92 
BRITISH FERNS. — SUB-ORDER II. TRIBE 9. 
even rugose. A twisted rugose head, composed of narrow, long 
branches. Stipes 6 inches long. 
16. lobatum, Lowe (muricato-lobatum, Barnes). Found in 1871, 
near Gleeston, by Mrs. Hodgson. Lobate as well as muricate. 
17. marginatum, Lowe (rugoso-marginatum, Wollaston). Found 
in 1862, in Levens Park, by Mr. J. M. Barnes. Rough and under- 
lined. 
18. mixtum, Lowe. Raised by myself. 12 Xi inches. Muri- 
cate, undulate, and capitate. 
19. muricatum, Moore. Found in Guernsey by the late Mr. 
James, at Nettlecombe by the late Mr. Elworthy, and at Farleton 
Knot by Mr. J. J. Jones. Muricate on the upper surface. 
20. nodosum, Barnes. Found in 1866, at Brigstear, by Mr. J. 
M. Barnes. Frond kneed. 
21. nupta, Lowe. Raised by myself. i2Xof inches. Fronds 
convex ; branching at the top of the stipes. Coarsely rough. 
22. peraferens, Lowe (rugoso-peraferens, Jones). A distinct 
rugose peraferens. 
23. prominens, Lowe. Raised by myself. Undulate and 
spirally twisted. The prominences (which are very stiff) are rugose 
at the base, and are half an inch long. 5 X inches. 
24. ramosum, Lowe (ramoso-rugosum, Jones). Rugose and 
branched. 
25. revolutum, Lowe. Raised by myself, ioxof inches. A 
tasselled rugose variety, with large, round, basal lobes. Fronds 
revolving. 
*26. Rickettsae, Lowe. Raised by myself. 25 X2j inches. Broad, 
and very rugose. 
27. rugoso-capitatum, Lowe. Raised by myself. A good capi- 
tate rugosum. 
28. rugoso-spirale, Lowe. Raised by myself. Stout, rugose, 
spirally twisted. 
*29. scalpturato-latum, Lowe. Found near Scarborough by 
myself. 23 X 3J- inches. Shining ; but widely rugose ; margin 
dentate-lobate. 
30. scalpturatum, Moore. Found in Guernsey by the late Mr. 
James, at Nettlecombe by the late Mr. Elworthy, in the Isle of 
Wight by Mr. Bloxam, and near Dalton by Mrs. Hodgson. 
12X ij inches. Irregularly ridgy and crenate lobed. 
*31. spirale, Lo%ue (muricato-spirale, Jones). A spiral muricatum. 
32. striatum, Lowe (muricato-striatum, Moore). 13x1^ inches, 
of which the stipes is 6 inches. Regularly roughly striate. 
33. superbum, Lowe (muricato-superbum, Lowe). Raised by 
myself. 16x2 inches. A very bold muricate form. 
34. tridentiferum, Lowe. Raised by myself. 7Xof inches. 
Very rugose ; margin dentate. Apex trident-shaped. 
35. undulatum, Lowe (undulato-muricatum, Lowe). Raised by 
myself. 15x1^ inches. A fine, very rugose form, with a bold 
smooth costa. 
