CRYPTOGAMIA. FILICES. Polypodium. 997 
round, deep brown tuberculated. Hook. Readily distinguished from 
its affinity to P.jilix-mas by its yellow green hue, and broad pinnae. E.) 
(Crested Polypody. P. cristatum. Linn. Aspidium cristatum. Sw. Sm. 
Willd. Hook. This very rare plant was discovered in boggy parts of the 
heath between Holt and Hempstead, Norfolk, by the Rev. R. B. Francis; 
also among alder bushes in bogs at Westleton, Suffolk, by D. E. Davy, 
Esq. F.L.S. P. Aug. FI. Lond. 
We suspect that Mr. Brown’s specimens in With. Herbar. from Ben 
Bourde in Aberdeenshire ought rather to be considered this species than 
P. dilatatum. E.) 
P. denta'tum. Leafits opposite, wing-cleft: lobes sparingly cut at 
the sides, finely toothed at the ends: stem very slender. 
Dicks. H. S. — (E. Bot. 1588. E.)— Dicks. Fasc. iii. 7. 1. 
Nearly resembles P. fragile in size and habit. Root small, fibrous, bun¬ 
dled, a little wooliy. Stems several, slender pale brown, shining, some¬ 
what scaly at the base. Leaf spear-shaped, doubly winged. Wings 
distant, spear-shaped, mostly alternate. Leafits egg-shaped, blunt, cut, 
unequally toothed ; teeth distant, blunt, pale brown. Clusters of capsules 
near the incisions, towards the edge. Dicks. 
Such is the account given by Mr. Dickson of this new species of Polypodium, 
which he first discovered in clefts of rocks in the Highlands of Scotland ; 
but, though this description and his specific character mention it being 
doubly winged, neither his own figure, nor the specimens sent out in 
his Fasciculi of dried plants, authorize us to say that they are so. They 
are only simply winged, and the wings divided into lobes, nor have they 
any proper mid-rib. P. dentatum of Forsk. in Gmelin’s Syst. Nat. is a 
different plant. 
(Toothed Polypody. Welsh: Fiol-redynen ddeintiawg. P. dentatum. 
Dicks. Hull. Aspidium dentatum. Sw. Willd. Hook. Cyathea dentata. 
Sm. On rocks between Widdy Bank and Caldron Snout, Durham. 
Rev. J. Harriman, in Winch Guide. On rocks north of the mansion 
of Trejorwerth, Anglesey. Welsh Bot. E.) 
P. fonta'num. Leafits alternate, triangular, blunt, deeply wing-cleft: 
lobes sharply toothed at the end: stem very slender. 
(E. Bot. 2024. E.)— Lob. Adv. 361. 2, and Ic. i. 810. 1— Bolt. 21— Barr. 
432. 1— Pluk. 89. 2 and S—Ger. 980. 2. 
Its habit resembling P. fragile, but the leafits closer together and not so 
deeply lobed. Fructifications in large dots, proceeding not from a round¬ 
ish scale, but from an oblong white slender valve or chink. Linn. Plant 
three or four inches high. Stamens pale green, thread-like. Leafits 
alternate. Bolt. 
(Slender-stemmed Polypody. Aspidium fontanum. Sw. Willd. Asple-* 
nium fontanum. Sm. Old walls and rocks. Rocky places near Wy- 
bourn, Westmoreland: also in Buckinghamshire. Bolt. 
P. June—Sept. 
(4) Leaves doubly winged. 
P. aculea'tum. Primary wings crescent-shaped: leafits rhomboidal, 
with prickly teeth : stem chaffy. 
Mill. III.- — Bolt. 26. 1 and 3— H. Ox. xiv. 3. 15, f 1 —Pluk. 179. 6, a young 
plant only winged. — Pluk. 180. 1, fully grown. — Pluk. 180. 3, in its middle 
state of growth. —(2?. Bot. 1562, margin of the pinnule incorrecU E.) 
