320 
1.—Prosthemium betulinum ze, on dead birch twigs, Spye 
Park. Probably a stylosporous form of Massaria siparia 
Band Br. 
2.—Prosthemium stellare Riess, on alder twigs, Spye Park. Riess 
in Bot. Zeitung, 1853, p. 130, t 3, figures 28—31. Band 
Br., A. N. H., No. 939. The only two species. 
GENUS 125. ASTEROMA. De.* 
Perithecia flat, with no determinate orifice, attached to creep- 
ing, branched threads. Spores simple or uniseptate. 
1.—Asteroma rose De., on living rose leaves ; very common. JZ., 
A. N. H., No. 202, t 11, figure 5. The only species observed 
here out of 6 British. 
GENUS 126. RABENHORSTIA. “f'r.t 
Conceptacle thin, subcarbonaceous, cup-shaped, dimidiate, above 
covered by the adnate cuticle, celluloso—lacunose within. 
Ostiolum simple, nucleus gelatinous. 
Neither of two British species have yet occurred in our district. 
GENUS 127. cyTISPoRA. Fri 
Perithecia irregular, or compound and radiating. Spores 
minute, mostly curved, oozing out from a common apex in the 
form of globules or tendrils. 
Cytispora rubescens F’., on twigs of roses, Batheaston. 
Other forms occur, but they have not been named as from their 
connection with spherie, probably none are autonomous. 
Tulasne considers this in part a spermatiiferous state of Valsa 
leucostoma, carpologia, p. 185. 
* Asteroma, from aster, a star. 
+ Rabenhorstia, named in honour of Dr. L. Rabenhorst, the eminent 
cryptogamic botanist of Dresden. 
t Cytispora, from kutos, a sinuous cavity, and sporos a seed. 
