Displaying 281 - 320 out of 621 Object(s)
| Term | Definition | |
|---|---|---|
| Hygrochastic | Referring to a type of plant movement caused by the absorption of water; e.g., the opening of capsular fruits as the result of taking in moisture from the air. | |
| Hygroscopic | Readily taking up and retaining moisture; structures sometimes change in position as a result of alternating gain and loss of water. | |
| Hypocrateriform | Referring to the shape of a sympetalous corolla in which the tube is slender and the lobes are abruptly spreading and flat. Same as salverform which is preferred over hypocrateriform. |  |
| Imbricate | Referring to a type of aestivation in which the sepals or petals overlap at the adjacent edges or to the overlapping leaf bases as found in some species of Bromeliaceae. |  |
| Impressed | Sunk below the surface as if pressed in; e.g., some leaf veins in relation to the rest of the leaf surface. Compare with immersed. |  |
| Inaperturate | Without openings, often used to refer to pollen grains without pores. | |
| Included | Not protruding from a structure, such as the stamens from the corolla. Opposite of exserted. |  |
| Indehiscent | Not opening; usually applied to fruits that remain closed at maturity. Opposite of dehiscent. |  |
| Indeterminate | Referring to an inflorescences whose main axis continues to grow; i.e., is not terminated by a flower (e.g., a raceme); referring to the compound leaf of Guarea (Meliaceae) in which the tip of the rachis has the potential to continue growing. |  |
| Indument | A covering of trichomes. | |
| Indurate | Hard. | |
| Inflexed | Bent inward. | |
| Infra- | A prefix meaning “beneath” or “below” or “not quite reaching”; e.g., “infraterminal” means below the apex, an inframarginal vein is one that does not quite reach the margin, and an infrageneric classification is one in which the species of a genus are placed in groups of lesser rank. | |
| Infrafoliar | Borne below the leaves; e.g., the position of the inflorescence of certain Arecaceae such as, Euterpe spp. and Oenocarpus bacaba. | |
| Infundibular | Usually referring to a corolla in the shape of a funnel but can also be applied to other structures with a similar shape.See funnelform. |  |
| Inrolled | Rolled inward. | |
| Inserted | Joined to or placed on; e.g., the stamens inserted on the corolla of Rubiaceae; also refers to stamens that do not extend beyond the corolla, in that case opposite of exserted. | |
| Inside | See adaxial. | |
| Inter- | A prefix meaning between or among. | |
| Interfoliar | Borne among the leaves; e.g., the inflorescence of Attalea (Arecaceae). |  |
| Interpetiolar | Located between the petioles of two opposite leaves; e.g., the stipules of Rubiaceae. |  |
| Intra- | A prefix meaning within. | |
| Introrse | Directed inward, as the dehiscence of an anther. Compare with extrorse and latrorse. | |
| Involute | With the margin inrolled toward the adaxial surface as in the leaves of many Commelinaceae (e.g., Dichorisandra) and some Araceae such as Anthurium jenmanii. Compare with revolute and supervolute. | |
| Iridoid | Like an iris or a member of the iris family (Iridaceae). | |
| Iso- | A prefix meaning equal or like. | |
| Isodiametric | Referring to cells with equal diameters throughout; i.e., approximately spherical in shape. | |
| Isomorphic | Referring to structures or organs in species or individuals that are similar in form and size. Opposite of heteromorphic and anisomorphic. | |
| Isthmus | A thin, constricted connection between parts of an organ or structure; in the Orchidaceae referring to a narrow portion of the lip common in species of Oncidium. | |
| Keeled | Bearing a keel, same as carinate. |  |
| Labiate | Lipped; i.e., referring to plant parts that are shapped like lips; of or pertaining to the Lamiaceae (mint family). | |
| Lacerate | Torn, irregularly cut or divided, usually referring to the margin of a structure. | |
| Laciniate | Cut into narrow divisions. | |
| Lageniform | Gourd-shaped. | |
| Lamellate | Made up of small, thin plates. | |
| Lamina | The expanded portion of a leaf or other structure such as a petal; when it is a leaf the narrowed part is the petiole and when it is a petal the narrowed part is the claw. Same as blade. |  |
| Laminar | Expanded into a flattened or bladelike structure. | |
| Laminariform | Bladelike. | |
| Lanate | Woolly, usually referring to a type of pubescence. | |
| Lanceoid | Referring to a three-dimensional structure that is lance-shaped when viewed from the side (wider at the base than at the middle). |