circumscissile |
|
dehiscence |
|
Splitting transversely through the exterior wall about its entire circumference, the resulting upper cap-like portion falling away. |
prop-rooted |
|
architecture |
plant |
Bearing and buttressed by prop roots. |
cirrhous |
|
apex |
|
Having a narrow spiral tip that is a continuation of the central primary vein. |
porosity |
|
CHARACTER |
|
Presence and disposition of vessels (pores) in wood (xylem). |
rachis 1 var. rhachis |
|
STRUCTURE |
|
A main or first-order axis of a compound leaf blade. |
gynodioecious |
|
reproduction |
taxon |
Having some plants with only bisexual flowers and some with only pistillate ones. |
retrorse |
|
orientation |
|
Directed generally backward, toward the proximal end of the context of reference, parallel or at an acute angle to the bearing structure. |
heterogamous |
|
reproduction |
plant, inflorescence |
Having flowers that differ distinctly in size, shape and/or constitution. |
receptacular |
|
position |
|
Upon, arising from, or otherwise directly associated with the receptacle. |
second glume |
|
STRUCTURE |
|
The upper (distal) member of a pair of small bracts inserted at the base of a grass (Poaceae) spikelet. |
inframedial |
|
position |
|
Slightly below the middle of the structure in point. |
sheathing 1 |
|
architecture |
foliaceous structure |
Differentiated into distinct proximal and distal portions, the former terete or involute and closely enclosing the bearing axis above the point of insertion. |
septal |
|
position |
|
Upon or otherwise directly associated with the septum or septa. |
longitudinal 2 |
|
orientation |
|
Parallel to the long axis of the context of reference. |
linear 1 |
|
arrangement |
bundle scars |
Disposed in a more or less straight line. |
stephanocolporate |
|
architecture |
pollen grain |
Stephanocolpate, each groove containing a pore. |
contractile |
|
architecture |
structure |
Diminishing in length, or acquiring the potential energy for a sudden decrease, due to the generation of internal tension during tissue development. |
mesocarp |
|
STRUCTURE |
|
The middle tissue layer of the pericarp of a fruit. |
cuspidate |
|
apex |
|
Tapering gradually to a rigid tip composed of both vascular and laminar tissues. |
marginal |
|
position |
|
Upon or otherwise directly associated with the margins. |
submergent |
|
location |
structure of aquatic plant |
Descending from above the water surface to a point beneath it. |
base |
|
CHARACTER |
|
Configuration of the lowermost or proximal portion of a structure, its extent determined somewhat subjectively in relation to the shape of the structure as a whole. The concept of base varies from one descriptive context to another, since the base is not a clearly delimited, morphologically distinct entity. The terms for describing basal condition are not strictly coordinate logically — some are more inclusive than others, and some describe conditions involving what can be regarded as appendages — and precise characterization may require using more than one descriptor. The semantic antecedent of some descriptors is "base," whereas the antecedent of others is the structure as a whole (e.g., leaf ). |
cross-vein |
|
STRUCTURE |
|
A relatively short, secondary or higher-order vein that runs directly between two veins of the next lower order, intersecting them more or less perpendicularly. |
neck (archegonial) |
|
STRUCTURE |
|
The distal narrowed portion of an archegonium above its bulbous base. |
dichotomous |
|
architecture |
axis |
Branching by division of the apical meristem producing two coordinate but not necessarily equal derivatives from each division. |