MYC0LOUICAL NOTES 17 



Fir, and are exactly what Lind intends: they also agree with what 

 Hartig says and figures so closely that there can be no doubt it is 

 the same fungus which he had before him. The description is as 

 follows : — • 



Pvcnidia densely scattered, convex, erumpent, black, 200 -300 p 

 diam., usually more or less mouthless, sometimes pseudolocellate 

 within ; upper part of wall composed of many thick and dark- 

 brown layers. Spores oblong-fusoid, subacute below or at both 

 ends, o-b x L.j-2 /i, rarely 1-guttulate ; sporophores linear-subulate, 

 7-10 X 1 fi, crowded, mostly straight, but unequal in length, rising 

 from a thick pale olivaceous brown stratum. 



There is a great similarity between this fungus and Fusicoccum 

 abietinum Prill. & Del. (Sice. S y 11. x. 241), which = Dothiorella 

 pithya Prill. & Del. in Bull. Soc. Myc. Fr, 1890, p. 98, pi. 15, 

 Hgs. 9-11. and is larger in all respects, the spores especially being 

 12-14 x 5-3 ju. But it is extremely likely that this is another 

 instance of that dimorphism which is well known in relation to 

 Phomopsis qurrclna v. Holm, and Fusicoccum querclnum Sacc. In 

 the latter case there can be found on twigs and branches of Oak every 

 possible transitional state between the two, the spores of the 

 Phomopsis state being 7-10 X lg-2 p, and of the extreme Fusicoccum 

 state 15-16 X 3-3| ju. In Phomopsis abietina there seems to be 

 a still greater complexity, viz. a Phomopsis state, a Fusicoccum 

 state, and a Dothiorella state ; and, after all, it is by no means 

 improbable that the fungus called Sclerojjhoma fithya is nothing 

 but a subsclerotioid state of the same species. Whatever the others 

 may be, the Phomopsis state is a decided parasite, doing great harm 

 to numerous species of Coniferae on the Continent, and may become 

 equally dangerous in the Scottish forests. 



NOTES ON JAMAICA PLANTS. 

 Br William Fawcett, B.Sl., and A. B. Rendle, F.R.S. 



(Continued from Jouin. Bot. 1919, p. 314.) 



EUPHORBIACEiE.— III. 



Piiyllanthus cauliflokus Griseb. A specimen sent by Dr. Brit- 

 ton differs from the specimens from Swartz, which represent all that 

 has hitherto been known of this species, in having inflorescences on 

 the branch as well as on the trunk, thus combining the inflorescence 

 characters of the two species, P. caulijlorus Griseb. and P. axillaris 

 Muell. Arg. Specimens of this group of species, P. caulijlorus, 

 P. axillaris, and P. cladanthus are much desired. (Fawc. & Rendle, 

 Flor. Jam. iv. 258.) 



RUTACEvE. 



" Rhus ? 1. Foliis piuiialis ovato-acuminatis subtus villosis, 



Jloribus racemosis tetrandris terminatricibus.'" Tab. 8, fig. 3, Patrick 



Browne, Nat. Hist. Jam. 186. There is a leaf of this plant from 



Browne in the Linnean Herbarium at the end of the Rhus cover, with 



Journal or Botany. — Vol. 59. [January, 1921.1 c 



