THE BRITISH FERNS. 
some fronds the upper pinnz are partially depauperated. It was found near 
Nettlecombe by Mr. Elworthy. 
27.* acuminatum (M.). An elegant dwarf form, with attenuately pointed fronds 
and pinne, and small narrow acute pinnules which are very finely serrated. 
It was found by Mr. Elworthy near Nettlecombe. 
28.* arctatum (M.). A fine large form resembling lineare (28), but less abnormal in its. 
development, the pinnules being tolerably uniform, very rarely depauperated, 
and the apices of the pinne not being confluent into a long linear lobe but 
diminishing in the usual manner. The pinnules are narrow, almost linear, 
acute, with a very large acute anterior auricle; while towards the base of the 
frond they are a little more oblong, but even then narrow. It was found at 
Barnstaple by Mr. C. Jackson. 
30. dubium (Woll.). Lancashire: Preston, A. Stansfield. Yorkshire: Whitby, W. 
Willison. Devonshire : Barnstaple, C. Jackson. 
31.* plumoso-gracile (M.). A very elegant variety of thin papery texture, interme- 
diate between plumosum (31) and gracile (27), having some of its pinnules 
oblong more or less lobed and ineisely toothed, and some of them, here and 
there, narrower and having deeper and more evidently linear sharp-pointed 
teeth. It was found near Nettlecombe by Mr. Elworthy. 
35.* oxyphyllum (M.). A fine and elegant form having the light and plumy cha- 
racter of plumosum (31), and the narrowish acute form of pinnule belonging 
to acutum (5), while the pinnules themselves are deeply pinnatifid in the 
distantly-lobed attenuate manner which is seen in proliferum (36), to which 
on the whole it has most affinity. It was found near Nettlecombe by Mr. 
Elworthy. 
36.* proliferum Wollastoni (M.). See voli. p. 156. 
36.** proliferum Footii (M.). A remarkably fine form, closely allied to proliferum 
but differing in the more crowded segments and less attenuated apex of the 
pinnules, which together give a more dense appearance to the fronds. Itisa 
large form, with broad fronds, and abundantly proliferous on the main rachis. 
The plant was found in the county of Clare by Mr. F. J. Foot, and has been 
“sent to us by Dr. Kinahan. 
41.* Olaphamii (M.). A remarkably handsome form, which appears to have a per- 
manent character. The fronds are large and somewhat lax, with distant 
pinnæ and pinnules, the latter having in a general way the character of a 
deeply-lobed acutum (5) ; that is they are somewhat broadiy wedge-shaped 
and stipitate at the base, narrowish above, acute, with a large acute auricle, 
and smaller acute lobes. In this form, however, both the main and secondary 
rachides are multifid ; the former being forked some inches from the top, the 
branches forking again two or three times producing a flat tufted head of 
acuminate divisions, which are throughout clothed with pinnules like the 
other parts of the frond ; and the latter becoming forked once or twice at about 
an inch from the end. It is a charming variety, and was found near Whitby 
in Yorkshire by Mr. Thompson of Darlington, under the direction of Mr. 
Clapham, to whom and to Mr. C. Monkman we are indebted for specimens. 
Some of the plants found in the same locality are only multifid at the apex 
of the frond. The acute form of multifidum from Upcott, (vol. i., p. 158), 
appears to belong to this variety. 
Lastrea Thelypteris (i. 168). 
Severn.- Staffordshire : two miles north of Madeley, G. Maw. 

