HYPOCRELLA AND ASCHERSONIA. 249 



surrounded by a white tomentose swollen border, or some- 

 times with a white tomentose central area also ; conidial 

 mass red -brown. True pycnidia absent (?), the sporiferous 

 area flat ; conidia narrow-fusoid, ends tapering and pointed, 

 10-14 X 0*75-1 '5 ^; paraphyses linear, up to 100 [jl long. 

 Ascigerous stroma develoj)ed on the margin of the conidiifer- 

 ous stroma, or independently ; circular or oval, up to 4 mm. 

 diameter or 5 x 4 mm., up to 2 mm. thick, plane or slightly 

 pulvinate, tuberculate ; tubercles rounded above, up to 0'4 

 mm. high, and * 4 mm. diameter at thebase ; substance rather 

 loose ; white or cream coloured, ostiola dark-brown. Peri- 

 thecia one in each tubercle, ostiola projecting, flask-shaped, 

 • 5 mm. deep, " 3 mm. diameter ; asci 200 X 8 (x ; part-spores 

 narrow-oval to fusoid, ends rounded or pointed, sometimes 

 slightly inequilateral, 10-16 X 2-3 [;.. Hypocrella amazonica 

 P. Henn., Fungi Amazonici II., Hedwigia, XLIII., p. 246 

 (1904). 



The type speciinen in Herb. Patouillard, on leaves of 67oanco sp., 

 Guadeloupe, is on an Aleyrodes. The stromata are circular or 

 oval, pulvinate, tuberculate, now dirty brown to whitish, slightly 

 translucent, with or without a narrow subfibrillose hypothallus; 

 some effete Aschersonia strornata ( ?) are present, which apparently 

 indicate that this stage may vary to a form with fairly regularly 

 arranged pycnidia. 



The description of the Aschersonia stage given above is taken 

 from the type specimen of Hypocrella amazonica P. Henn. ; this, 

 " E. Ule, Herbarium Brasiliense, No. 3,198. On Stcrculiacese, 

 Peru. Iquitos, July, 1902," is in Herb. Berlin and Herb. Kew. 

 This contains conidial forms, mixed conidial and ascigerous forms, 

 and purely ascigerous forms. Some of the stromata are crowded 

 with tubercles, others scarcely tuberculate. The mass of conidia 

 may be circular, occupying the centre of the stroma, or ring- 

 shaped, with central and marginal white areas; there does not 

 appear to be any pycnidium in these, the conidiophores arising 

 from a flat sunken area. The perithecia are embedded in the 

 loose tissue of the tubercle and underlying stroma, except at the 

 apex, which projects about 50 ^. The asci are chiefly immature, 

 but some part spores, cylindric, 8-14 x 1 \J., can be found. 



Distribution. — Peini, in Herb. Kew and Herb. Berlin {H. 

 amazonica). Guadeloupe, in Herb. Patouillard. Trinidad, 

 in Herb. Thaxter. 



Figures. — Plate 3, fig '^0, Hypocrella, with Aschersonia, ex type 

 of Hypocrella amazonica, x 12 ; Plate 3, fig 40, Hypocrella, ex 

 type of Hypocrella amazonica, x 8; Plate 5, fig. 38, section, 

 Hypocrella and Aschersonia, x 4, 



