4 
2. Ceterach. 1. FILICES. 
PL end . cf. 
B. Polypodiace-ZE. Capsules nearly surrounded with 
an elastic ring which bends back when the capsule bursts ; 
Involucrum none, except the hairs which surround the 
capsules. 
II. 2. CETERACH. Er. Cordus. Miltwaste . 
Sori transverse, linear. — Root fibrous; frond cespitose, 
pinnatifid; lower surface covered with lanceolate, acute, 
serrulate, reticulate, brown, shining, membranous scales, 
which enclose the capsules. 
Ceterach officinarum . Shop miltwaste . 
Frond pinnatifid ; lobes confluent, obtuse, not notched, 
beneath paleo-squamose ; scales not notched. 
Ceterach officinarum, C. Bauhin , Pin. 354. 
Asplenium sive Ceterach, Rail Syn. 1 1 8 5 Ger.em. 1139. Park. 1046. 
A. Ceterach, Lin. S. P. 1538. 
A. sinuosum, Salisb , Pr. 403. 
Scolopendriutn Ceterach, Sym. Syn. 193. 
Blechnum squamosum, Stokes Bot. Mat. Med. 617. 
Gramnites Ceterach, Swartz Syn . Fit. 23. 
Spleenwort. 
Calcareous rocks and old walls ; perennial ; nearly all 
the year. 
Root black ; Frond cespitose, 4 — 8 in. high, spreading, 
lanceolate, lobes alternate, rarely opposite; smooth above; 
Capsules auburn. 
III. 8. POLYPODIUM. Theophrastus. Polypody . 
Sori round, in rows more or less distant from each other. — - 
Root creeping, torulose, scaly, fibres villose; frond pin- 
nately divided, sometimes naked, or furnished with simple 
hairs, and long, lanceolate, reticulate, membranaceous 
scales. 
1. Poly podium vulgar e» Common polypody , 
Frond deeply pinnatifid; lobes linear-lanceolate, crenu- 
late, approximate ; sori solitary ; rhizoma chafly. 
Polypodium, Raii Syn . 117, 1 ; Ger. em. 1132. 
Pol. vulgare, Park. 1039 ; Lin. S. P. 1544. 
Polypody of the oak. W allfern. Polypody. 
Trunks of old trees, walls; perennial; May to October. 
Frond 4 — 8 in. high, erect, lanceolate, acute; sori in 
two rows parallel to the ribs. 
Root sweetish, but grows bitter by long boiling; gently 
purgative when fresh. 5yj infused in 3§s of boiling water 
is sufficient for two doses. 
