












76 THE BRITISH FERNS. 
Var. acutum: fronds deltoid, tripinnate throughout, and as well 
as the pinns (the lower pair especially) caudate; ultimate pinnules 
narrow-lanceolate, inciso-pinnatifid, the ultimate lobes linear, erect, 
very acute, entire. [Plate LXXII.] 
ASPLENIUM ADIANJUM-NIGRUM, v. ACUTUM, Pollini, Fl. Ver. iii. 288, t. 2, fig. 2a. 
Newman, Hist. Brit. Ferns, 2 ed. 259. Moore, Handb. Brit. Ferns, 3 ed. 
170; Id., Ferns of Gt. Brit. Nature Printed, t. 37 ; Id., Ind. Fil. 110. 
ASPLENIUM ACUTUM, Bory MS. Willdenow, Sp. Plant. v. 347, according to an 
authentic specimen, in Herb. Heward, communicated by M. Bory. New- 
man, Hist. Brit. Ferns, 3 ed. 230 (excl. syn. Smith). Babington, Man. 
Brit. Bot. 4 ed. 425. Poiret, Enc. Supp. ii. 515. Sprengel, Syst. Veg. iv. 
90. Sadler, Fil. Hung. 31. Presl, Tent. Pterid. 107. Fee, Gen. Fil. 190. 
Link, Fil. Sp. 96. Mettenius, Pil. Hort. Bot. Lips. 77. 
ASPLENIUM ADIANTUM-NIGRUM, Bory, Ess. Isles Fortunées, 313. 
ASPLENIUM ADIANTUM-NIGRUM, V. ANGUSTATUM, Desvaux, Ann. Soc. Linn. de 
Paris, vi. 278. 
ASPLENIUM VIRGILII, Bory, Expéd. de la Morée, 289. Gussone, Fl. Sic. Syn. 662. 
ASPLENIUM PRODUCTUM, Lowe, Trans. Camb. Phil. Soc. vi. 524. 
ASPLENIUM ÁDIANTUM-NIGRUM ONOPTERIS, Heufler, Aspl. Europ. 76. 
ASPLENIUM DAVALLIOIDES, Tausch, Flora, xxii. 479. 
ASPLENIUM PATENS, Gaudichaud, Frey. Voy. 320. 
TARACHIA ACUTA, Presl, Epim. Bot. 82. 
Var. obtusatum : fronds ovate, smaller and less divided, bipin- 
nate, or subbipinnate; pinne blunt or bluntish, not acuminate ; 
pinnules ovate, their rounded apices toothed ; rachis winged. [ Plate 
LXXI A.] 
ASPLENIUM ADIANTUM-NIGRUM, v. OBTUSATUM, Moore, Handb. Brit. Ferns, 
3 ed. 170. 
ASPLENIUM ADIANTUM-NIGRUM, v. OBTUSUM, Newman, Hist, Brit. Ferns, 9 ed. 
258. Moore, Handb. Brit. Ferns, 2 ed. 155 ; Id., Ferns of Gt. Brit. Nature 
Printed, t. 36, fig. C, D (excl. var. syn.) 
Var. microdon: fronds pyramidal, or elongate-deltoid, pinnate 
below; the pinnæ pyramidal, spreading, minutely sharp toothed ; 
lower pair of pinne shortly stalked, cordately hastate and lobate at 
the base; the rest more or less adnate, subhastately aurieulate, those 
of the upper half confluent into an irregularly pinnatifid apex; sori 
linear elongate, near the costa, often scolopendrioid. 

Caudex short, stoutish, tufted, often decumbent, scaly. Scales 
lanceolate below, extended into a long hair-like point, dark purple- 

