TAB. XVI.
A T H Y R IU M . P n s l.
A t h y r i i Sp. Roth, P r e s i A l l a n t o d ia . B r . Kaulf. D a r e æ Sp. Willd.
A s p id i i Sp. Sw. et A u c t N e p h r o d iu m . Rich, hi Mich.
Sori oblongi, breves, incurvi au t inflexi, rarius recti, medio venarum inserti. In dusium
oblohgum, inflato-convexum, demum reflexum Rliizorna subglobosum.
Frondes fasciculatee, herbaceoe, pinnatim divisæ. Venæ pinnatæ, internal, tenues,
simplices, medio dorso soriferæ. Presl.
Athyrium australe. Presl, Fterid. p . 98.— Allantodia B r . Prodr. p . 149.
The Australian plant here represented was, together with another species from the same
country (A . tenerum), referred hy Mr Brown to his new genus Allantodia, the essential
character of which he considered to consist in the “ Involucrum fornicatum e vena lateraliter
ortum, eique utroque margine insertum, interiore dehiscente." Kaulfuss has, however,
perhaps witli justice, referred it to Athyrium, along with Aspidium fontanum, Filix
famina, asplenioides, umbrosum, &c. of Sw., and several Asplenia of other Authors. But
the genus is perhaps too closely allied to Aspknium, differing scarcely in any thing but the
shorter, inflated, and frequently curved indusium.
F ig . 1. Under surface o f a portion of a fertile frond; magn. 2 diam -f. 2. Segment o f a young
frond, under side ; m. 10 diam—-f. 3. Similar portion in a ripe sta te ; m. 10 diam.—/ 4. Vertical
section of a ripe sorus ; m. 20 diam.—/ . S. Sporangia in various s ta te s ; m. 100 diam.—/ 6. Sporules ;
m. 400 diam.
r . f
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