Displaying 1 - 33 out of 33 Object(s)
| Term | Definition | |
|---|---|---|
| Higher order leaf venation | Referring to venation levels in the leaves above the tertiary veins. | |
| Higher order venation | All venation smaller in diameter than tertiary venation. |  |
| 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). |  |
| Leaf venation cladodromous | Referring to a type of leaf venation in which the secondary veins branch freely before they reach the margin. Based on Hickey, 1973. For more information about leaf venation see Ellis et al, 2009. |  |
| Leaf venation eucamptodromous | Referring to a type of leaf venation in which the secondary veins do not reach the margin and do not form a series of prominent arches. Based on Hickey, 1973. For more information about leaf venation see Ellis et al, 2009. |  |
| Leaf venation eucamptodromous | Secondaries upturned and gradually diminishing apically inside the margin but not connecting to the secondary above it. Based on (Hickey, 1973. For more information about leaf venation see Ellis et al. (2009). |  |
| Leaf venation flabellate | Referring to leaf venation with several to many fine basal veins that spread out from the base like a fan and divide somewhat toward the apex. Based on Ellis et al., 2009. |  |
| Leaf venation hyphodromous | Referring to a leaf blade with all but the midvein absent or not visible because the leaf blade is too fleshy for them to be seen. |  |
| Leaf venation imperfect acrodromous | Referring to a type of leaf venation in which two or more primary or strongly developed secondary veins arch upward from or above the base and do not converge at the apex. Based on Hickey, 1973. For more information about leaf venation see Ellis et al, 2009. |  |
| Leaf venation mixed craspedodromous | Referring to a type of leaf venation in which some of the secondary veins terminate at the leaf margins and the remainder of the secondary veins do not, e.g. half of the secondary veins are craspedodromous and the other half camptodromous. |  |
| Leaf venation perfect acrodromous | Referring to a type of leaf venation in which two or more primary or strongly developed secondary veins arch upward from the base or above the base and converge near the apex. Based on Hickey, 1973. For more information about leaf venation see Ellis et al, 2009. | |
| Leaf venation reticulodromous | Referring to a leaf venation type in which the secondary veins form a network of veins soon after departing from the midrib. Based on Hickey, 1973. For more information about leaf venation see Ellis et al, 2009. | |
| Leaf venation simple craspedodromous | Referring to a type of leaf venation in which all of the secondary veins terminate at the leaf margins. |  |
| Leaf venation suprabasal acrodromous | Referring to a type of leaf venation in which two or more primary or strongly developed secondary veins arch upward from above the base. Based on Hickey, 1973. For more information about leaf venation see Ellis et al, 2009. | |
| Leaf venation suprabasal actinodromous | Referring to a type of leaf venation in which three or more primary veins diverge radially from a single point above the point of attachment of the petiole. |  |
| Parallel venation | Generally applied to secondary or higher-order veins that are parallel to each other and to the margins of the leaf, sepal, or petal in which they occur but in monocots they are often numerous primary veins of the same size. |  |
| Percurrent tertiary venation | Tertiaries from the opposite secondaries joining (Hickey, 1973) |  |
| Pinnate venation | A type of venation pattern in which the secondary veins run parallel to each other from the midrib toward the margin. | |
| Primary venation | The largest (in diameter) vein (e.g., in camptodromous venaton) or veins (e.g., in actindodromous venaton) in a leaf blade. Same as midrib. | |
| Reticulate tertiary venation | Tertiary venation anastomosing with other tertiary veins or with the secondary veins (Hickey, 1973) |  |
| Reticulate venation | Referring to the venation of a leaf which forms a network. |  |
| Secondary venation | The second order of venation in a leaf blade, i.e., the veins that arise from the midrib. | |
| Tertiary venation | The third degree or third smallest veins in a leaf blade, arising from the secondary veins. | |
| Venation | The network or pattern of vascular tissue (veins) in a leaf or other organ. |