TAD. CLIH. 
ASPLENIUM PETRARCI E. 
FILICES.—GvnATzE. Br.  PorvropiACExX. Kaulf. — FrxiczEs vere. Willd. 
GzN. Cuang. J4SPLENIUM, Linn. Sori lineares, sparsi, dorsales. —Zzvolucrum e vena latera- 
liter ortum ducens, margine superiore libero. Z. 
ASPLENIUM Petrarche ; frondibus lineari-oblongis ubique glanduloso-pilosis pinnatis, pinnis oblon- 
gis pinnatifidis, basi cuneatis, laciniis obtusis dentatis, stipite rachique inferne nigris. 
Asplenium Petrarche. — Spreng. Syst. Feset. v. 4. p. 86. 
Asplenium glandulosum.  * ZLoíseleur" (Spreng). 
Asplenium Vallisclaus;. — Zequien in Descr. de la Font. de F'aucl. ed. 9. p. 239. 
Polypodium Petrarche. — Zeguien in. Deser. de la Font. de Vaucl. ed. 1. 
Has. In rupibus siccis Galli australis, prope fontem Vallisclausz. Hequien; Bentham; 
irnott. Ad rupes prope Monspeliam. Heguien; Bentham. 
Jadix parva, ceespitosa, fibrosa, fibris brevibus intertextis, ramosis. 
Stipites plurimi, ex eodem puncto, vix semiunciam longi, nigri, nitidi, glanduloso-pilosi. 
Frondes bi-triunciales vel paulo altiores, circumscriptione lineares vel oblongo-lineares, pinnate, pinnis remotius- 
culis, plerumque alternis, oblongis vel ovato-oblongis, obtusis, obsolete nervosis sessilibus, basi cuneatis, 
pinnatifidis, lobis rotundatis, obtusis, dentatis crenatisque, viridibus, utrinque glanduloso-pilosis, glandulis 
fulvis. Zachis ubique piloso-glandulosa, superne viridis, inferne nigra, nitida. 
Sori oblongi, demum subconfluentes. 
Involucrum lineari-oblongum, membranaceum, pallide fuscum. 
Capsule sublonge pedicellatze, fuscze, annulo lato cinctze. 
Semina. ovalia, intense fusca, limbata, limbo corrugato. 
Fig.1. Pinna. f.2. Capsule. f.3. Pili glandulosi. f.4. Semina :—magn. auct. 
This may well be reckoned among the very rarest of the European Filices, nor has it yet been 
introduced into any general work on Ferns, save the recently published one of eprengel, the 4th 
volume of his Systema P'esetabilium, where the name of Petrarche of DeCandolle is chosen in 
preference to those of g/andulosum of Loiseleur, and Fallisclause of Requien in the 2nd edition 
of his * Description of the Fountain of Vaucluse." "The last author appears to have been its 
n discoverer, and he named it in the first instance Polypodium Petrarche. He afterwards, 
in company with M. de Suffren, gathered it in Provence, and then changed the specific name to 
F'allisclause. : 
Our specimens were gathered by Messrs. Arnott and Bentham at Vaucluse, and by the latter 
gentleman near Montpellier, always growing on very hot, dry, and exposed perpendicular faces of 
the rocks, where it is difficult, on account of the brittle nature of the fronds, to select good 
- Specimens. 
Mr. Arnott tells us in his * Tour to the South of France and the Pyrénées," published in 
Jameson s Edinburgh New Philosophical Journal, April 1826, that at Vaucluse this plant is 
becoming exceedingly scarce, and that if not protected from the ravages of Botanists it will soon 
be extinct there. 
In habit the species is allied to 24. viride and 24. Trichomanis, but abundantly different from both in 
its much smaller size, longer pinnze, which are pinnatifid, and especially in the curious, pedicellated 
glands, with which the whole plant is clothed to such a degree as to give it a hoary appearance. 
