133 
The clusters of spores frequently extend outward beyond 
this inner line and the spores taken from the outer part 
produce curious varieties. Axminster, Charmouth, Lyme, 
Seaton, and Wootton. 
MARGINED HARTSTONGUE. 
37. Partly-margined Hartstongue. Bub-mar ginatum. In 
this plant the under surface of the frond only here and 
there has the inner line ; the fronds are generally of the usual 
size and form, though the margins are so jagged, or notched, 
that the practised eye of a passer-by can perceive it to be a 
variety. Sometimes the clusters of spores are on the upper 
surface of the leaf. Axminster, Chard, Colyton, Combpyne, 
Kilmington, Seaton, Stockland. 
38. Turgid Hartstongue. Turgidum, W. This is so 
called from the thick or muddy appearance of the cellular 
tissue between the veins. The frond is leathery, lobed, 
notched, or toothed, one and a half or two inches broad, 
having more or less a line on the under surface. The head 
is sometimes forked : the base heart-shaped. M. Chard- 
stock, at Tytherleigh. 
39. Horned Hartstongue. Cornutum, M. The fronds 
are Irom six to ten inches long, slightly waved, abruptly 
rounded at the summit, and having the mid-rib running out 
on the under surface into a horn, as represented in woodcut. 
Page 130. The margins are deeply lobed and the lobes 
minutely toothed. Chard, near Wadeford, Chardstock, 
Hawkchurch, Seaton. 
