ASCOCHYTA. 



473 



this fungus is injurious to Pisum sativum, Fha.scolns vu/ffaris, 

 Vicia sativa, etc. It causes spots on leaves and pods, followed l)y 

 drying up of the former and deformation of the latter. The 

 pycnidia appear as tiny points on the spots, and give out bicellular 

 cylindrical coiiidia. 



As. Boltshauseri Sacc.^ 

 This species was first observed 

 in Switzerland on bean (PA «- 

 seolus vulgaris). Leaves of all 

 ages become brown -spotted, 

 and premature defoliation may 

 follow. The spots are marked 

 by concentric zones, and bear 

 pycnidia. The conidia are 

 two- to three-celled, being 

 distinguished in this and by 

 their larger size from tlie 

 preceding species. 



The following species 

 quent living leaves : 





~X/ 



fre- 



N/ 



Oil 



Fig. '29c.—Ax<orl,,,i,t jiixi on Pea. Eiiliirged 

 section of pycnidia, and still more enlarged 

 conidi.i. (v. Tiibeuf del.) 



On leaves of tlie ash in .Seotlaiid. 

 On Jnnoraciif nisticdiHi (Iforse-radisli). 



Ascochyta tremulae Tliiii 

 the aspen. 



A. metulispora, B. et Bi 



A. armoraciae Fiirk. 

 (Britain.) 



A. periclymeni Thlim. On Lonicera Perichpaeimm. 



A. maculans Fuck. On Hederu Ilclix. 



A. Ellisii Thiim. On Vitis Lahrusca in America. 



A. brassicae Tliiim. < >ii Brassica oleracea. 



A. dianthi (A.S.). On Diantlms. (Britain.) 



A. pallor Berk. On Ruhus Iddem. (Britain.) 



A. viciae Trail. On Via'ti. sepiam, etc. (Britain.) 



A. malvicola Sacc. On Jfalva si/lvestn's. (Britain.) 



A. graminicola Sacc. On various grasses. (Britain.) 



A. scabiosae Eabli. On Knautia arvensis. 



A. nicotianae Pass. On Nicotiana TaJxtccnm. 



A. digitalis Fuck. On DifjitaliK pnrjuired. 



A. fragariae Sacc. has been found injurious to tlie strawb 

 Tiiited .States. 



A. aspidistrae given (d'ardeners Chronicle, xvii., l^tiJ.j) a 

 Aspidistra in Britain. 



^ Boltshauser-Amrisweil, Zeitxchrijt f. Pflanztnhankhdliu, 



parasite <in 



