HYPOCRELLA AND ASCHERSONIA. 247 



In the Peradeniya specimens there does not appear to be any 

 doubt that the peculiarities of the stromata are due to the growth 

 of the Cladosporium. The greenish -yellow specimens from 

 Sigiriya are identical with these, but the purple forms from the 

 same trees are so different that it might be suggested that either 

 the parasite was a different species, or that the Aschersonia on 

 which it grows was not A. placenta. On the latter point there 

 is only the evidence that all the other specimens from the same 

 trees are A. placenta, but this does not count for much, as it is 

 not uncommon to find two or more species occurring together. 

 But whatever the host, the condition of the contents of the 

 pycnidia indicate that the specimens are parasitized. Similar 

 conditions have been observed in old specimens of Aschersonia 

 marginata and A. sclerotioides, overrun by Meliola, and in Ascher- 

 sonia hasicystis. 



Faweett has described a Cladosporium parasitic on Aschersonia 

 Ooldiana, but he does not note any change in the character of the 

 stroma. 



Distribution. — Ceylon, in Herb. Kew, Herb. Paris, and Herb. 

 Peradeniya {Aschersonia placenta). Hypocrella stage, in Herb. 

 Peradeniya. India (^.sc^ersoma stage) in Herb. Pusa. Singapore, 

 in Herb. Kew. Java, in Herb. Raciborski {Barya salaccensis) , 

 Herb. Penzig {Aschersonia javanica), and Herb. Berlin {Aschersonia 

 lecanioides). New Guinea, in Herb. Berlin {Aschersonia novo- 

 guineensis). Philippines, in Herb. Peradeniya. Africa, in Herb. 

 Bei'lin {Hypocrella Warneckiana). 



Figures. — Plate 3, fig. 39, Hypocrella- Aschersonia, Philippine 

 specimen, X 8 ; Plate 5, fig. 39, Hypocrella, section, x 6 ; Plate 

 3, fig. 25, pulvinate Aschersonia, Ceylon, x 7 ; Plate 3, fig. 48, 

 parasitized Aschersonia, Ceylon, x 10 ; Plate 3, fig. 52, two 

 confluent specimens, typical Aschersonia placenta, colovir of 

 stroma faded, Ceylon, x 10 ; Plate 5, fig. 43, section, x 10 ; 

 Plate 5, fig. 56, formation of part-spores, x 800; Plate 5, fig. 59, 

 part-spores, x 900. 



Hypocrella Andropogonis (P. Henn.) Fetch. — Pycnidial 

 stroma usually oval in plan, irregularly pulvinate, up to 6 mm. 

 long, 4 mm. broad, and 1 • 5 mm. thick ; white, minutely 

 tomentose ; margin spreading, stromata often confluent ; 

 pycnidial orifices circular or irregular, scattered ; pycnidia 

 tubular or irregularly oval, widely open, spore masses greenish- 

 yellow, not fusing; pycnospores fusoid, 10-14 x l'5-2 \x; 

 paraphyses up to 140 \). long. Perithecia developed in the 

 stroma between the pycnidia, scattered, flask-shaped, up to 

 0-4 mm. deep, 0-2 mm. diameter ; ostiola yellow-brown, not 

 projecting ; asci 4-8-spored ; part-spores cylindric, ends 

 6(9)21 (33) 



