148 BRITISH FERNS. — SUB-ORDER II. TRIBES IO AND II. 
ending in large capitate, closely-crested heads. Length, 15 
inches. 
21. ramosum, Moore. History obscure. Dwarf, twin-fronded, 
and again dividing. 
*22. spectabile, Lowe. Found in 1S67, on Ben Lawers, by myself. 
A lepidotum-looking variety with much attenuated fronds. Length, 
12 inches. 
*23. spectabile-ramosum, Lowe ,f found in 1867, on Ben Lawers, 
by myself. Like spectabile, with the apex forked. 
Section 7. DILATATUM. 
The large-growing form. Exceedingly common, and requiring but 
little care in its cultivation. Where there is an abundance of half- 
decayed leaves, it grows to a great size. Fronds spreading and ovate 
lanceolate in form, biprnnate and even tripinnate. Basal pinnae 
obliquely triangular ; pinnules very dentate. Usually erect, with a 
long densely scaly stem. Length, from 1 to 6 feet. 
1. Bootii, Birkenhead. A North American variety. Length, 
i\ feet. 
2. Chanterae, Moore. Found in Devon by Mrs. and the Rev. 
J. M. Chanter. Pinnae distant ; pinnules blunt ; frond oblong 
lanceolate ; apex attenuated. Length, 2 feet. 
3. Clovellyanum, Lowe (cristatum Druery, Druery). Found in 
1888, at Clovelly ; neatly crested. 
4. crispato-cristatum, Jones (cristata Oscroft, Wollaston ). Found 
in 1873, near Bristol, by Mr. J. Oscroft. Pinnae minutely crested ; 
rachis dividing and subdividing into a foliose, crisped, and 
crested head, 9 inches or more across. Length, 2 feet. 
5. crispum, Wollaston. Said to be a good crisp form. 
6. cristato-gracile, Jones (cristata Roberts, Wollaston). Found 
in 1870, in Carnarvon, by Mr. Roberts. Pinnae narrow ; pinnules 
small ; better crested than any other variety. Length, 19 inches. 
7. cristatum, Moore. Found near Doncaster by Mr. S. Appleby, 
and a more marked form in Yorkshire, by Miss Wright. Pinnae 
twice forked. 
8. Drueryi, Z0«/£(stipitato-lacerata, Druery'). Found in 1884, at 
Campsil, by Mr. C. T. Druery. An interesting depauperate form. 
6xi| inches. 
9. folioso-cristatum. A vigorous, handsome, foliose form, found 
in the Azores. Fronds and pinnae heavily crested. 
10. folioso-digitatum. Also found in the Azores. A fine variety. 
Fronds heavily polydactylously crested. 
11. grandiceps, Barnes. Raised by Mr. J. M. Barnes. A grand 
variety, very heavily crested. 
12. hybridum, Stansjicld. Accidental seedling. Came up on the 
bole of another hybrid, i.e. remotum (a cross between Nephrodium 
spinulosum and N. Filix-mas). 
Nos. 11, 17, 20 and 21 were all found on Ben Lawers, beneath one heap of stones. 
