HARDWICKE'S SCIENCE-GOSSIP. 



173 



leaves of hawthorn, common ; the conidia stage very 1 

 abundant in spring. 



Microsph^ria, Let'. Perithecia globose, with 

 many asci ; appendages dichotomous. 



M. Hedzuigii, Lev. Hypophyllous ; conceptacles 

 minute ; appendages few, scarcely longer than the 

 perithecia ; asci 4, containing 4 spores. On mealy 

 Guelder Rose (fig. 113). 



M. penicillata, Lev. Appendages 8-12, equal to 

 diameter of perithecium ; asci 4, containing 8 spores. 

 On Guilder Rose and Alder. 



M. mougeotii, Lev. Appendages loosely dichoto- 

 mous ; asci 12-16, 2-spored. On leaves of Lycium 

 barbarum. 



M. berberidis, Lev. Mycelium web-like, persistent; 

 appendages 5-10, long, divaricate, obtuse; asci 6 ; 

 spores 6-8. On Berberry, — abundant. 



M. grossularitz, Lev. Mycelium web-like ; perithecia 

 scattered ; appendages 10-15, vaguely dichotomus ; 

 asci 4-8, spores 4-5. On gooseberry-leaves, — very 

 common. 



M. comala, Lev. Perithecia scattered, minute ; 

 asci 8, ovate beaked, containing 4 spores. On 

 Euonymus. 



Fig. 113. Microsphteria. Fig. 114. Erysiphe Montagtui. 



Erysiphe, Hedw. Mycelium arachnoid ; appen- 

 dages floccose, simple or irregularly branched. 



* Asci 2-spored. 



E. Liukii, Lev. Perithecia minute, scattered ; asci 

 8-20, pyriform ; appendages interwoven with the 

 mycelium. 



E. laiHprocarpa, Lev. Perithecia minute, globose, 

 scattered or gregarious; appendages coloured; asci 

 8-16, shortly pedicellate. On Salsafy, Plantain, &c. 



** Asci 3-8 spored. 



E. graminis, D.C. Mycelium effuse, floccose; peri- 

 thecia large, hemispherical, at length depressed and 

 semi-immersed ; appendages simple ; asci 20-24. On 

 various grasses — autumn. 



E. Martii, Lk. Mycelium web-like, often evanes- 

 cent ; perithecia globose, varying from yellow to 

 black ; appendages short ; asci 4-8, globose, with 

 4-8 spores. On Peas and Umbelliferse, — very common. 



E. Montagnei, Lev. Perithecia minute, globose; 

 appendages distinct from mycelium ; asci 8, spores 

 2-3 (fig. 114). 



E. tortilis, Lk. Perithecia minute, globose ; ap- 

 pendages veiy long, 10 times diameter of perithecium ; 

 asci 4, with 4 spores (fig. 115). 



E. communis, Schl. Mycelium effuse, evanescent 

 or persistent ; perithecia small ; appendages short ; 

 asci 4-8, ovate-rostrate, 4-8 spores. On various Legu- 

 minosre, Ranunculus, &c. 



E. horridula, Lev. Mycelium web-like ; perithecia 

 clustered ; asci 20- 24, oblong, attenuated, with 3-4 

 spores. On Bugloss. 



Ch^tomium, Kunze. Perithecia thin, brittle, 

 mouthless ; asci linear ; spores lemon-shaped. 



C. datum, Kze. Perithecium sub-ovate, hairs on 

 vertex very long, interwoven, branched ; base of 

 perithecium fibrose ; sporidia broadly apiculate. On 

 straw. 



C. chartarum, Ehb. Perithecium subglobose, 

 black, surrounded by a bright yellow spot ; spores 

 subglobose (fig. 116). On paper. 



C. glabrum, B. Recorded by Berkeley, not de- 

 scribed ; cf. " Grevillea," ii. p. 165. 



C. murorum, Corda. Gregarious, glaucous blackish ; 

 perithecium sub-globose, brown, hairs circinate, 



Fig. 115. Erysiphe tortilis. Fig. 116. Cluttomiitm chartarum. 



pulverulent, erect, septate ; spores oblong. On 

 plaster. 



C. griseum, Cooke. Subgregarious or scattered, 

 grey or cinereous ; perithecium globose, brown, sub- 

 membranaceous; hairs long, elastic, circinate, pellucid; 

 asci clavate, fasciculate ; spores lemon-shaped, colour- 

 less, endochrome granular. On old sacking. (Cooke 

 in " Grevillea," i. p. 175.) 



C. funiculum, Cooke. Perithecia scattered, sub- 

 ovate, black ; hair on vertex veiy long, dichotomous 

 or simple, erect, slender, acute, black ; sporidia 

 lemon-shaped, dingy brown. On twine. British 

 Museum. (Cooke in "Grevillea," i. p. 176.) 



Ascotricha, Berk. Perithecium thin, free, 

 mouthless; threads loose, branched, conidiophorous; 

 asci linear ; spores, dark elliptic. 



A. chartarum, B. Perithecia olive-brown. On 

 paper. 



Eurotium, Link. — Perithecia reticulated, ves- 

 cicular, coloured, attached to mucedinous threads. 



E. hcrbariorutn, Link. — Perithecium spherical, 



