APPENDIX. 193 



Yar. a. Taraxaci, Grev. ; clusters small, scattered. — On leaves 

 of the Dandelion. June to July. 



Var. h. Fmianthis, Pers. ; spots circular or irregular, purplish ; 

 subiculuni incrassated.— On leaves of Hawkweed (tHeracmm 

 paliidosmii) . Summer. 



Var. c.^ Tussilagi?iis, Pers. ; clusters round, on a thickened base ; 

 peridia circinating.— On the under surface of leaves of Coltsfoot 

 and Butterbur. Common. Autumn. 



Var. d. Jacoh(B(B^ Grev. ; pustular, soon becoming agglomerated, 

 numerous, depressed ; peridia splitting into short, brittle, yellow- 

 ish-white teeth. — On leaves of Senecio Jacohma and SoficJms 

 arvensis. June to August. 



Var. e, Lapsani, Purt. ; spots purplish, irregular, con- 

 fluent, on both sides of the leaves; peridia amphigenous, in 

 iiTegular patches or scattered, not prominent, teeth numerous, 

 minute, reflexed; spores yellow, oval. — On both surfaces of 

 the leaves of Lapsana communis. April. Not uncommon. 



.fficidium Saniculse, Carm. Sanicle Clusteti-Cups ; 

 spots_ purplish, slightly incrassated, small, scattered, roundish; 

 peridia in small circinate^ clusters, hypogenous, and _ on the 

 petioles, at first hemispherical, at length open, margin with from 

 4 to 6 spreading lobes; spores yellowish, elliptical. — On the 

 under surface of the leaves and on the petioles of Sa?iicula 

 Europ^a. Not uncommon. May and June. 



-Scidium Violse, Schum. Violet Clustee-Cups ; spots 

 yellowish ; peridia in irregular heaps, seriate ^ and scattered ; 

 spores orange, at length brown. — On leaves, petioles, and sepals 

 of Violets. Common. May and June. 



^cidiuni Poterii, Cooke. Burnet Clusteh-Cups : spots 

 obliterated, clusters subrotund or elongated ; peridia hypogenous 

 and on the petioles, circinating or scattered, immersed, margin 

 irregularly fringed with numerous minute teeth, soon falling 

 away; spores yellowish, oval. — On the under surface of the 

 leaflets and on the petioles of Foterium Sangidsorba, Hare. May 

 and June. Dartford Brent, Kent. 



jSJcidium Geranii, DC. Cranesbill Clust-er-Cups ; 

 spots yellow and purple ; peridia in circinating clusters ; spores 

 yellow, at length brown. — On the under surface of leaves of 

 Geranium prat ease and G. dissectmi. Not common. 



^cidium Mentha, DC. Mint Cluster-Cups; spots 

 obliterated; subiculum thickened ; peridia scattered, emersed, or 

 aggregate immersed ; spores orange, elliptic. — On various Mints. 

 Common. 



JEeidium Seropliularisa, DC. Pigwort Cluster-Cups ; 

 spots yellowish; peridia in roundish circinate clusters (rarely 

 scattered) on the under surface ; spores whitish, becoming tawny. 



