POLYPODIUM. 
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8. Polypodium vulgare attenuatum. The fronds elon- 
gated, the pinnae long and very narrow, placed alternately 
on the rachis, and at a considerable distance from each 
other, and sprinkled in the upper part by large sorb 
Introduced by Mr. Wollaston, of Chiselhurst. 
9. Polypodium vulgare biftdo -lob alum. A Somerset- 
shire variety, resembling the last in the forked character 
of the pinnae, but with the additional characteristic of 
an ear on the anterior base of the lower ones. 
10. Polypodium vulgare coriaceo -bifid urn. A very 
peculiar variety, of leathery texture, erect habit, and 
dwarf statures. Like its neighbours, its lower lobes are 
bifid, and the margin often slightly jagged. The sori 
are very large, and situated so near together as to be 
almost confluent, and from the erect habit of the fern 
the plentiful yellow fruit is much exposed, giving a 
golden appearance to the fronds. The plant described 
by Mr. Lowe grew on a wall near Malton. 
11. Poly podium vulgare crenatum . A Welsh and 
Irish variety, in strong contrast to the last described. 
Here the fronds are tall, broad, and of thin herbaceous 
texture, and the margins slightly notched. It would be 
a favourite variety only that its permanence is not to be 
relied on. 
12. Poly podium vulgare crist alum. The pinnse adorned 
by much divided points. 
13. Polypodium vulgare dentatum. The pinnae narrow 
and pointed, but with the additional peculiarity of being 
deeply toothed. 
14 Poly podium vulgare denticulatum . Broad fronds, 
margins jagged, whole appearance creepy. 
15. Poly podium vulgare interruplum . Curious from 
the varying length of the pinnse, which look as if some of 
i 
