SPH^RIACEl. 837 



Series 5. Pseildovalsa. Sporidiamultiseptate, hyaline or 



coloured. 



2507. Valsa detxusa. Fr. " Barberry Valsa." 



Conical ; stroma bright yellow, immersed in the wood, encir- 

 cled above with a conceptaculum ; ostiola united, umbilicate ; 

 sporidia biseriate, colourless ; endochrome quadripartite, elliptic. 

 — Sph. detrusa, Fries exs. no. 6. Berk. Mag. Zool. c^* Bot. no. 18. 

 Curr. Linn. Trans, xxii. t. 47, f. 117. Wiiestneia ceqaili?ieariformis, 

 Fchl. exs. no. 588. Diaporthe detrusa, Fckl. Syni. Myc. p. 205. 



On dead barberry. 



Sporidia ("0006 in.) '015 m.m. long. Endochrome divided into four, some- 

 times apparently into only two portions, elliptic, subobtuse or subacuminate. 

 —F.C. 



2508. Valsa platanoides. BerTi. " Sycamore Valsa." 



Perithecia circinating; disc irregular, obliterated by the crowded 

 ostiola ; sporidia triseptate, or ap)parently so, sometimes mucro- 

 nate. — *S'. 2)latanoi'7es, Pers. Syn. p. 45. S. stilbostoma, var. y. 

 Eng. Fl. v.p 251. Curr. Linn. Trans, xxii. ^.48,/. 140 a. 



On sycamore. 



Considered by Fries a variety of V. stilbostoma. Sporidia (•OOIO-'OOU in.) 

 •025-*028 m.m. long. 



2509. Valsa tetratrupha. B. 4' Br. " Four-spored Valsa." 



Pustules minute ; perithecia ovate ; asci linear, sporidia four, 

 fenestrate.— i?. 4' Br. Ann. N.H. no. 852, 1. 10, f. 13. 



• On twigs of alder. 



Forming minute pustules whicli pierce the cuticle by means of the flat 

 pallid disc, studded with black ostiola ; asci linear ; sporidia four (•00U9-'00l 

 in.) •022-'025 m.m. long, yellow-brown, at first uni triseptate, at length fenes- 

 trate. Fruit strongly resembling that of S. elongata.—B. d; Br. 



It is considered by some mycologists that the present species and Valsa 

 fenestrata are not really distinct, but forms of the same species. 



2510. Valsa fenestrata. B. tfc Br. " Fenestrate Valsa." 



Perithecia brown; ostiola obsolete ; sporidia elliptic-oblong, 

 uni-triseptate, appendiculate at either end, fenestrate. — B. 4' Br. 

 Ann. N.H. no. 853, 1. 10,/. 14. Fckl. exs. no. 1999. Fenestrella 

 princeps, Tul. Carp. ii. p. 207 . Fckl. Sym. Myc. t. 6,f. 15. 



On dead oak twigs and alder. 



