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In botany, a perigynium (plural: perigynia), also referred to as a utricle, typically refers to a sac that surrounds the achene of plants in the genus Carex . [ 1 ] [ 2 ] The perigynium is a modified prophyll , also known as a glume , which is tissue of leaf origin that encloses the dry, one-seeded achene.
Antigonon leptopus is a species of perennial vine in the buckwheat family commonly known as coral vine or queen's wreath.This clambering vine is characterized by showy, usually pink flowers that can bloom throughout the year and large, heart-shaped leaves.
The arching horizontal racemes of up to 20 pendent flowers are borne in spring and early summer. The outer petals are bright fuchsia-pink, while the inner ones are white. The flowers strikingly resemble the conventional heart shape, with a droplet beneath – hence the common name. [4]
In an epigynous flower, the stamens, petals, and sepals are attached to the hypanthium at the top of the ovary or, occasionally, the hypanthium may extend beyond the top of the ovary. Epigynous flowers are often referred to as having an inferior ovary. Plant families with epigynous flowers include orchids, asters, and evening primroses.
Each flower produces a 1.5–2.5 cm beaked capsule which hold many flattened seeds with stiff marginal hairs. [5] [6] N. peltata is similar in appearance to Nuphar variegata and species in the genus Nymphaea. [3] N. variegata can be distinguished from N. peltata most easily by its larger leaves, which can measure up to 30 cm, and its cup-shaped ...
The pericardium (pl.: pericardia), also called pericardial sac, is a double-walled sac containing the heart and the roots of the great vessels. [1] It has two layers, an outer layer made of strong inelastic connective tissue (fibrous pericardium), and an inner layer made of serous membrane (serous pericardium).
The flower heads grow in much-branched arrays called panicles and are racemose. They generally stay on the upper sides of their stalks, which are called peduncles. [12] The flower heads at the ends of the peduncles mature approximately one week before those on the rest of the plant. [15] Several flower heads of S. lateriflorum
Diagram of flower parts. In botany, floral morphology is the study of the diversity of forms and structures presented by the flower, which, by definition, is a branch of limited growth that bears the modified leaves responsible for reproduction and protection of the gametes, called floral pieces.