CLASSIFICATION OF THE Sr-HJSRIACET. 47 



they do, from ono to five members, appear to as, unnecessary. 

 Those generic distinctions too, based upon secondary forms of fruc- 

 tification, however scientifically accurate they may be, and however 

 natural they may appear upon paper, will be found, it is feared, not 

 to work well in practice, because they demand a more intimate 

 acquaintance with the life history of each plant, than it is possible, 

 in the first instance, always to obtain. 



Herbarium Myoolooioum CEconomicum. — The second fasci- 

 culus of 50 specimens has just been issued by Baron Thuemen. It 

 fully equals in interest its predecessor, and amongst its contents 

 are — Puccinia Apii, Cd. ; Asparagi, Link; Cerasi, Cd. ; P. coro- 

 nata, Cd., on the oat ; P. Prostii, Duby ; on the garden tulip (Tulipa 

 Gesneriana). Uredo Zeas, Desm., on the maize. This is probably 

 the uredo form of Puccinia Zese, Potsch ; Uromyces Viciaa, Fckl. ; 

 Fusarium Beta3, Rabh. ; Ustilago Sorghi, Pass. ; a new species 

 which infests the seeds of the millet (Sorghum vulgare) ; com- 

 municated by Prof. Passerini : Sphrerotheca Castagnei, Lev. ; on 

 Hibiscus esculentus, from Greece ; Phacidum medicaginis, Lasch. ; 

 (Ecidium alliatum, Rabh., on the shallot (Allium ascalonicium). A 

 new species of Hypoderma, H. longisporum, Hartig., on fir leaves. 

 Ascochyta Tiliae, Lasch.; Uredo fragaria3, Rabh.; Apiosporium 

 Mali, Wallr. ; Cladosporium Fumago, P., on vine leaves ; Anten- 

 natula pinophila, Fr. ; Capnodium Persoonii, B. & D., on horn- 

 beam and lime leaves ; Corticium amorphum, Fr. In Bohemia 

 this is stated to be very destructive to the young fir trees; the 

 affected trees usually perishing between the twelfth and sixteenth 

 year. Acalyptospora nervisequia, Cast., on elm leaves ; Exobasi- 

 dium vaccinii, Wall., on the cranberry ; Torula chrysosperma, Cd., 

 on opium ; Merulius lacrymans, Fr., Saccharomyces Cerevisise 

 Meyen. ; S. Mycoderma, Rees. ; and several other more or less 

 important species. 



The Hollyhock Disease. — During the months of June and 

 July this was reported from different localities in England as having 

 caused considerable damage to Hollyhocks. It is produced by 

 Puccinia malvacearum (Mont.), a fungus not previously observed in 

 this country, which was originally described by Montague as oc- 

 curring on the under surface of the leaves of Althcea officinalis. We 

 have also received specimens on Malva sylmstris, from J. Hussey, 

 Esq., of Salisbury j Dr. Paxton, of Chichester; and Mr. E. 

 Parfitt, of Exeter. 



