420 SPH^EOXEMEI. 



1218. Phoma piceum. B.d: Br. " Pitchy Phoma." 



Hypophyllous ; perithecia spurious, pitch-brown, convex, 



closely connected with the epidermis ; spores oblong-elliptic. — 



B. 4- Br. Ann. N.H. no. 399. 



On the under surface of dead rose leaves. Feb. 



Scattered, pustules conspicuous, convex, pitch-brown ; cuticle closely con- 

 nected with the spurious perithecia; spores pure white, minute, oblong- 

 elliptic, with a sporule at either extremity.— £. <& Br. 



1219. Phoma sticticum. B. <f Br. " Pied Phoma." 



Scattered; very minute ; covered by the cuticle, which at length 

 splits longitudinally ; spores oblong-elliptic, with a sporule at 

 either extremity. — B. ^- Br. Ann. N.H. no. 400. 



On dead twigs of box. Feb. 



1220. Phoma e:siguum. Desm. *' Little Phoma." 



Perithecia numerous, scattered or approximate, small, rounded 

 or ovate, opening with a pore, covered by the cuticle, brownish 

 when moist, blackish when dry, and rather shining. Spores nu- 

 merous, ovoid, very minute, hyaline. — Desm. exs. no. 1869. B. ^ 

 Br. Ann. N.H. no. 400.* 



On shoots of elder, &c. 



Spores about ^ m.m. Very different from Sporocadvs exiUs, Corda, 

 and He/idersonia exilis, Lev., to which some authors have referred it. 



1221. Phoma devastatirix. B.^^Br. " Destructive Phoma." 



Perithecia very minute, punctiform, black, globose ; spores 

 oblong, 2-3 nucleate. — B. 4" Br. Ann. N.H. no. 813. 

 On Lobelias. Aug. 



This minute species, all but invisible to the naked eye, was most destruc- 

 tive in gardens in 1856. The perithecia are globose, and perforated with a 

 minute round aperture ; the spores are oblong, hyaline, containing from 2 

 to 3 nuclei •CU04--00033 in. ('Ol-'OOS m. m.) \ong.—B.<hBr. 



1222. Phoma m.icroscopicum. B.^'Br. " Microscopic Phoma." 



Perithecia subglobose, scattered beneath the epidermis, which 

 is blackened above the ostiola, spores oblong-elliptic. — B. & Br. 

 Ann. N.H. no. ^01. 



On dead stems of Potamogefon. 



Forming scattered, very minute dark brown dots on discoloured patches ; 

 beneath each dot is seated a distinct subglobose, smooth perithecium,_ with 

 no visible mycelium, very slightly conical above, pierced with a round simple 

 ostiolum. Spores oblong-elliptic, variable in size, having occasionally, but 

 not constantly, a sporidiolum at either extremity.— .B. d: Br' 



