Use the 'BACK' button to return to where you were, if you
want. Otherwise, this is a link-poor page.
Sex part used to create seeds.
Flowers and Flower-like Structures:
Achene: A dry type of fruit that contains a single
seed; e. g., fruit produced by members of the Aster family.
Anther: Male part of the flower that produces
Corolla: See petals, below.
Disc flower: Flower of the Aster family
characterized by a short tube of fused petals and a pappus
of bristles attached to the ovary.
Filament: Stalk-like part of the stamen that
supports the anther.
Flower head: A structural unit of several small
flowers attached to a receptacle; looks like a single
flower, but is a unit of clustered flowers on a common base.
e. g., flower head of the Aster family; a sunflower.
Inflorescence: A fancy word for the cluster of
flowers or flowering heads on a plant; typically occurs in a
characteristic pattern; examples of patterns include: cyme,
panicle, raceme, spike, and umble.
Involucral bracts: Small leaf-like structures that
occur on the underside of the receptacle; e. g., in the
Ovary: Lowermost part of the pistil; contains the
developing seed(s) and forms the fruit.
Pappus: A cluster of bristles attached to the
upper part of the ovary; may aid in seed dispersal.
Petals: Uppermost, leaf-like structures of a
flower that are usually brightly colored; collectively the
petals form the corolla. The petals of the corolla may be
fused to form a tube or other configuration.
Pistil: Female part of the flower comprised of the
ovary, style, and stigma.
Ray flower: Flower of the Aster family
characterized by an elongate ribbon-like ray of fused petals
and a pappus of bristles above the ovary.
Receptacle: A fleshy structure at the tip of a
stem that serves as a support for one or more attached
flowers or flowering parts.
Recurved: Concave or "indented" curve, formed by
the margins of a leaf, where they join at the tip or the
base of the blade.
Sepals: Leaf-like structures located beneath the
petals of a flower; collectively the sepals form the calyx,
and are usually green. Some species of flowers lack petals,
in which case the sepals may be brightly colored and take
over the function of the missing petals, e. g.,marsh
marigold (Family Ranunculaceae).
Stamen: Male part of the flower comprised of the
anther and filament.
Stigma: Uppermost part of the pistil; receives
Style: Central part of the pistil through which
pollen tubes pass; connects the stigma with the ovary.
Attached individually: Leaves that occur singly
and independently on the stem; as opposed to leaves that are
paired on the stem; same as alternate.
Attached in pairs: Two leaves that are attached
across from each other on the stem at the same level; same
Axil: The angle, typically acute, formed by the
leaf and the stem where they join.
Basal leaves: Leaves that occur on the lower or
lowest part of the stem, at or near its base, toward the
Blade: The broad or flat part of a leaf that
attaches to the petiole, or, in the absence of a petiole, to
Compound leaf: A leaf in which the blade is
subdivided into several small leaf-like structures, called
leaflets, that share a common petiole. The number of
leaflets may vary within or between species; for example, a
compound leaf may have from 5 - 7 leaflets or from 7 - 9,
Hairs: See under "Stems," below.
Margin: The edge of the leaf, from the tip of the
blade to the blade's junction with the petiole.
Lance-shaped or Lanceolate: An elongate leaf that
is rounded at one end and pointed at the opposite end;
likened to the head of a spear; spear-shaped; also
lanceolate; lance-shaped leaves are attached by their
rounded ends; ob-lance-shaped leaves are attached by their
pointed ends; also oblanceolate.
Leaflet: The part of a compound leaf that
resembles an individual leaf blade, and which is one of
several similar structures that are attached to a common
petiole; also, leaf-like sub-divisions of a compound leaf;
the leaflets together make up the blade of a compound leaf.
Ovate: A flattened form that has an egg-like
shape. Ovate leaves are attached with their broadly curved
end toward the stem.
Palmate compound leaf: A compound leaf in which
the leaflets emerge radially from a common point of
attachment on the petiole.
Palmate veined: Pattern in which the principal
veins of the leaf emerge radially from a common point near
the petiole, and there is no dominant central vein.
Parallel veined: Pattern in which the principal
veins of the leaf emerge from a common point near the
petiole, and extend to the tip of the leaf, while remaining
parallel to the edge of the leaf, and to each other.
Petiole: A narrow stalk-like structure that
connects the leaf blade to the stem.
Pinnate veined: Pattern in which paired side veins
emerge serially, in "V" like fashion from the principal
central vein, throughout the length of the leaf.
Simple leaf: A leaf in which the blade is a single
unit and not subdivided into leaflets.
Smooth edge: A leaf margin that lacks teeth, and
is otherwise uninterrupted.
Teeth: A series of alternating projections and
indentations along the margin of a leaf; likened to the
cutting edge of a saw; may be coarse, fine, or double, etc.
Veins: Web-like thickenings in the leaf tissue
that occur in specific patterns; e. g., pinnate, palmate,
Winged petiole: A petiole having narrow extensions
of the leaf blade that continue along each side of the
petiole, from the base of the blade to the stem.
Axil: See under "Leaves," above.
Basal leaves: See under "Leaves," above.
Hairs: Small bristle-like extensions of the
cuticle of stems and leaves, that vary in texture, size, and
density; for example: a stem that is "densely covered with
conspicuous, rough, hairs."
Wings: Intermittent, well-spaced, narrow,
leaf-like, structures that run longitudinally along the
sides of some stems; e. g., nodding thistle. See also winged
petioles, under "Leaves," above.
" - Inches
' - Feet