Seedless Vascular Plants

A leaflike organ bearing one or more microsporangia.

The outer covering tissue of the plant; the epidermis or the periderm.

A leaf or leaflike stucture bearing a megasporangium.

In heterosporous plants, a spore that develops into a male gametophyte.

The food conducting tissue of vascular plants.

All tissues other than the epidermis and the vascular tissues; also called fundamental tissue system.

A small leaf with one vein and one leaf trace not associated with either a leaf gap or a leaf trace gap.

In ferns, a row of specialized cells in a sporangium; in gill fungi, the remnant of the inner veil forming a ring on the stalk.

Having only one kind of spore.

Region of parenchyma tissue in the primary vascular cylinder above the point of departure of the leaf trace or traces in ferns.

A minute outgrowth or appendage at the base of the leaves of grasses and those of certain lycophytes.

A stele in which the primary vascular tissues are arranged in discrete strands around a pith.

The lateral meristem that forms the periderm, producing cork toward the surface of the plant and phelloderm toward the inside; common in stems and roots.

Outer protective tissue that replaces epidermis when it is destroyed during secondary growth; includes cork, cork cambium, and phelloderm.

A primary division, or leaflet, of a compound leaf or frond; may be divided into pinnules.

A generally large leaf with several to many veins; its leaf trace is/are associated with a leaf gap and a leaf trace gap.

An elongated, spindle-shaped, sterile cell in the sporangium of a liverwort sporophyte.

Region of parenchyma tissue in the primary vascular cylinder above the point of departure of the leaf trace or traces in seed plants.

Membranous growth of the epiderm of a fern leaf that covers sori.

The leaf of a fern; any large, divided leaf.

A sporangium that arises from several initial cells and, before maturation, forms a wall of more than one layer of cells.

As in ferns, the coiled arrangement of leaves and leaflets in the bud; such an arrangement uncoils gradually as the leaf develops further.

A complex vascular tissue through which most of the water and minerals of a plant are conducted.

One of the cells composing a vessel.

A cylindrical sheath of meristematic cells, the division of which produces secondary phloem and secondary xylem.