periclinal |
|
orientation |
|
Parallel to some given plane of reference; applied especially to the plane of cell division when it is oriented parallel to the generalized plane of the structural surface. |
loculicidal |
|
dehiscence |
fruit |
Splitting longitudinally through the outer wall(s) and directly into the locule(s), between the sutures, if any. |
indument |
|
STRUCTURE / SUBSTANCE |
|
See indumentum. |
sorus pl. sori |
|
STRUCTURE |
|
A cluster of sporangia borne upon a fertile frond, usually on its abaxial surface; often covered during maturation by a protective membrane, the indusium, that is an outgrowth from the epidermis; in Polypodiophyta. |
cauline |
|
position |
|
Upon, arising from, or otherwise directly associated with the stem. |
trichotomous |
|
architecture |
axis |
Branching by division of the apical meristem producing three coordinate but not necessarily equal derivatives from each division. |
obtrulloid |
|
solid shape |
|
Inversely trulloid. |
lacunate |
|
relief |
|
Having relatively large and deep depressions overall. |
craspedodromous, simple- |
|
venation |
|
Having a midvein that branches to either side along the length of the lamina, the secondary veins and their branches all running toward and terminating at the margin. |
subvalvate |
|
dehiscence |
|
Incompletely or partly valvate. |
succulent |
|
texture |
|
Herbaceous and juicy, often thickened (incrassate). |
…ciliate |
|
architecture |
|
Bearing the number of cilia indicated by the prefix. |
prothallus pl. prothalli |
|
STRUCTURE |
|
A very diminutive thallus that is reproductively mature and undergoes no further growth; in Polypodiophyta, Pinophyta. |
leaf scar |
|
FEATURE |
|
A scar on a twig or stem due to abscission of a megaphyll; having an outline like that of a transverse section through the base of the petiole, sheath, or blade that was inserted there. |
ridge |
|
FEATURE |
|
A very narrow, elongate, relatively low protrusion; esp. on fruits in Apiaceae (Umbelliferae). |
archegonium pl. archegonia |
|
STRUCTURE |
|
A female gametangium; a multicellular fertile organ of a mature gametophyte within which female gametes (eggs, ova) are produced and fertilized; having a broad, bulbous base and a narrower distal neck. Technically present but highly reduced and of no descriptive significance in Magnoliophyta. |
aciculate |
|
coloration |
|
Having fine, irregularly oriented, straight streaks of contrasting hue and/or intensity. |
sap |
|
SUBSTANCE |
|
Generally, the fluid content of a plant body; more precisely, the sugary fluid transported by the phloem. |
filament |
|
STRUCTURE |
|
The stalk, when present, of a stamen, clearly differentiated from and bearing at its summit an anther. |
bundle scar |
|
FEATURE |
|
A smaller scar within the bounds of a leaf scar at the point where a vascular bundle traversed the abscission layer between stem and leaf. |
vallecular |
|
insertion |
|
In or otherwise directly associated with the valleculae; esp. in fruits of Apiaceae (Umbelliferae). |
mesocarp |
|
STRUCTURE |
|
The middle tissue layer of the pericarp of a fruit. |
ephemeral |
|
duration |
plant |
Annual with a very short life span; germinating, growing, reproducing, and dying within a brief period of favorable conditions, the entire cycle being completed within a few weeks. |
mottled |
|
coloration |
|
Having one or more indistinctly delineated, irregularly shaped, areas of varying size and contrasting hue and/or intensity. |
muticous |
|
apex |
|
Lacking a distinct terminal point (when one might be expected). |