38 * A Monograph of the ErysipHxVceae 



the appendages here and there have a tendency to spread, and 

 thus show characters connecting P, oxyacanthae with its var. 

 tridactyla. 



The published records of ''P. tridactyla'' (WaHr.) from Amer- 

 ica (53) (249) (366), etc., almost certainly all belong to P. oxya- 

 cantJiae, as the former name has been in error, commonly used by 

 American mycologists as a synonym of the latter species. 



The Japanese plant occurs on Pnums coninmnis^ and was sent 

 to me by Professor Miyabe. The appendages are few, short, and 

 fasciculately erect, with a large very widely branched apex. 



Schroeter's (319) record of the occurrence of the present plant 

 on Pyn'is Aiicttparia probably refers to P, oxyacanthae. 



McAlpine (225) records ^' P. tridaciyla de Bary" on '* young 

 leaves and shoots of Apple," from Victoria and New South Wales, 

 but very probably this record rests merely on the occurrence of an 

 Oidiuin on this host, and the fungus may prove to belong to P^ 

 leiicotricha ; the Apple is not known as a host-plant for the var. 

 tridacfyla. 



In the present variety the length of the appendages varies 

 from 1-8 times the diameter of the perithecium, and there is also 

 great variation in the manner of the branching of the apex (see 

 Figs. 109-113). 



2. P. SCHLECHTENDALII LeV. [FigS. I 1 8, I23] 



P. SchlecJitendalii Lev. Ann. Sci, Nat III. 15:29. //. 6.f.7' 



185 1 ; Sacc. Syll. Fung, i : 3. 1882. 



Hypophyllous ; mycelium evanescent ; perithecia scattered, 

 subglobose, 78-90 /i in diameter, cells 10-15 fx wide; appendages 

 5—12, unequal in length, 6—12^ times the diameter of the perithe- 

 cium, erecto-fasciculate, springing from the apex of the perithe- 

 cium, and forming a long flaccid, somewhat flexuous bundle, 



which is more or less entangled in the hairs of the leaf, septate, 

 colorless abov^e, occasionally pale brown towards the base, apex 

 2, very rarely 3 times dichotomously branched, end of ultimate 

 branches more or less thickened, primary and secondary branches 

 usually recurved; ascus subglobose, 76-S4 x 68-74 /i ; spores 8, 

 23— 28 X 13-15 /A sometimes slightly curved. 



Hosts. — Salix alba (21^), S. viminalis. 



Distribution. — Europe : France. 



There is a good specimen of this extremely interesting species 



