HYPOCRELLA AND ASCHERSONIA. 255 



ends rather blunt, 10-14 x 1-2 [>., extruded in coral-red or 

 rufous masses which cover the centre of the stroma ; para- 

 physes Hnear, 65-100 [x long, 0-75-1 [>. diameter. 



This species closely resembles Aschersonia placenta, from which 

 it differs in its thicker stroma and longer paraphyses ; the 

 pycnidial orifices are usually circularly arranged and radially 

 elongated, but, owing to the tliickness and more pulvinate form 

 of the stroma, they are not flat, as in placenta, but subvertical, 

 i.e., on the sloping sides of the stroma. The light and dark 

 lengths in the paraphyses are strongly marked in some examples 

 of this species, but, as in other species, they are not a constant 

 feature. Florida specimens from H. J. Webber and H. S. 

 Fawcett have been examined. A peculiar feature of these 

 specimens, which, however, may not be constant, is the presence 

 of a column (as seen in section) of non-sporiferous tissue in the 

 middle of the pycnidium ; in other species it is, as a rule, possible 

 to wash out all the spores from the section, leaving only the 

 continuous fringe of conidiophores and paraphyses ; but in the 

 specunens of A. Aleyrodis examined, this fringe is interrupted 

 in the middle by a column of tissue continuous with the tissue 

 of the stroma. 



Distribution. — Florida, specunens per H. S. Fawcett and H. J. 

 Webber in Herb. Peradeniya. Trinidad, ex Herb. Thaxter. 

 The Japan and Foi*mosan specimens attributed to Aschersonia 

 Aleyrodis are Aschersonia Tamurai, A. hypocreoidea, and A, 

 Coffeas. 



Figures. — Plate 3, fig. 44, old herbarium specimen, Florida, 

 X 10 ; Plate 5, fig. 44, section, x 10. 



Aschersonia hypocreoidea (Cooke & Massee) Petch. — Stro- 

 mata circular or oval, up to 3 mm. diameter, almost plane, 

 about 0-25 mm. thick, tomentose or byssoid, sometimes 

 surrounded by a thin, membranous or powdery hypothallus, 

 white, rarely yellow. Pyenidia in the centre of the stroma, 

 arranged irregularly or in a circle, concave, widely open, 

 sometimes somewhat flask-shaped and convoluted at the 

 base ; spore masses pale yellow or orange yellow, distinct 

 or confluent ; pycnospores narrow-oval or lanceolate, ends 

 pointed but not produced, 8-13 X 2-2*5 [i. ; paraphyses up 

 to 120 [K long. Fusarium hypocreoideum Cooke & Massee, 

 Orevillea, XVI., p. 76 (1888) ; Aschersonia Zenkeri P. Henn., 

 Engler's Bot. Jahrb., XXIIl. (1897), p. 541. 



The type specimen of Fusarium [Selenospora) hyp§creoideum 

 in Herb. Kew, ccntaii s small specimens, up to 1-2 mm. diameter 

 sometimes with a powdery or membranous hypothallus up to 1*5 



6(9)21 (34) 



