78 
BRITISH SPH^RIACEI. 
Hypocrea pulchra ( Hypocreopsis Pulchra. Winti) Grevillea iv., 
123. Plow. S.B. ii., No. 100. On sheep dung. 
The genus Hypocreopsis is supposed to differ from Hypocrea in 
having a tomentose surface to the stroma, but this is not an un- 
common feature in many species of exotic Hypocrea , and is at best 
only a sectional distinction, or sub-generic. Old specimens become 
quite smooth, in which case the generic distinction would be lost, 
and hence confusion would ensue. 
Gen. 5. HYPOMYCES. Tul— Handbk., p. 776. 
Gen. 6. OOMYCES. B. $ Br.— Handbk., p. 776. 
Gen. 7. ACROSPERMUM. Tode.— Handbk., pp. 430. 
The long filiform sporidia are contained in asci, and, therefore, 
this genus is allied to Oomyces. 
Acrospermuxn compressum. Tode.— Hdbk., No. 1,257. On 
nettle stems, &c. 
Acrospermum graminum. Lib. — Hdbk., No. 1,258. On dead 
grasses. 
Gen. 8. NECTRIA. Fr.— Handbk., p. 780. 
Sub-genus I. TUBERCURELLA. C. Perithecia caespitose, on an 
erumpent stroma, often at first some species of Tubtrcularia. Nos. 
2,345 to 2,353. 
Nectria citrino-aurantia. Desm.— Berk & Br. Ann. Nat. His. 
No. 1,493. On willow. 
Nectria mammoidea. Ph.Sc PI . — Grevillea iii., p. 126. Plow. 
S.B., ii. No. 5. On furze. 
Hub-gemis II. BYSSONECTRIA. — Perithecia seated on a more 
or less distinct subiculum. Handbook, No. 2,355, 2,364. 
Sub-genus III TRICHONeotria . — Perithecia villose, or tomen- 
tose. Handbk., Nos. 2,354, 2,356, 2,357, 2,369. 
Sub-genus IY. GENUINA.— Perithecia naked, superficial, scat- 
tered, or gregarious. Handbk., No. 2,358 to 2,368, 2,370. 
Nectria Keithii. Berk <$f Br. — Ann. Nat. Hist. No. 1,625. On 
cabbage stalks. 
Nectria Plowrightiana. Sacc. in Michelia. — Plow. S.B. iii., No. 
15. On stems of Arctium lappa. 
Nectria lecanodes. Ces. — Grevillea vi., p. 25. Plow. S.B. 
ii., No. 12. On Peltigera. 
Nectria peltigerse. Ph. fy Pi.— Grevillea vi., p. 123. Plow. S.B. 
ii., No. 13. ( [=Nectriella carnea. Fckl.) On Peltigera. 
Sub-genus V. CRYPTONECTRlA. — Perithecia at first covered, 
then erumpent. 
