. A popular description of the common Oregon ferns; contribution from the Herbarium of the University of Oregon. 23 GLOSSARY. Fertile—Bearing spores. Frond—Leaf of a fern. Gland—A cell, usually a hair, that yields a secretion. Habit—General appearance of a plant. Habitat—The locality in which a plant grows; also its distribution. Indusium—The thin membrane covering a fruit dot. Inferior—Attached below; said of an indusium below the sporangia. Linear—Long and narrow, with parallel margins. Pinna—First division of a pinnate frond. Pinnate—Divided into leaflets along a common stalk. Pinnatifid—Wh
. A popular description of the common Oregon ferns; contribution from the Herbarium of the University of Oregon. 23 GLOSSARY. Fertile—Bearing spores. Frond—Leaf of a fern. Gland—A cell, usually a hair, that yields a secretion. Habit—General appearance of a plant. Habitat—The locality in which a plant grows; also its distribution. Indusium—The thin membrane covering a fruit dot. Inferior—Attached below; said of an indusium below the sporangia. Linear—Long and narrow, with parallel margins. Pinna—First division of a pinnate frond. Pinnate—Divided into leaflets along a common stalk. Pinnatifid—When the divisions do not extend to the rachis or midrib. Rachis—The continuation of the stipe through a compound frond. Re flexed—Abruptly bent or turned backward. Rhizome—Underground stem. Simple—Not lobed or forked. Sorus—A fruit dot. Sporangium—A spore case. Sterile—Not bearing spores. Stellate—Star-shaped. StijDe—Stem of a frond. Superior—Higher, applied to indusia that are attached above the —Having three main segments. 24 A POPULAR DESCRIPTION OF.
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