SPH^EOXEMEI. 41 7 



The perithecium is extremely thin, and it leaves, when fallen off, a pale 

 .brown spot, surrounded by a little raised line. Other less perfectly defined 

 spots, but of the same size, accompany the perfect plant, which are either 

 old worn indi\aduals, or an imperfectly developed state ; occasionally in the 

 centre of these there is a white spot. — M.J. B. (Fig. 1^9.) 



Leptostroma JUXcrxuM, Fr, (Berk. exs. tw. 197) is undoubtedly the sty- 

 losporous condition oi Dothidea jund. 



Leptostroma FiLicixuii, Ft. (Cooke exs. 710. 334) is an incomplete condi- 

 tion of iJothideaJilicma Fr. 



Leptosteoma tulgaee, Fr. is an imperfect state of Hysterium commune, 

 Fr. 



1207. Leptostroxna litigiosum. Desm. '' Minute fern 



Leptostroma." 



Peritliecia somewhat rounded, very minute, punctiform, scat- 

 tered or clustered together, brown-black, sub-opaque, at length 

 wholly seceding. — Desm. Ann. Sc. Xat. 18-43, xix./), 338. Moug. 

 exs. no. 673. Cooke exs. no. 335. 



On dead Pteris aquilina. [Low & ]\Iid. Carolina.] 



Much smaller than L. filicinuvi. Probably a condition of some ascigerous 

 fungus. 



1208. Leptostxosna spireae. Fr. "Meadow-sweet Leptos- 



troma." 



Conglomerate, connate, irregular, rugose, shining grey within, 

 at length separating entirely at the base. — Eng. Fl.Y.jp.2^^. 

 CooJce exs. no. 333. Berk. exs. no. 46. 



On dead stems of Spircea ulmaria. Spring. Common. 



[Low. Carolina.] 



Gen. 104. PHOMA, Fr. 



f^ Perithecium punctiform or subglobose, 



^ often spurious, or incorporated with the 



matrix, discharging the minute simple spores 

 by a small orifice at the apex. Spores mostly 

 hyaline.— 5er/j. Outl.p. 314. {Fig. 150.) 



Probably none of the species are autonomous, but 

 Fig. 150. they must he retained under this genus until satis- 



factorily referred to the higher forms to which they 

 respectively belong. 



