196 MICEOSCOPIC nJNGI. 



^cidiiim crassum, Pers. Btjckthobn Cluster-Cups ; 

 spots yellow-brown, subiculum thickened ; peiidia crowded into a 

 roundish heap, at first globose, yellow, at length open ; spores 

 orange. — On Rhamnus catharticus and R. frangula. Common. 

 Said to be a condition of Pucdnia coronata. 



.Slcidium Periclymeni, DC. Honexsuckle Cluster- 

 Cups ; spots variegated, yellow and brown, subiculum thickened ; 

 peridia sometimes elongated, in roundish or effused heaps; spores 

 orange. — On the under surface of Honeysuckle leaves. Not 

 common. June to August. Possibly only a variety of the last. 



/3. Poculiformis. 



^cidium Calthse, Grev. Marsh-Marigold Clustee- 

 Cups; aggregate; peridia somewhat campanulate, with numerous 

 minute marginal teeth ; spores bright orange, sublogose or oval. 

 — On leaves and petioles of Calthapalustris. Margin of peridia 

 pale and brittle. Rare. Spring, baid to be a state of Pucdnia 

 Calthie. 



.SJcidium Banunciilacearuin, DC. Ceowpoot Cluster- 

 Cups; spots obliterated, subiculum thickened ; peridia in irregu- 

 lar heaps, densely crowded together ; spores orange. — On leaves 

 of various Ranunculacete ; very common on R. Picaria, not un- 

 common on R. repens, more rarely on R. acris and R. htlbosus. 

 Spring. Said to oe a condition of Uromyces Picarim. (Plate II. 

 figs. 12-14.) 



.Sicidium Galii, Pers. Bbdstraw Clusteb-Cups ; spots 

 linear or oblong, obscurely brown; peridia scattered, rarely aggre- 

 gate, dentate, whitish ; spores white. — On the leaves of Galium 

 vernm and G. mollugo. Said to be a state of Pucdnia Galiorum 

 (Plate II. figs. 15-17.) 



.^cidium Bunii, DC. Pig-nut Cluster-Cups; spots 

 obliterated, subiculum thickened ; peridia in irregular subrotand 

 or oval heaps; spores orange. — On Bunium bulbocasianum. Spring. 

 Said to be a state of Pucdnia bulbocastani. 



.Sicidium PimpineUse, Kirch. Pimpinella Clustbe- 

 Cups ; spots obliterated ; peridia in irregular clusters, cup-shaped ; 

 spores yellowish-browu. — On leaves of Pimpinella Saxifraga. Said 

 to be a condition of Pucdnia Pimpinella. 



.Slcidium Valerianacea;nim, Dub. Valeeian Clustee- 

 Cups ; lypogenous, rarely cauline, spots on a thickened subcir- 

 cular c oblong base ; peridia scattered, more or less crowded, 

 cup- sh:,ped, tawny, margin erect, denticulate; spores dirty-yellow. 



