THE COMMON HART'S-TONGUE FERN. 178 
ginate almost continuously, through the greater part of the frond, 
but near the margin and irregular. The fronds are upwards of a 
foot long, about an inch or rather more in width, cordate at the base, 
irregularly lobate and sinuous along the margins, and multifid with a 
tuft of numerous small dilated segments at the apex ; in the fertile 
portions the margin is also laciniate-toothed. It was found at Hack- 
ness near Scarborough by Mr. A. Clapham. 
Besides being itself of ormamental character, this variety is 
remarkable as having been the direet parent of the following 
marvellously distinct forms raised by Mr. Clapham from its spores :— 
marginato-cristatum (64), vivo-marginatum (66), ramo-proliferum 
(67), proliferum (68), ramo-submarginatum (153), and ramo-margi- 
natum (154). These seedling plants were very carefully reared, and 
Mr. Clapham informs us, that 58 of them, retained in his own collec- 
tion, yielded the following results :— 
S. proliferum 6 plants 
S. vivo-marginatum | 26 A fair proportion of these 
S. ramo-proliferum, two forms à? plants were proliferous; and ` 
S. marginato-cristatum, three forms 5 ,, where fertile, also supraso- 
S. ramo-marginatum, two forms OMS riferous. 
S. ramo-submarginatum 16) 5 
77. peraferum (Woll.). This variety is interesting chiefly on 
account of a curious pouch or pocket produced at the blunt apex of 
the frond. There are two plants having this peculiarity, a taller 
and a dwarfer one; the latter having fronds about six inches and 
the former about a foot long. The fronds are nearly or quite two 
inches broad, cordate at the base, somewhat undulated, here and there 
lobed or laciniate-toothed and at these parts submarginate; the apex 
is obtusely-rounded, somewhat lobate, the costa not reaching to the 
margin, but becoming developed in a leafy or marginate manner into 
a small pouch, this pouch like the membrane in marginatum being 
sometimes fertile. The costa is sometimes prolonged in the form of 
a horn through the marginate apical membrane which forms the 
pouch. It was found in Ireland by Dr. Allchin, and though occa- 
sionally bearing normal fronds, is a very fairly constant variety of 
curious rather than elegant aspect. 
78. rugosum (Allchin). A curious and distinct variety, with a 
remarkable smooth appearance. The stipes is often long (3-9 inches), 


