298 PROCEEDINGS OF THE 



Juniper (Podisoma Sabince). The curious little horns (Roestelia 

 cornuta) on the leaves of the rowan-tree produce spores from which 

 on the common juniper proceed the gelatinous orange fungus known 

 as Gymnosporangium Juniperi. In the same way a cluster-cup on 

 the nettle is associated with a puccinia that appears on various 

 carices, while cluster-cups on Ecliium vulgare, Rhamnus Frangula, 

 Orchis maculata, Tussilago Farfara, and many other plants, in a 

 further stage become puccinia on various grasses. 



These discoveries of the identity of species formerly considered 

 distinct have led some continental botanists, Winter and Schroter 

 especially, to attempt a classification of the Uredines more in 

 harmony with the facts ascertained. 



Note. — This classification in a modified form is given by Dr. Plowright in 

 " Grevillea " for March, 1883, to which I beg to refer you. The following is 

 (in an abridged form) the arrangement of 



Uromyces and Puccinia. 



1. Leptnromyces. 1. Leptopuccinia- j ^ronce 01 ' 8 "**' germinating 



2. Micruromyces. 2. Micropnccinia- j Teleutospores only, germinating 



J l ( alter a period oi rest. 



3. Hemiuromyces. 3. Hemipuccinia — Uredo and teleutospores. 



4. Uromycopsis. 4. Pucciniopsis — ^Ecidio and teleutospores. 



5. Eu-uromyces. 5. Eupuccinia — iEcidio, uredo and teleutospores. 



(a) All three spore forms on same host plant. 



( b) Spermogonia and secidiospores on one host plant, uredo and 



teleutospores on another. 



The plants included in the 5th division, section b, are those with which we 

 are now interested. Of these the following is a list so far as known, and of 

 the plants on which they are found : — 



Uromyces Dactylidis, Otth. ^Ecidiospores on Ranunculus bulbosus. Teleuto- 

 spores on Dactylis glomerata and some other grasses. 



Uromyces Poce, Pabh. iEcid. on Ranunculus Ficaria and R. repens. Tel. 

 on Poa nemoralis and Poa pratensis. 



Uromyces Junci, Desm. ./Ecid. on Inula dysenterica. Tel. on Juncus 

 obtusifolius. 



U. pisi, Pers. iEcid. on Euphorbia Cyparissias. Tel. on Vicia Cracca and 

 various species of Pisum and Lathyris. 



Puccinia graminis, Pers. iEcid. on Berberis vulgaris. Tel. on cereals and 

 other grasses. 



P. rubigo-vera, DO. ^Ecid. on Lycopsis arvensis, Echium vulgare, Sym- 

 phytum officinale. Tel. on various grasses. 



P. coronata, Corda. iEcid. on Rhamnus Frangula and R. catharticus. Tel. 

 on various grasses. 



P. Molinice, Tul. Mcid. on Orchis and Listera. Tel. on Molinia ccerulea. 



