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. Having the margin sharply cut into
teeth pointing forward.
SERRULATE. The same only with smaller teeth.
SESSILE. Without a stalk.
SINUS. A cleft or rounded curve between two lobes.
SINUATE. With strongly wavy margins.
SORUS A cluster of sporangia; a fruit dot.
(plu. SORI).
SPATULATE. Shaped like a druggist’s spatula or
a flattened spoon.
SPIKE. An elongated cluster of sessile sporangia.
SPINULOSE. Spiny; set with small, sharp spines.
SPORANGE (plu. A spore case. A tiny globe in which
SPORANGIA). the spores are produced.
STIPE. The stem of a fern from the ground
up to the leafy portion; the leaf stalk.
STOLON. An underground branch or runner.
SUBULATE. Awl-shaped.
TERNATE. With three nearly equal divisions.
TRUNCATE. Ending abruptly as if cut off.
TUFT. Things flexible, closely grouped into
a bunch or cluster.
VENATION. The veining of a frond or leaf.
VERNATION. The arrangement of leaves in the bud.
WHORL. A circle of leaves around a stem.
WINGED. Margined by a thin expansion of the rachis.
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. Having the margin sharply cut into
teeth pointing forward.
SERRULATE. The same only with smaller teeth.
SESSILE. Without a stalk.
SINUS. A cleft or rounded curve between two lobes.
SINUATE. With strongly wavy margins.
SORUS A cluster of sporangia; a fruit dot.
(plu. SORI).
SPATULATE. Shaped like a druggist’s spatula or
a flattened spoon.
SPIKE. An elongated cluster of sessile sporangia.
SPINULOSE. Spiny; set with small, sharp spines.
SPORANGE (plu. A spore case. A tiny globe in which
SPORANGIA). the spores are produced.
STIPE. The stem of a fern from the ground
up to the leafy portion; the leaf stalk.
STOLON. An underground branch or runner.
SUBULATE. Awl-shaped.
TERNATE. With three nearly equal divisions.
TRUNCATE. Ending abruptly as if cut off.
TUFT. Things flexible, closely grouped into
a bunch or cluster.
VENATION. The veining of a frond or leaf.
VERNATION. The arrangement of leaves in the bud.
WHORL. A circle of leaves around a stem.
WINGED. Margined by a thin expansion of the rachis.
NOTE
The student should have some idea of the terms genus, species and variety, although they are not capable of exact definition.