Displaying 41 - 60 out of 80 Object(s)
| Term | Definition | |
|---|---|---|
| Leaf margin doubly serrate | Leaf blades with margins with sharp teeth oriented toward the apex with each touth in turn with a smaller tooth. |  |
| Leaf margin entire | Referring to leaf blade margins that are smooth, i.e., they have no serrations or crenations. |  |
| Leaf margin erose | Referring to leaf blade margin that is jagged, i.e., uneven but not with well-defined teeth. | |
| Leaf margin lobed | Referring to rounded projections arising from the margins of a leaf blade that are cut less than one-half the distance to the midrib of the leaf blade, e.g., the leaves of the white oak group. | |
| Leaf margin serrate | Leaf blades with margins with sharp teeth oriented toward the apex. | |
| Leaf opposed | Referring to an inflorescence, infructescence, or tendril arising from the stem opposite a leaf. |  |
| Leaf scar | The scar left on a stem when a leaf falls. |  |
| Leaf sheath | Tubular, inrolled base of a leaf blade or petiole that surrounds the node and a portion of the internode; e.g., in the Cyperaceae, Poaceae, and many other monocotyledons as well as in some dicotyledons. |  |
| Leaf symmetrical | Referring to the form of a leaf with the blade equal on each side of the midrib. |  |
| Leaf symmetry | Referring to the form of a leaf in relation to the midrib, if the blade on each side of the midrib is equal the leaf is symmetrical and if the blades on each side of the midrib are not equal the leaf is asymmetrical. | |
| Leaf venation acrodromous | Referring to a type of leaf venation in which two or more primary or strongly developed secondary veins arch upward from either the base or above it; perfect acrodromous is used when these veins converge near the apex; e.g., Strychnos (Loganiaceae); imperfect acrodromous is used when these veins do not converge at the apex. Based on Hickey, 1973. For more information about leaf venation see Ellis et al, 2009. |  |
| Leaf venation actinodromous | Referring to a type of leaf venation in which three or more primary veins diverge radially from a single point either at (basal actinodromous) or above (suprabasal actinodrmous) the point of attachment of the petiole. The primary veins can either converge at the apex (perfect actinodromous) or not converge at the apex (imperfect actinodromous). Based on Hickey, 1973. For more information on leaf venation see Ellis et al., 2009. |  |
| Leaf venation basal acrodromous | Referring to a type of leaf venation in which two or more primary or strongly developed secondary veins arch upward from the base and converge at or close to the apex.. Based on Hickey, 1973. For more information about leaf venation see Ellis et al, 2009. |  |
| Leaf venation basal actinodromous | Referring to a type of leaf venation in which three or more primary veins diverge radially from a single point at point of attachment of the petiole. | |
| Leaf venation brochidodromous | Referring to a type of leaf venation in which the secondary veins do not terminate at the margin but join to form a series of prominent arches that form a submarginal nerve; for example, in many Myrtaceae. Based on Hickey, 1973. For more information about leaf venation see Ellis et al, 2009. |  |
| Leaf venation brochidodromous | Secondaries joined together in a series of prominent arches. Based on Hickey, 1973. For more information abouit leaf venation see Ellis et al, 2009. | |
| Leaf venation brochidodromous festooned | Referring to a type of leaf venation in which the secondary veins do not terminate at the margin but join to form a series of prominent arches that form a submarginal nerve and, in addtion, the secondary veins possess closed loops toward their apices. Based on Hickey, 1973. For more information about leaf venation see Ellis et al, 2009. |  |
| Leaf venation camptodromous | Referring to a type of leaf venation in which the secondary veins do not terminate at the margin; in one type each secondary vein connects with the seconday vein above it (brochidodromous) and in the other type the secondary veins do not connect with the secondary vein above it (eucamtodromous). Based on Hickey, 1973. For more information about leaf venation see Ellis et al, 2009. | |
| Leaf venation camptodromous | A type of leaf venation in which the secondary veins do not terminate at the margens |  |
| Leaf venation campylodromous | Referring to a type of leaf venation in which a series of more or less equal primary veins originate from a common point at the base, arch upward, and reunite toward the apex; e.g., species of Aristolochia (Aristolochiaceae). |  |