Anther : upper portion of the stamen that produces the pollen. Image
Awn : A long, bristle-like appendage as on the floret of a grass. Image
Calyx : Outermost ring of flower parts, composed of sepals. Usually green. Encloses the developing bud and usually persists below the open flower. Image
Composite flower head : The specialized flower of the Sunflower family (Asteraceae). Tiny flowers, crowded together on a common base (the receptacle), resemble a single bloom. Flowers are of one or two types: symmetrical disk flowers and strap-shaped ray (or ligulate) flowers. Image
Compound leaf : A leaf composed of distinct, leaf-like leaflets arranged along the leaf stem. Arrangement either bilaterally symmetrical (pinnate) or radially symmetrical (palmate). A leaflet may be distinguished from a true leaf because a leaf has a small bud where the stem joins the main plant; a leaflet does not.
Corolla : Collective term for the petals on a flower. Image
Cotyledon : “Seed leaf”; leaf produced in the embryo and usually the first to emerge on a young plant. Traditionally, flowering plants were divided into Monocotyledons (monocots) and Dicotyledons (dicots) depending on whether the embryo had one or two cotyledons. Although this system of classification has been modified, the distinction is still useful.
Dicot : Or Dicotyledon; in a previous taxonomic system this was one of two major divisions of flowering plants, characterized in part by having two seed leaves (cotyledons) and flower parts in multiples of 4’s or 5’s. The dicots were recently replaced by Eudicots and Basal Dicots; the former corresponds closely with the original Dicot division.
Disk floret : (Disk flower): A tiny, symmetrical flower of a composite flower head (sunflower family, Asteraceae). In a daisy, disk florets form the inner eye. Image
Filament : Thread-like part of the male reproductive structure that supports the anther. Image
Flower head : In the sunflower family, one group of flowers clustered on a common base; often assumed to be one blossom. Image
Glume : One of two scale-like bracts at the base of a grass spikelet; unlike most bracts, a glume does not subtend a flower. Image
Involucre : A group of bracts (phyllaries) that form a unit below a flower, flower cluster, flower head (composite flower) or fruit. Image
Lemma : he lower of two bracts at the base of a grass floret; the upper is the palea. Image
Nectary : Nectar producing glands, often in the base of a flower. Image
Palea : The upper of two bracts at the base of a grass floret; the lower is the lemma Image
Pappus : A hairy or bristly modified calyx on the seeds of some composite flowers; often aids in seed dispersal. Image
Petal : One of several modified leaves that surround the reproductive structures of a flower; often brightly colored. Image
Phyllary : One of several bracts around the base of a composite flowerhead Image
Pistil : The female reproductive structure of a plant, usually consisting ovary, style and stigma. Image
Ray floret : (Ligulate floret): A tiny, strap-shaped flower of a composite flower head (sunflower family, Asteraceae). In a daisy, ray florets form the outer halo. Some botanists recognize two types of strap-shaped florets: a ray floret has three petals fused into the strap and two rudimentary petals, is found only on the periphery of the flower head and usually lacks stamens; other strap-shaped florets are called ligualate florets. Image
Receptacle : The part of the plant to which a flower is attached. Image
Sepal : Individual element of the calyx, which encloses the flower bud; usually leaf-like. Image
Stamen : The male reproductive structure of a flowering plant. Consists of a pollen-producing anther supported by the thread-like filament. Image
Stigma : Top portion of the pistil which captures the pollen. Image
Style : Narrow portion of the pistil that connects the stigma and the ovary. Image
Umbel : A flower arrangement in which the pedicels of the flowers originate from a single point, much like the ribs of an umbrella.