POLYSTICHUM. — CYSTOI'TEIUS. 
527 
stalked, but very ditferently from those of P. aninilare. — A. 
lobatuin (Sw.) has the pinua; less divided than in the type of 
the species and the fronds linear-lanceolate and more rigid. 
H. F. 10.— Hedge-banks. P. VII. VIII. E. S. I. 
3. F. angiddre (Presl) ; fronds lax drooping lanceolate bi- 
pinnate, jnnnides truncate or obtuse-angled below distinctly 
stalked. N. 173. H. F. 12. — Stipe usually long. First upper 
pinnule scarcely longer than the others, its lower side rounded 
below, its upper with a large bluntish auricle and forming an 
obtuse angle with the lower, at the top of the short stalk 
which is nearh^ at right angles with the partial rachis ; all 
short, broad and bluntish : or first upper pinnule longer and 
deeply pinnatifid, all more acute ; or pinnules all narrower 
and acute. — Sheltered woods and hedge-banks, chiefly in the 
1. C. Jrag'ilis (Bernh.) ; frond lanceolate bipinnate, pinnai 
ovate or ovate-lanceolate, pinnules oblong-ovate or cordate- 
ovate pinnatifid or cut. — a. vera ; usually bipinnate, pinnules 
rather narrowed below, veins ending at tip of term, teeth or if 
pinnule emarginate in the 2 teeth not in the notch. Sporules 
prickly. — a. C anthrisci folia (Roth) ; pinnules ovate acute 
cut, segments oblong toothed. Ci/sfea fragilis Sm., N. 155. — 
b. C. cynapifolia (Roth) ; pinnules obovate cut, segments 
obovate toothed or refuse at the end. C. f ragilis E. B. 1587. — 
c. C. angustata (Sm.) ; pinnules lanceolate acute cut, segments 
lanceolate-oblong cut, teeth acute. iV. 156. — ji. Cyathea 
dentata (Sm.) ; frond often only subbipinnate, pinnules 
broadest below blunt bluntly toothed, veins as in a. //. /'. 
23. iV. 154. C. fragilis Roth. Clusters more marginal., 
often ultimately confluent. In well-grown plants the pinnules 
are suddenly widened to their full extent just above their 
narrow stalklike base. Spores warted. — 7. C. Dickieana 
(Sim), pinnae usually overlapping, pinnules broad blunt, veins 
reaching the emarginate end, clusters scattered, spores verru- 
l ose. — 5, C. alpina (Desv.) : frond bipinnate, pinnae ovate, 
pinnules ovate deeply pinnatifid with broadly and shortly 
linear segments partly cloven, veins reaching the blunt end. 
F. B. 163. //. 24. Fronds much divided but compact and 
close. — I have placed these plants under one species with 
much doubt. — Rocks and walls. 7. In a damp cave by the 
sea near Aberdeen. 5. Teesdale. Mr ./. Backhouse 1 P. VII. 
West. P. VII. VIII. 
E. S. I. 
6. CYSTOP'TEPaS 
BernJi. Bladder-Fern. 
VIII. 
E. S. I. 
