136 FLORA OF TASMANIA. [ Filices. 
insertum, medio ven impositum. Vene furcate, simplices.—Rhizoma cespitosum v. repens; frondibus 
Jlaecidis, membranaceis, bi-tripinnatifidis. 
A small genus of Ferns, natives chiefly of temperate and subarctic regions, of remarkably flaccid texture. 
C. fragilis is found in very many parts of the globe, and is a very variable plant.— rond 3-6 inches high, lanceolate 
or oblong-lanceolate, pinnate or bipinnate. Rhizome shortly creeping, tufted. Stipes short, slender, brittle ; rachis 
winged above. Pinne irregularly inciso-lobate; upper decurrent. Sori scattered over the back of the pinnules, 
small, sometimes confluent.  Znvolucre white, membranous, attached below the sorus by a broad, convex, arching 
base, ovate, acuminate, at length reflexed. (Name from kvoros, a box, and mrepov, a wing.) 
‘1. Cystopteris fragilis (Bernhardi, Neu. Journ. Bot. ii. 27). 
Var. a. dentata ; frondibus bipinnatis, pinnis ovatis lanceolatisve, pinnulis obtusis rarius pinnatifidis. 
— Hook. Gen. et Sp. Fil. i. 198. C. dentata, Hook. Brit. Fl. ed. 5. p. 441. (Gunn, 2039.) 
Var. 8. Tasmanica; frondibus pinnatis, stipite brevi, pinnis late ovatis inciso-lobatis inferioribus 
pinnatifidis, soris paucis minutis.—C. Tasmanica, Hook. Gen. et Sp. Fil. i. 199. (Gunn, 32.) (Tas. 
CLXVI.) 
Has. Var. a. Mount Olympus and Lake St. Clair, on moist rocks, Gunn. Var. B. Tasmania, Gunn 
(no habitat). | 
DisrürB. Var. a. Europe, Arctic regions, North India, Abyssinia, North America, South Africa. 
Of the two varieties one accords precisely with the European dentata; the other differs in its less-divided 
frond, broader pinnules, and very small sori.—Pr4TE CLXVI. Fig. 1, portion of frond and sorus; 2, involucre :— 
both mugnified. 
Gen. VII. LINDSAA, Dry. 
Sori lineares, marginales v. intra-marginales, continui v. interrupti. Involuerum exterius liberum, e 
membranis 2 parallelis, superiore textura frondis, inferiore ex apicibus venarum (une v. plurim.) oriente. 
ene simplices v. anastomosantes.— Frondes (speciebus Tasmanicis) parvule, coriacee, pinnata. 
A large genus of chiefly tropical Ferns, the Tasmanian species of which are small, coriaceous, and glabrous, 
and simply pinnate or bipinnate, with erect, stipitate, tufted fronds, rising from a creeping rhizome.—Sori linear, 
running along the edge of the pinnules continuously or interruptedly, covered by an involucre formed of two parallel 
lamellz or plates opening outwards; of these the upper is coriaceous, and formed of the frond, the lower membra- 
nous, and rising from the ends of one or more veins. (Named in honour of Mr. John Lindsay, author of ‘ Obser- 
vations on the Germination of Ferns.’) 
l. Lindsea linearis (Sw. Fil. t. 3. f. 3); frondibus e rhizomate crasso subdistantibus linearibus 
pinnatis, pinnis sessilibus late cuneato-flabelliformibus marginibus demum revolutis integris crenatisve, soris 
continuis, stipite rachique nitido.— Br. Prodr. 156; Kunze in Schk. Suppl. p. 30. £. 16; Hook. Sp. Fil. i. 
p. 206; Fl. N. Zeal. ii. 19. (Gunn, 20, 1535.) 
Has. Abundant in heathy places.— (v. v.) (Cultivated in England.) 
Disrris. Extratropical Australia, New Zealand. 
A very common Fern, easily recognized by its stout, creeping, scaly rhizome; erect, linear, simple, pinnate 
fronds, 2-18 inches high; and broadly cuneate pinnules, which are spread out like a fan, and have entire or crenate 
anterior margins; the latter become revolute when dry.—Pinne 4 inch broad, distant; sori nearly continuous along 
their outer edge. Sfipes and rachis stout, purplish-brown, shining. 
2. Lindseea trichomanoides (Dryand. in Linn. Soc. Trans. iii. p. 43. t. 11); rhizomate repente 
paleaceo, frondibus subceespitosis late lanceolatis pinnatis bipinnatisve, pinnis primariis basi cuneatis stipi- 
ka. 
