Pyrenomycotese, Perisporlacese, Microspheera. 369 



octosporis, mox evauidis, iti quoque perithecio pluribus, 50 [x. diam. ; 

 sporidiis ovatis, luteolis, echinulatis, 15-20 s 12. 



Hab. iii pileo Arrheniae Auriscaipii in silvis umbrosis, 

 Val di sole Tirolia^ italicae. — Etsi raatrix tara absona, species 

 generis optima videtur. 



5. Microsphaera Viburni Howe in Bessey The Erysiph., M. spar^sa 1563 

 Howe — Myceiio arachnoideo; peritheciis sparsis, globosis; appen- 

 diculis subvigiiiti vel paucioribus, perithecii diametro longioribus, 

 dichotorae ramosis, apicibus plus minus curvis; ascis 6-10; spori- 



diis ut plurimum 6. 



Ilab. iti foliis Viburni Lentaginis ia Araer. bor. (Howe). 



6. Microsphaera Platani Howe in Bessey The Erysiph. p. 9. — My- 1554 

 celio evanescente; peritheciis minutis, globosis, sparsis; appendiculis 

 10-18, porithecii diaraetro longioribus, apicibus veliementer cur- 

 vatis; ascis 4-5; sporidiis 4-5. 



Ilab. iu foliis Platani in Araerica boreali (Howe). 



7. Microsphaera Symphoricarpi Howe in Bessey The Erysiph. p. 9. — 1565 

 Mycelio effuso, subpersistente ; peritheciis sparsis v. confertis ; ap- 

 pendiculis 8-16 , perithecii diametro bis-quater longioribus , ter- 

 quinquies dichotomis, raraulis divaricatis, saepe truncatis, reclis ; 

 ascis 4-6; sporidiis 3-5. 



Hab. in foliis Syraphoricarpi racemosae ia America bor. 

 (Howe). 



8. Microsphaera Menispermi Howe in Bessey The Erysiph, p. 9. — i566 

 Mycelio arachnoideo, elfuso, subinde evanido; peritheciis sparsis 



v. gregariis miuutis, globosis; appendiculis, 10-20, perithecii diarae- 

 trura subaequantibus; ascis 5-6; sporidiis 3-6. 



Hab. in foliis Menisperini canadensis in America bor. 

 (Howe), 



9. Microsphaera densissima (Schw.) Peck. — Adde: peritheciis sparsis; 

 appeiidiculis 6-10; ascis 4-8; sporidiis 8 (Conf, Bessey Tlie Ery- 

 siph. p. 1 1). 



10. Microspiisera elevata Burrill in Bessey The Erysiph. p. IJ. — i567 

 Epiphylla; mycelio arachoiioideo, subevanido ; peritheciis conspicue 

 reticulatis, 1 mra. diara,, prominentibus ; appendiculis circ. 12, basi 

 coloratis, simplicibus, subinde prope basim raraosis, solito bis-qua- 



ter dichotoine furcatis, longissimis; ascis, 4, ovoideis, conspicue ro- 

 stratis. 



Hab. la foliis Catalpse in America bor. — Asci 6-8-spori. 



24 



