46 • 
A MONOGRAPH OF THE BRITISH HYPOMYCES. 
are clearly H. aurantivs ; but H. aurantius was never known by me 
to occur upon a Russula. In the Edinburgh Herbarium, there is a 
specimen upon some Agaric which looks very like H. torminosus. 
Plate 150 bis. a. Hypomyces. Nat. size. 
b. Perithecia X 15. 
c. Perithecium X 60. 
d. Conidia X 400. 
e. Asci and sporidia X 400. 
/. Free sporidia X 800. 
8. Hypomyces Tulasneanus. Plow. Conidia hyaline, oval, 
smooth, borne singly on the end of branches of the mycelium ; 
•OC^-’OlSmm. long by -005-*006 mm. wide. 
Chlamydospores large, yellow, narrowly oval, with an attenu- 
ated apex, attached at the base to the dilated extremity of a hyaline 
mycelial tube ; ‘016-'02 mm. long by *01 mm. wide. 
Perithecia small, ovato-globose, with a rather obtuse ostiola, 
which emerge from a dirty, yellowish green, thin subiculum ; 0*25 
mm. long by ’02 wide. 
Asci elongate, cylindrical, , 12- , 15 mm. long by ‘01 mm. wide. 
Sporidia eight, hyaline, lanceolate, usually simple, ’02- *025 mm. 
long by *008 mm. wide. 
Hypomyces luteo-virens. Tul. Sel. Fung. Carp, in., p. 57, 
t. 8, f. 15-16. 
,, „ Cooke Hdbk., p. 778. 
Sphaeria luteo-virens. Fries Sys. Myc. n. , p. 339, in part. 
Hypocrea luteo-virens. Fr. Sum. Yeg. Sc., p. 383, in part. 
„ „ Berk. & Broome Ann. N. H., No. 594. 
„ „ Currey Linn. Trans, xxn., t. 46, f. 53. 
On Boletus, Laxton, M. J. B. On Boletus. Mattishall. Sep., 
1880, C. B. P. 
This species is quite distinct from H. luteo-virens of Fries. It 
is much less brightly coloured, has very distinct chlamydospores, 
and affects Boleti. 
Plate 152. 1. a. Boletus infested with the Hypomyces. Nat. size. 
b. Perithecium x 20. 
c. Perithecia x 140. 
d. Chlamydospores X 400. 
e. Asci and sporidia X 400. 
f. Sporidia X 800. 
9. Hypomyces luteo-virens, Fries. Conidia oval, hyaline, 
born on the tips of hyaline, verticillate, trivaricately branched 
tubes. Stroma, a widely effused, thin tomentum, at first bright 
egg-yellow, becoming greenish, then almost black. 
Perithecia minute, crowded, ovoid or spherical with a conical 
apex. Emergent, pallid, the free portion becoming brown or 
nearly black ; -38 mm. high, *3 mm. wide. 
Asci cylindrical, *16 mm. long by *007 to *008 mm. wide. 
Sporidia eight, uniseriate, elongato-elliptic, acute, straight, 
mucronate at either end, greenish or yellowish, hyaline, simple, 
•628 to *03 mm. long by ’005 to *006 mm. wide. 
