652 



PERISPOEIACEI. 



1930. Erysiphe communis. Sclil. *' Buttercup Blight.' 



Hypophyllous ; mycelium effuse, web-like, evanescent or per- 

 Bistcnt ; conceptacles minute, globose, scattered or gregarious; 

 appendages short ; sporangia 4-8, ovate, rostrate, -with 4-8 

 spores. — Lev. Ann. Sc. Nat. 1851, xv. p. 171, 1. 11, f. 38. CooJce 

 3I.F.t.x\lf. 240-24:2. Cooke exs. no. 99. Eng. Fl. x. p. 325 

 (jmrtbj). Tul.Carp.i.p.2U,t.6, f.S-7. Fckl. exs.no. 676-686. 

 Berk. exs. nos. 200-203, 269-313. 



On leaves of Ranunculacece, Leguminosce, &c. Autumn. Com- 

 mon. [United States.] 



1931. Erysiphe horridula. Lev. " Bugloss Blight." 



Amphigenous; mycelium web-like, sometimes persistent; 

 conceptacles minute, globose, scattered, or clustered ; sporanges 

 20-24, oblong-ovate, attenuated downwards, containing 3-4 

 spores ; appendages short, flexuose, and bent upwards. — Lev. 

 Ann. Sc. Nat. 1851, xv.^. 170, t. 11, /. 37. Cooke Seem. Journ. 

 Fckl. exs. no. 688. 



On leaves of Lijcopsis arvensis. Oct. [Low. Carolina.] 



Gen. 283. 



CH.5:T0IVIIU]»I, Kze. 



Perithecium thin, brittle, mouthless ; spo- 

 rangia linear, containing dark lemon- 

 shaped sporidia. — Berk. Outl.p. 405. Eng. 

 Fl.Y.p.^21. {Fig. 318.) 



Fig. 318. 



1932 Chaetomium elatum. Kze. " Straw Bristle-Mould." 



Perithecium sub-ovate, base radiato-fibrose, hairs of the ver- 

 tex very long, interwoven, branched ; sporidia broadly elliptic, 

 apiculate at either end. — Kunze M.H.i. t. i. /. 3. Grev. t. 230. 

 Fr. S.M. ni.p. 254. Fr.exs. wo. 459. Cooke M.F. t. xii./. 257-259. 

 Cooke exs. no. 100. Eng. Fl. v./>.328. Fckl. exs. no. 646. Sphceria 

 scopnla. Soiv.t. S86,f. 4r. Berk.exs.no. Ad. 



On mouldering straw, &c. Common. 



[Low. & Mid. Carolina.] 



It has been stated that Sporodum conopleoides is the conidiophorous state of 

 this species. — See No, 1756j ante. 



