|
face |
|
FEATURE |
|
A relatively large, flat or shallowly curved portion of the external surface of a three-dimensional structure, bounded by more or less distinct topological discontinuities. |
|
paraphysis pl. paraphyses |
|
STRUCTURE |
|
An elongate, multicellular, sterile structure borne between sporangia within a sorus; in Polypodiophyta. |
|
unifacial |
|
architecture |
|
Having two opposite broad surfaces that are essentially similar in appearance. |
|
branched 2 |
|
architecture |
laminar veinlet |
Dividing within the areole, each branch ending blindly. |
|
flange |
|
STRUCTURE |
|
A relatively broad, circumferential rim or ridge that protrudes laterally. |
|
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. |
|
chaff 1 |
|
STRUCTURE |
|
Collectively, the paleae (pales, palets) sometimes borne on the receptacle of a capitulum (head) in Asteraceae (Compositae). |
|
retrorse |
|
orientation |
|
Directed generally backward, toward the proximal end of the context of reference, parallel or at an acute angle to the bearing structure. |
|
casing |
|
STRUCTURE |
|
The portion (if any) of a floral tube that is adnate to the gynoecium. See also collar, neck. |
|
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. |
|
acropetal |
|
development |
|
Proceeding toward the apex, thus more advanced basally or proximally than apically or distally within a given frame of reference. |
|
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. |
|
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. |
