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1. scabies, B . {no. 489). On potatoes.
2. Trientalis, B. and B r. On leaves of T. Europaa.
O r d e r 1G. Æ01DIAGEI.
Peridium distinctly cellular.
170. RCESTELIA, Rcb.
Peridium elongated, the component cells at length separating
or lacerated.
1. cancellata, M . On pear-leaves.
2. cornuta, Tul; Grev. t. 180. On inountain-ash.
3. lacerata, Tul. ; Grev. t. 209. On liawtliorn.
171. PEBIDERMIUM, Chev.
Peridium elongated, at length ruptured irregularly.
1. Pini, Ohev.; Grev. t. 1. On Scotch fir.
2. elatinnm, Tul. On silver fir, altering both the foliage aud ramification.
172. JECIDIUM, P.
Peridium rarely elongated, opening by radiating reflected
teeth, or very short and bursting irregularly. Spores concatenate.
1. Allii, Grev. On A. ursinum.
2. Ari, B. On A. maculatwm,.
3. rubellum, P. On docks.
4. Primulæ, PC. On primrose.
5. Soldanella;, llornsc. On Soldanella alpha.
6. Pedicularis, Lohoschutz {no. 254). On
7. Menthæ, PC. On mints.
8. Asporifolii, P. {no. 255). On Boracjinea.
9. Tragopogonis, P. On goatsbeard.
10. Compositamm, Mart. On daisy, etc.
11. Valcriauacearum, Puh. On V. officinalis.
12. Periclymeni, PC. On woodbine.
13. Bunii, PC. On cai-thniit.
14. Galii, P. {no. 490). On Galium verum.
15. Eanmiculacearum, PC. On buttercups.
16. Calthm, Grev. On C. palustris.
17. leucospermum, PC. On wood anemone.
18. quadrilidum, PC. On garden anemone.
19. Thalictri, Grev. t. 4. On T. alpinum.
20. Geranii, PC. On Gerania.
21. Berberidis, P.; Grev. t. 97. On berberry.
22. Yiolm, Schum. On violets.
23. Behenis, PC. On Silene hjlata.
24. albescens, Grev. Ou Adoxa moschatellina.
25. Epilobii, PP. On E. montanum, etc.
26. Grossularire, PG.; Grev. t. 62. On gooseberry.
27. crassuin, P. On buckthorn.
28. Orobi, PG. On Orobus tuberosus.
29. Buphorbi®, P. On spurge.
30. Urticas, PC. On nettles.
173. ENDOPHYLLUM, Iffv.
Peridium enclosed in the leaf, bursting irregularly.
1. Sempervivi, Lev. («o. 476). On houseleek.
Fam. IV.—h y p h o m y c e t e s .
Filamentous. Fertile threads naked, for the most part
free, especially ahove, or loosely compacted, simple or
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