THE COMMON POLYPODY. 57 
POLYPODIUM VULGARE v. SERRATUM, Herb. Mus. Brit. 
PoLYPODIUM VULGARE v. CAMBRICUM, Smith, Eng. Fl., 2 ed., iv. 268 (in part). 
Mettenius, Fil. Hort. Lips. 31 (excl. syn.) 
Var. cambricum; fronds barren, bipinnatifid throughout ; lobes 
narrowed below, broader and pinnatifid in the middle; lobules 
crowded, linear, or linear-lanceolate, acuminate, serrate. [Plate VI. | 
PoLYPODIUM VULGARE v. CAMBRICUM, Willdenow, Sp. Plant. v. 173. Bolton, 
Fil. Brit. t. 2, f£. 5a. Smith, Eng. Fl. 2 ed. iv. 268 (in part). Moore, 
Handb. Brit. Ferns, 3 ed. 50; Id., Ferns of Gt. Brit. and Ireland, Nature- 
Printed, t. 3 A. 
POLYPODIUM CAMBRICUM, Linneus, Sp. Plant. 1546. 
PoLYPODIUM LACINIATUM, Lamarck, Fl. Fran. i. 14. 
POLYPODIUM CAMBRICUM, B. CRISPUM, Desvaux, Berlin Magazine, v. 315 ; Id., 
Ann. Soc. Linn. de Paris, vi. 233. 
Var. omnilacerum; fronds bipinnatifid throughout, sparingly 
fertile; lobes not narrowed below, but pinnatifid throughout, the 
lobules distinct, pyramidal, serrate. [Plate VII]: 
POLYPODIUM VULGARE, v. OMNILACERUM, Moore, Handb. Brit. Ferns, 3 ed., 
55; Id., Pop. Hist. Brit. Ferns, 2 ed. 66, 337. 

Rhizome creeping, tortuous, branched, as thick as a swan's quill 
or one's little finger, densely clothed with ferruginous scales on a 
-deciduous cuticle, the fibrous roots produced chiefly from the under 
side. Scales lanceolate or ovate, very much acuminated, crowded, 
sometimes peltately attached, at length deciduous, leaving the surface 
of the rhizome smooth and greenish. Fibres brown, tomentose, 
densely matted over the surface to which the rhizome is fixed. 
Vernation circinate. 
Stipes naked, variable in length, often nearly or quite as long as 
the frond, sometimes much shorter, and as well as the rachis slightly 
grooved in front; at the base articulated with the rhizome. 
Fronds from two to eighteen inches long, lateral to the rhizome, 
subcoriaceous, of a somewhat sombre green, paler beneath ; often 
triangular-ovate in outline when small, varying to ovate-oblong and 
linear-oblong, the latter being the form assumed by the fully deve- 
loped condition of the species in its normal state; very deeply 

