430 



effused blackish Dia-porthe-like stain. Spores oval-oblong or even 

 subcylindrie, but often strictly fusoid, mostly acute at both ends, 

 occasionally rounded above, biguttulate, 8-10 x 2-5-3 p.] sporo- 

 phores subulate, pointed, 12-15 a long, with a base 2*5-3 jx wide, 

 rising from a dark-olivaceous stratum. (Fig- 2, a.) 



On dead stems of Spiraea Aruncu$ 9 France (Desm. Crypt. Fr. 

 ser. i. no. 481!; Bourn. Fung. Gall. exs. no. 1109! p.p.)- Un- 

 doubtedly the spermogone of Diaporihe Lirella, Fckl. 



When old the upper part of the pycnidium disappears, as often 

 happens in some species of Phomopsis; they may then look like an 

 old Leptostroma. The sporophores seem to lengthen after they 

 have lost their spore, and look like " paraphyses " ; in fact such 

 structures have often been called by that name, both in the Coelo- 

 mycetes and in the Uredinales. The British specimens on 

 Spiraea Ulmaria, Kew Gardens, recorded by Cooke under the 

 name Phoma Spiraeae, are mixed with Leptostroma spiraeinum 

 Vest, (which Cooke mistook for Diaporihe Lirella), but they are 

 certainly not a Phomopsis. 



823. Phoma Phytolaccae, Berk $ Curt. 



Phomopsis Phytolaccae, Grove, in Kew Bull., 1917, p. 66. 



Septoria phlyctaenoides, Berk. & Curt, in Grevill. iii. 10. 

 Phlyctaena septorioides, Sacc. 

 Phlyctaena xagabunda, Desm. f. Phytolaccae. 

 Non Phoma maculans, Cooke, in Herb, in Phytolacca decandra, 

 Marseilles. 



Pycnidia densely scattered, situated beneath the bleached 

 epidermis, oblong-hysteriiforni with an impressed pore, or sub- 



globose-depressed with occasionally a small papilla, at length 

 erumpent by the vertex, black, up to 400 or 500 p long. A-spores 

 fusoid, more tapering below, bi-tri-guttulate, 9-10 p. long ; sporo- 

 phores subulate, a little longer than the spore, (Fig. 2, b.) 



On dead stems of Phytolacca, New Jersey (Herb. Berk. no. 

 4702!). It has been suggested that this is the pycnidial stage 

 of Diaporihe aculeata, Sacc, but see below. 



The description is taken from Berkeley's original specimens. 

 Berkeley noted at the time the resemblance of the spores to those 

 of Phoma pollens, Berk. & Curt., which of course was merely the 

 result of their being congeneric (See p. 184, supra). 



On other specimens of this fungus (Ell. & Ev. North Am. Fung. 

 eer 2, nos. 2552! and 2939!) equally from New Jersey, both B 

 and C spores, in addition to the A-spores, occur abundantly as 

 described below. It is worthy of notice that here again all attempts 

 to find the three kinds of spores in the same pycnidium failed; 

 A and B, B and C, as well as A and C spores could be found 

 together, but not A, B, and C. This may depend upon the pro- 

 duction of the spores at different periods of the life-history of the 



fungus, though this supposition does not entirely explain the 

 matter. 



^ The sketch given here, showing A and C spores growing side by 

 side, can be exactly paralleled by one made by Berkeley on the 

 sheet of his specimens of Phoma mixta on Datura (see p. 186, 

 svpra) z$ long ago as 1873, which shows accurately A and B spores 



