; spots yellowish; sori subglobose, scattered and aggregate, minute, generally on the under surface; epidermis closed; spores oval, at length yellow.—On various Caryophyllaceæ. Autumn.

Uredo Quercus, Brond. Oak-leaf Uredo; on the under surface; sori yellow, then orange, minute, ovate, and orbicular, slightly prominent, scattered, solitary or agglomerated into minute patches, surrounded by the ruptured epidermis; spores subglobose, pellucid, not cohering.—On Oak-leaves. September. Not common.

Uredo porphyrogenita, Kze. Bird-cherry Uredo; spots purplish; sori subrotund, small, aggregate, hypogenous; epidermis at length ruptured; spores coherent, subglobose.—On leaves of Prunus Padus. Scotland, 1863. (Rev. M. J. Berkeley.)

Uredo Vacciniorum, P. Bilberry Uredo; spots yellow-brown; sori subrotund, minute, aggregate, and scattered, on the under surface of the leaves; epidermis seldom ruptured; spores ovoid, yellowish.—On Vaccinium Myrtillus and V. vitis-idæa. Scotland.

Uredo confluens, DC. Mercury Uredo; on the under surface, depressed, yellow, oblong, concentric, at length confluent; spores nearly oval.—On Mercurialis perennis and M. annua. May, June. Common. ([Plate VII.] figs. 133, 134.)

Uredo Alliorum, DC. Garlic Uredo; spots obliterated; sori linear, oblong, and oval, on both surfaces; spores ovoid or subglobose, yellow or whitish.—On various species of Allium. Common.

* * Spores brown.

Uredo Statices, Desm. Sea-lavender Uredo; sori few and scattered, orbicular or oval; spores sessile, globose, brown.—On various species of Statice.