SUB-SECTION LASTREA. 
147 
Section 0 . ALPINUM. 
(Distinguished by its dwarf and more slender fronds.) 
1. alpinum, Moore. Found by Mr. Clowes, at Haweswater, and 
on Ben Lavvers, by Mr. P. N. Fraser and myself. A small, delicate 
form. 
2. Aireyi, Lowe (interrupta Aireyi, Barnes). Found in 1876, in 
Patterdale, by Mr. T. Airey. Evenly interrupted. 
3. angustipinnulum, Moore. Found in Lancashire, by Mr. R. 
Morris ; and in Yorkshire, by Mr. W. Willison. A depauperate 
yet symmetrical form, with very narrow pinnules. 
4. anomalum, Lowe. Found in Yorkshire, by the late Mr. 
Clapham. A dw^arf depauperate variety. 
5. Barnesii, Lowe (interrupto-Barnesii, Lowe). Found in 1865, at 
Witherslack, by Mr. J. M. Barnes. Defective ; pinnules reduced. 
*6. calomelanos, Lowe. Found in 1867, by myself, on Ben 
Lawers. More finely divided than lepidotum. Length, 10 inches. 
7. contractum, Lowe (alpinum-contractum, Moore). Found in 
1864, at Mardale, by Mr. J. M. Barnes. Depauperate, with re- 
duced pinnae and pinnules. 
8. Crouchii, Lowe (interrupta Crouchii, Barnes). Found in 
1864, at Loughrigg, by Mr. W. Crouch. Defective, with reduced 
pinnules. 
9. dumetorum, Moore. Found in a number of places. Dwarf 
broad fronds, with a glandular surface. Length, 12 inches. 
*10. ebeneum, Lowe. Raised by myself, in 1862. Dwarf. Stem 
ebeneous. 
*11. Fraseri, Lowe. Found in 1867, on Ben Lawers, by myself. 
Dwarf and crisp. 
12. grandidens, Lowe (interrupto-grandidens, Clapham). Found 
in 1873, in Yorkshire, by the late Mr. Clapham. Dwarf; inter- 
rupted ; half of the pinnules minute. 
13. Howardii, Monkman (cruciata pinnula, Fox). Found in 1863, 
in Ray Wood, Castle Howard, by Mr. J. Greenwood, and soon after 
by Mr. Monkman and Mr. Stabler (six plants were found in this 
wood. A remarkable fern with cruciate pinnules. 
14. hymenophylloides,Z 07 £/£. Found at Ilfracombe by Mr. Dadds. 
A very Filmy-fern-looking variety. 9x2^ inches. Stiff and erect in 
growth. 
15. irregular e, Moore. Found in 1862 at Witherslack, by Mr.J.M. 
Barnes ; an irregular form. 
16. lepidotum, Moore. History obscure. A much-divided, dis- 
tinct, elegant form. 
*17. ornamentum, Lowe. Found in 1867, on Ben Lawers, by 
myself. A slender dwarf variety with twisted pinnules. 
18. plumosum, Jones. Found on Ben Nevis. A very beautiful 
plumose form. 
19. pumilum, Moore. Dwarf, not uncommon. 
20. ramoso-cristatum,Zar;^. Raised in 1874 by Mr. J. M. Barnes. 
Branching at the base and again in the middle (below the pinnae), 
