HYPOCRELLA AND ASCHERSONIA. 257 



mass of extruded spores. Pycnidia up to 0*2 mm. deep, 



cylindric and narrow, or concave and widely open, forming 



irregular shallow pits with a convoluted base ; pycnospores 



orange-yellow in mass, fusoid or narrow-oval, ends pointed 



but not produced, 8-14 X 1 ' 5-2 [k ; paraphyses 50-110 y. long. 



Aschersonia paraensis P. Henn., Hedwigia (1902), p. 17 ; 



Aschersonia flavocitrina in Fawcett, Fungi parasitic on 



Aleyrodes citri, &c., not Aschersonia, flavocitrina P. Henn. 



Herb. British Museum, contains a specimen of this on Vitex, 

 Para, coll. Cockerell, which is apparently part of the type collec- 

 tion; it is identical with the specimen sent by Cockerell to Ellis, 

 and now in the Everhart Herbarium. The stromata are up to 

 4 mm. diameter, almost plane or slightly piilvinate, white, 

 minutely tomentose, with pale orange yellow or yellow spore 

 masses ; the pycnidia are poorly developed and irregularly 

 distributed, the masses of spores forming irregular lines ; a broad 

 membranous hypothallus is present. The type of Aschersonia 

 pmnensis, on Psidium po?niferum, Brazil, in Herb. Berlin, 

 contains pulvinate stromata, up to 1 mm. thick in the centre, 

 circiolar, 3 mm. diameter ; the pycnidia are irregularly oval, 

 convoluted below, and when fully open constitute a convoluted 

 pseudo-disc hidden by a thick mass of spores; the stroma is white 

 and the pale orange mass of spores occupies the centre, leaving 

 a narrow white margin exposed ; the pycnospores are 8-12 x 

 1 • 5 ^, and the parajohyses 50-100 ^long. Herb. Berlin contains 

 two other gatherings under the same name, one, on dead leaves, 

 Rio Jurua, collected by Ule, and the other on Psidium Guayava, 

 Jutuba, Ilha de Marajo, collected by Huber ; in the latter the 

 stromata are up to 3 mm. diameter, often confluent, pulvinate, 

 up to IS mm. thick ; some have a rrembranous hypothallus up 

 to 1 • 5 mm. wide, in others it is wanting. 



From Florida I have examined specimens on Aleyrodes citri. 

 Manatee, Florida (H. J. Webber), and on the same insect from 

 H. S. Fawcett. The stromata are comparatively small, up to 

 2-5 mm. diameter, sometimes furnished with a broad, spreading, 

 membranous hypothallus ; in the flattened-pulvinate examples 

 tl\e pycnidia] orifices are irregularly scattered, but in thin 

 specimens they may be arranged regularly in a circle and radially 

 elongated as in A. placenta ; the spores are 8-14 x 1*5-2 -5 ^, 

 and the paraphyses, 60-100 ^jl long; the flattened-pulvinate speci- 

 mens are exactly A. paraensis. 



Fawcett states that the most evident distinction between 

 A. Gvldiana and A. Aleyrodis, as they occur in Florida, is in the 

 colour. " A. aleyrodis is usually red or pink, while A. flavocitrina 

 is yellow, and never contains any reddish pigment. The stromata 

 of A. aleyrodis, under similar conditions, average less in diameter, 

 and the pycnidial cavities are usually more sunken than in 



