ove the
base and tapering to the apex.
LOBE. A small rounded segment of a frond.
MIDRIB. The main rib or vein of a segment,
pinnule, pinna, or frond; a midvein.
MUCRONATE. Ending abruptly in a short, sharp
point.
OBLONG. From two to four times longer than
broad and with sides nearly parallel.
OBTUSE. Blunt or rounded at the end.
OIDES. A Greek ending, meaning _like_, or
_like to_, as polypodioides--like to a
polypody.
OOeSPHERE. The egg-cell in fern reproduction--becoming
the ooespore when fertilized.
OVATE. Egg-shaped with the broader end
downward.
PALMATE. Having lobes radiating like the
fingers of a hand.
PANICLE. A loose compound cluster of flowers
or sporangia with irregular stems.
PEDICEL. A tiny stalk, especially the stalk of
the sporangia.
PELLUCID. Clear, transparent.
PERSISTENT. Remaining on the plant for a long
time, as leaves through the winter.
PETIOLE. The same as stalk or stipe.
PINNA. One of the primary divisions of a frond.
PINNATE. Feather-like; with the divisions of
the frond extending fully to the rachis.
PINNATIFID. Having the divisions of the frond
extend halfway or more to the
rachis or mid vein.
PINNULE. A secondary pinna. In a bipinnate
frond one of the smaller divisions
extending to the secondary midvein.
PROCUMBENT. Lying on the ground.
PROTHALLIUM. (Or prothallus.) A delicate, cellular,
leaf-like structure produced
from a fern spore, and bearing the
sexual organs.
PTERIDOPHYTA. A group of flowerless plants embracing
ferns, horsetails, club mosses, etc.
PUBESCENT. Covered with fine, soft hairs; downy.
RACHIS. The continuation of the stipe
through the blade or leafy portion
of the fern.
REFLEXED. Bent abruptly downward or backward.
RENIFORM. Kidney-shaped.
REVOLUTE. Rolled backward from the margin or apex.
ROOTSTOCK. (Or rhizome.) An underground
stem, from which the fronds are produced.
SCAPE. A naked stem rising from the ground.
SEGMENT. One of the smaller divisions of a
pinnatifid frond.
SERRATE. H