262 The Botanical Gazette. [May, 
Pellaea (HYMENOLOMA) membranacea, n. sp. Plate XVIII, 
6. 
$06 0: 
Rootstock not seen, but probably rhizomataceous with dis- 
tinct fronds 2 to 3° high: stipes (in the specimens) 20” tall, 
and, as well as the primary and lower half of the secondary 
rachises, naked, bright red, polished and furrowed on the 
face: lamina 12" long, nearly as broad at base, ovate-deltoid, 
bi- to tripinnate above, tri- to quadripinnate below, the acute 
apex, as well as the apices of pinnz and pinnules, deeply pin- 
natifid; pinne suberect, unequal-sided, stalked, lower pair 
much the largest and deltoid-ovate with ovate lanceolate 
stalked pinnules 13 to 3" long (in the lower series), % to i 
broad; pinnules pinnate, the divisions again pinnated below, or 
obliquely cleft throughout into linear-oblong, cuneate or obo- 
vate crenate segments; texture firm herbaceous, surfaces 
naked, or minutely glandular above, the changed margins re- 
flexed and forming a membranous border all round the divis- 
tons and winged rachises of the pinnules, the edge irregular ly 
laciniate or fringed with stalked glands; veins obscure, 
except in a strong light when they are seen to 0 
simply pinnate, the distant alternate branches terminating 
in the sinuses of the segments, and when soriferous bearing 4 
single small round sorus at the end: sori not confluent: 
involucres broad, overlapping to the center before maturing, 
and consisting of a part of the membranous margin of the 
lamina.—5963, ravines, Sierra de San Felipe, Dec. 19, 1895. 
Mr. Pringle writes that he first saw the fern growing ™ 
moist Cafions high up in the Sierra de Oaxaca in the spring of 
1894, but that then the plants were too young to collect. 
He did not return later for it ‘‘partly because other plants 
crowded upon me, and partly because I feared it might prov’ 
only a form of Pellaca marginata. Last December, however 
when I was on the same mountains I came upon a plant i 
had not died down and took two fronds in order to find 0 
PELLAEA PRINGLEI Davenport. 
7081, wet cliffs, near Cuernavaca, Morelos, Nov. 21; 1895- 
