MiCROSPHAERA 167 



u 



herbaria, named E. enphorbiac Peck " have all proved on exami- 

 nation to be this species of Sphacrothcca. Lambotte (209 supp.), 

 however, records a plant from Belgium, which may possibly be- 



long to M. enphorbiac. It 



'ph 



Peck," but the brief description given is not sufficient to identify 

 the plant with certainty ; Theques largement ovees 3-4, spores 3-4, 

 epaisses, 25x16; appendices peu longs, flexueux, colores ; pcrithc- 

 cespetits ; mycelium mince. Feuilles d'Euphorbe." 



Microspliacra cuph 



seen 



an authentic specimen of the latter. Burrill speaking of M. en- 

 phorbiac, says (60, p. 26) ^^Erysiphe enphorbiac is evidently the 

 same thing. The name seems to have been founded upon speci- 

 mens in which the appendages were not branched." 



10, M. GuARiNONii Bri. & Cav. [Figs. 42, 44] 

 M. Gnarinonii Bri. & Cav. Fung. Par. n. 172 (cum diag. et 

 icon.). 1892 ; and in Hedwigia, 31 : 142. 1892 ; Cav. in Atl. 

 Istit. Bot. Pavia. II. 3 : 329- 1S94 ; Sacc. Syll. Fung, ii : 252. 



1895. 



Exsicc: Bri. & Cav. Fung. Par. 172. 



Amphigenous; mycelium subpersistent, effused; perithecia 

 more or less densely gregarious, 90-126 /i in diameter, globose- 

 depressed, cells large, evident, 12-20/i wide; appendages 8-20, 

 8-12 times the diameter of the perithecium, colorless, flexuose, 

 aseptate. smooth, hyaline and thin-walled almost to base apex 

 3-4 times dichotomously branched, branching usually lax with the 

 primary branches long, widely spreading, and more or less re- 

 curved, sometimes more compact, tips of ultimate branches re- 

 curved when mature; asci 4-10, ovate-oblong, with or without a 

 short stalk, 5 5-68 x 30-38 « ; spores usually 6, sometimes 4 or 5, 



20-23 X 10-13/^. 



Host. — Laburnum vulgare. 



Distribution. — Europe : Italy. 



A very beautiful species, quite distinct in the very long, flex- 

 uose appendages, 3-4 times dichotomously branched, with the 

 tips of the ultimate branches recurved. 



Briosi and Cavara show the ultimate branches recurved, but 

 figure the tips of these as straight ; this, however, is not the form 

 of the mature apex (see Figs. 42, 44)- The asci are described as 



