HYPOCRELLA AND ASCHERSONIA. 2651 



distincte circinatini congeste, minutis, 100-200 ^. diam., 

 globulosis, maigine albido alatis, oehraceis ; pycnidiis omnino 

 immersis ; basidiis obtusis, 12-16 [), longis, 1*5-2 [k latis : 

 sporulis oblongis, utrinque obtusis, continuis, hyalinis, 5-6 [>. 

 longis, 2-2 • 5 [k latis. Palawan, Taytay, Merrill 8,855, May, 

 1913. On living leases of Misclwcarpns." 



I h&,\e examined, through the kindness of the Director, the 

 half of this collection, Merrill, 8,855, which was retained by the 

 Bureau of Science, Manila. The stromata, which are very small, 

 bear some superficial resemblance to those of Aschersonia Cojfes?, 

 but they do not yield any colour with potash. The stout basidia, 

 as described above, also resemble those of ^4. Coffe$e. Sections, 

 however, show that the fungus is not Aschersonia. The stromata 

 are up to 0-6 mm. diameter, flattened-pulvinate or placentiform, 

 0*1 -0*15 mm. high, irregularly circular, with a very narrow 

 margin. They are formed by hyijhse, which break through the 

 epidermis of the leaf in a stout bundle and .spread out over its 

 svirface. The context of the stroma is compact, composed of 

 interwoven liyphae, and there are no pycnidia. The basidia 

 cover the whole of the surface of the stroma, including the convex 

 sides. It appears to be a Hyphomycete, near Tubercularia. 

 The spots on the leaf, in the part of the specimen seen by me, 

 have no necessary relation to the stromata. The latter are 

 parasitic on the leaf, but their effect appears to be confined to a 

 .small brown region beneath each .stroma. 



Aschersonia microspora Sacc, Atti dell' Accad. Veneto- 

 Tientino-Istriana, X. (1917), p. 81. 



Specimens in Baker, Fungi Malayana, No. 304, on Schizo- 

 stachyuni, includo circular,, slightly convex, compact, pale brownish 

 stromata, up to 15 mm. diameter, immature; and cii'cular, 

 white, flat, pruinose or fibrillose strcnaata, up to 2 mm. diameter. 

 Some of the latter bear a central, orange mass of .spores, others 

 bear minute scattered masses, while on others the spores are 

 not yet developed. When examined under a low power, the 

 latter are seen to be covered by a white, powdery mould, which 

 sometimes extends on to the leaf. This mould is apparently an 

 Oospora, with narrow-oval spores borne ternainally and laterally, 

 about 3 X 1 '5 [i,. The stromata which bear minute, scattered 

 spore-masses have this mould between the latter. On the 

 stromata with ajiparently normal spore-masses covering nearly 

 the whole surface there is no pycnidium, but the spore-bearing 

 surface is covered with densely-packed, erect ba.sidia, up to 12 ^ 

 high ; the spores in the mass above this are either globose, 

 1 '5 ^, diameter, or narrow-oval, 2-4 x 1 '5 ^. ; at the edge of the 

 stroma, the hyphce of the Oospora can be distinguished. 



This gathering appears to be an abnormal development of an 

 Aschersonia, due to the parasitism of an Oospora, sin"^ilar to the 

 cases cited under Aschersonia placenta. The original Aschersonia 

 appears to be Aschersonia placenta. 



