FILICES. (FERNS.) . 691 
2. A. Capillus-Veneris, L. Frond ovate-lanceolate, 2-3-pinnate; pin- 
nules very delicate, oblique, broadly wedge-shaped or sometimes rhomboid, 
rather long-stalked, the upper margin deeply incised and fruit-bearing or sterile 
and dentate ; stipe slender, ebeneous ; rachis almost capillary, flexuous. — Mostly 
pendent from Limestone cliffs, Florida, Alabama, and westward. — Fronds 19 — 
3? long. 
8. BLECHNUM, L. - 
Sporangia on a transverse elongated receptacle parallel to the midrib, combin- 
ing the veins near their bases. Indusium fixed by its outer margin, opening in- 
ward. Veins of the sterile fronds free. Fronds simple or pinnate. 
1. B. serrulatum, Michx. Fronds erect, rigid, pinnate; pinnz articu- 
lated with the rachis; fertile ones linear-lanceolate, acute, finely and sharply: 
serrate; fruit close to the midrib; sterile ones broader, bearing a few chaffy 
scales along the midrib. (B. angustifolium, Willd.) — Florida, Michaux, 
Buckley! 
9. WOODWARDIA, Smith. 
Fruit-dots linear-oblong, in one or two series on transverse anastomosing 
veinlets parallel and near to the midrib. Indusium attached by its outer margin 
to the veinlet, opening inward. Veins more or less reticulated, free toward the 
margin of the frond. Fronds mostly pinnatifid or pinnate. : 
1. W. angustifolia, Smith. Fronds smooth, pinnatifid ; the sterile ones 
ovate, with broadly-lanceolate finely serrate divisions, united at the base and 
decurrent on the stipe, the veins reticulated in several series of areoles; fertile 
fronds taller, with narrowly linear entire divisions, and a single series of elon- 
gated areoles, each containing an oblong fruit-dot with a vaulted indusium, 
(Acrostichum areolatum, Z. W. onocleoides, Willd.) — Bogs and shady banks, 
Florida, and northward. — Rootstock creeping, elongated, as thick as a goose- 
os Stipe 6'- 12/ high, about the length of the frond. 
. W. Virginica, Willd. Fertile and sterile fronds alike, ovate, smooth, 
pandit pinne lanceolate, narrowed at both ends, pinnatifid ; segments oblong, 
obtuse; veins forked, forming a single series of areoles along the midrib both of 
the pinnze and of the segments; areoles fruit-bearing in the fertile frond. — Shal- 
low ponds, Florida to Mississippi, and northward. — Rootstock as thick as one’s 
finger, creepingg elongated, with a tough black exterior, the interior soft and 
white. Fronds 19 - 49 high; stipe smooth. 
10. CAMPTOSORUS, Link.  WALKING-LEAF. 
Xni dots linear or oblong, straight or curved, scattered irregularly on the back 
of the frond, often opposite in pairs, or conyerging and united. Indusium linear, 
attached by one margin to the reticulated veins of the simple frond. : 
Co dep. qi. phyllus, Link. - Proc OA AES: AA 
5 ‘sate at the baso; lon cuni, oin rooting at dp em giving 
