HYPOCRKLLA AND ASOHERSONIA. 253 



Figures. — Plate 3, fig. 51, specimen px type of Aschersonia 

 flavocitrina, x 6 ; Plate 5, fig. 52, section, x 5. 



Aschersonia Tamurai P. Henn., Engler's Bot. Jalirb., 



XXXI., p. 741 (1902). — Stromata circular or oval, up to 1*5 



mm. diameter, discoid or flattened pulvinate, up to 0'5 mm. 



thick, sometimes with a narrow, membranous or fibrillose 



hypothallus up to 2 mm. broad, waxy ; orange, pale yellow, 



or white. Pycnidial orifices more or less circularly arranged, 



circular, few ; pycnidia flask-shaped, up to 0'3 mm. deep and 



0' 15 mm. diameter, or subglobose ; pycnospores extruded in 



a reddish-orange mass, fusoid, 8-12 x l'5-2 (jl ; paraphyses 



about 50 jjL long. 



The t^pe specimen, on Quercus cuspidata, Japan, in Herb. 

 Berlin, contains stromata up to 2 mm. diameter, with or without 

 a thin, membranous hypothallus ; the stroma is pale yellow or 

 white, and the spore mass orange ; there are also old, black, effete 

 speciniens, in which no details are recognizable. Specimens, ex 

 Herb. Sydow, on Ilex pedunculosa, Japan, contain stromata as in 

 the type, others depressed in the centre, and some reduced to a 

 horseshoe-shaped stroma surrounding the scale ; some have a 

 narrow, white, fibrillose hypothallus ; this gathering is mixed 

 with the sterile, lenticular, purple-red stroma which is frequent on 

 Aleyrodidie in the Eastern tropics (Aschersonia zeylanica Berk, 

 in herb.). In Herb. Sapporo, there are specunens of Aschersonia 

 Trmiurai on Aleyrodes citri, September 4, 1906, attributed to 

 Aschersonia Aleyrodis. Aschersonia Tamurai rather closely 

 resembles some forms of Aschersonia placenta. On the present 

 material it differs in the smaller, ob.scure, pycnidial orifices, 

 not radially elongated, and in the more regular flask-shaped 

 pycnidia. 



Distribution. — Japan, in Herb. Berlin, Herb. Peradenij^a, and 

 Herb. Sapporo. 



Figures. — Plate 3, fig. 36, specimen ex Herb. Sydow, x 10 : 

 Plate 5, fig. 47, section, x 10. 



Aschersonia taitensis Mont., Ann. Sc Nat., Ser. 3, Vol. X. 

 (1848), p. 122. — Stromata discoid, up to 1 mm. diameter and 

 0'4 mm. high, minutely tomentose, without any evident 

 hypothallus ; pale yellow, with circular, or linear and curved, 

 yellow-brown masses of spores. Pycnidia ovoid, crowded, 

 irregularly circular or oval in section, sometimes convoluted 

 at the base ; pycnospores fusoid, ends pointed but not 

 produced, 10-14 x 1*5-2 \^\ paraphyses up to 70 \i. 

 long. 



