Flora of North America Glossary
Displaying 1226-1250 of 2673
| Term | Synonyms | Category | Limitation | Definition |
|---|---|---|---|---|
| interpetiolar | < nodal | position | Upon the stem between the bases of opposite leaves. | |
| interrupted 1 | architecture | foliaceous structure | Compound with the leaflets alternately large and small. | |
| interrupted 2 | architecture | inflorescence | Having one or more gaps in an otherwise uniform distribution of flowers or branch units along the main axis. | |
| intravaginal | insertion | Within the leaf sheath. | ||
| intravaginal | position | Within the leaf sheath. | ||
| intricate | arrangement | Entangled; irregularly intertwined and not readily disentangled. | ||
| introrse | dehiscence | anther | Opening inwardly, on the adaxial side. See also extrorse, latrorse. | |
| intruded | placentation | Upon partial septa excrescent from the wall of a compound, unilocular ovary. | ||
| involucel | STRUCTURE | One or more closely proximate whorls of bractlets (bracteoles, prophylls) immediately subtending (below or outside) a subordinate portion of an inflorescence that is subtended as a whole by an involucre, the bractlets often leaf-like, sometimes petaloid. | ||
| involucral | derivation | aril | Produced from or a modification of a persistent involucre investing the seed. | |
| involucral bract | = phyllary; < bract (broad sense) | STRUCTURE | One of the bracts composing the involucre of a capitulum (head,); in Asteraceae (Compositae). | |
| involucrate 1 | architecture | inflorescence | Subtended by an involucre. | |
| involucrate 2 | architecture | capitulum (head) | Having an involucre. | |
| involucre 1 | STRUCTURE | One or more closely proximate whorls, or a compact spiral, of bracts immediately subtending an inflorescence, the bracts sometimes leaf-like, sometimes petaloid. | ||
| involucre 2 | STRUCTURE | One or more closely proximate whorls, or a compact spiral, of bracts (phyllaries) surrounding (proximal to) the compound receptacle (torus) and florets of a capitulum (head); in Asteraceae (Compositae). | ||
| involute 1 | margin | Rolled adaxially. | ||
| involute 2 | vernation | Each rolled adaxially from the lateral margins. | ||
| iridescent | coloration | Reflecting a pattern colors from throughout the visible spectrum, the pattern changing with the angle of view. | ||
| irregular 1 | architecture | perianth, calyx, corolla | Imperfectly actinomorphic, the constituents disposed symmetrically but unequal in size and/or shape. See also peloric. | |
| irregular 2 | course | Deviating asymmetrically from a straight line. | ||
| isodiametric | architecture | Of approximately constant breadth in all median planes. | ||
| isopetalous | architecture | flower, perianth, corolla | Having the petals essentially alike in size and shape. | |
| isopolar | architecture | pollen grain, spore | Having evident polarity, the proximal and distal halves similar. | |
| isosepalous | architecture | flower, perianth, calyx | Having the sepals essentially alike in size and shape. | |
| isostemonous | architecture | flower, androecium | Having the stamens essentially alike in size and shape. |
Displaying 1226-1250 of 2673