40 NORTH AMERICAN FLORA [VoLuME 16 
surfaces; fertile pinnae exceeding the sterile lamina, often 
greatly so. 22, A. mexicana. 
Leaf-tissue very coriaceous, the veins impressed above ; fertile 
pinnae invariably shorter than the sterile lamina, usually 
much so. 23. A. speciosa. 
Sterile lamina at least bipinnatifid at the base. 
Pinnae remote, strongly ascending, the pinnules and segments 
very oblique and slender; tissue rigidly herbaceous. 24. A. cuneala. 
Pinnae contiguous, spreading, the pinnules or segments spread- 
ing and broader ; tissue coriaceous. 
Sterile lamina bipinnatifid or (rarely) bipinnate at the base, 
5 cm. or less long. 25, A. coriacea. 
Sterile lamina bipinnate to quadripinnatifid, much larger. 26. A. adiantifolia. 
1. Anemia Phyllitidis (L.) Sw. Syn. Fil. 155. 1806. 
Osmunda Phyllitidis I,. Sp. Pl. 1064. 1753. 
Anemia longifolia Raddi, Pl. Bras. 1: 69. 1825. 
Anemia cordifolia Presl, Rel. Haenk, 1: 73. 1825. 
Anemia Haenkii Presi, Rel. Haenk.1: 74. 1825. 
Anemidictyon Phyilitidis J. Smith, in Hook. Gen. Fil. p/. 203. 1842. 
Aneimidictyum Haenkii Presi, Abh. Béhm. Ges. Wiss. V. 4: 354. 1845. 
Aneimidictyum Haenkti cordifolium Presl, Abh. Bohm. Ges. Wiss. V.4: 354. 1845, 
Rhizome ascending ; fronds several, fasciculate, the stipe of the fertile fronds some- 
times surpassing the sterile fronds, rarely much so. Fertile fronds (including the elongate 
fertile pinnae) 25-70 cm. long; stipe 15-48 cm. long, usually much longer than the sterile 
lamina, rusty fibrillose-villous, sometimes thickly so, commonly glabrescent with age, 
stramineous, sulcate; sterile lamina broadly ovate-oblong to orbicular, 7-28 cm. long, 8-25 
cm. broad, simply pinnate, the rachis similar to the stipe; pinnae 2-7 pairs, approximate 
or rarely apart, somewhat ascending (or the lower ones spreading), sessile or mostly short- 
petiolate, subequal, or in odd-pinnate fronds the upper ones gradually smaller; lower pinnae 
4-14 cm. long, 1.5-3.5 cm. broad, ovate to ovate-lanceolate or lanceolate, acute or acumi- 
nate, often attenuate, mostly falcate or subfalcate, at the base subequally rounded, less 
commonly subcordate or truncate, above the base inequilateral, the lower side the broadest, 
the costa stout, yellowish, excurrent to the apex, rusty-pilose ; succeeding pinnae similar, 
the upper ones usually cuneate or even excavate at the upper side of the base, rounded 
below, the uppermost sometimes semi-adnate below ; terminal pinna (if present) usually a 
little larger than the next below, truncate or inequilateral at the base, rarely joined to 1 or 
2 below; veins slightly elevated above, usually subimmersed below, copiously anastomos- 
ing, the areoles ample, elongate, oblique; leaf-tissue herbaceo-subcoriaceous, somewhat 
lustrous above, paler and minutely glandular below, rigidly and sparingly pilose among and 
upon the veins both above and below, usually glabrescent ; margins crenulate to irregularly 
dentate, delicately cartilaginous, whitish ; fertile pinnae 8-34 cm. long, usually exceeding 
the sterile lamina (often much so), the panicle commonly as long as the stalk or longer, 
the branches usually close, with very numerous copiously fertile segments; spores striate, 
echinulate. Sterile fronds smaller than the fertile, often only one half as long, rarely up 
to 65 cm. long; lamina similar to that of the fertile frond. 
TYPE LOCALITY: Santo Domingo. 
DISTRIBUTION: Greater Antilles (not common) ; Mexico and Central America generally ; also 
in South America, 
ILLUSTRATIONS: Plumier, Traité Foug. p/. 156; Raddi, Pl. Bras. 1: p/. 8; Presl, Rel. Haenk. 
1: pL 11, f.3 (as A. cordifolia) ; Hook. loc. cit.; Lowe, Ferns Brit. & Exot. 8: p/. 71; J. Smith, 
Ferns Brit. & For. f 144; E. & P. Nat. Pfl. 14: 370, f. 198, A. 
2. Anemia Underwoodiana Maxon, sp. nov. 
Rhizome relatively small, erect, the fronds few and closely clustered, the stipe of the 
fertile fronds equaling or scarcely equaling the sterile fronds. Fertile fronds 20-35 cm. 
long; stipe 12-18 cm. long, rusty fibrillose-pilose, thickly so at first, stramineous, darker 
at the base, sulcate; sterile lamina deltoid to broadly ovate-deltoid, 7-16 cm. long, 7-14 
cm. broad, simply pinnate, acuminate, the rachis compressed and densely rusty-pilose; 
pinnae 3-7 pairs, approximate, contiguous or somewhat imbricate, ascending or the lower- 
most spreading, these the largest, sessile, oblong-lanceolate, attenuate, subequally and 
broadly cuneate or sometimes slightly rounded at the upper side; upper pinnae gradually 
