coherent |
|
fusion |
equivalent structures |
Joined superficially, with no significant histological continuity. |
scar |
|
FEATURE |
|
A discontinuity in surface color and/or relief due to abscission of a structure formerly borne there. |
tuberous 2 |
|
architecture |
structure |
Resembling a tuber in shape and texture, but not ontogenetically such; esp. roots. |
determinate |
|
development |
|
Having the terminal (central, apical, or distal) portion differentiating first and the lateral (peripheral, basal, or proximal) portions later, development thus proceeding sequentially downward or outward, growth of the whole thereby organizationally limited. |
concentric |
|
position |
|
Having a center or axis of symmetry coincident with that of the context of reference. |
involute 2 |
|
vernation |
|
Each rolled adaxially from the lateral margins. |
levering |
|
habit |
trichome |
Forming part of a pappus and reflexing at maturity, thus helping to loosen the individual fruit (cypsela) from the capitulum (head); in Asteraceae (Compositae). |
dichasium pl. dichasia |
|
nominative |
inflorescence |
Determinate and falsely dichotomous with each axial segment bearing a sessile terminal flower and either a pair of opposite pedicellate lateral flowers or a pair of opposite lateral branches. See also cincinnus, cyme, cymule, helicoid cyme, monochasium, scorpioid cyme. |
square |
|
plane shape |
|
Equilaterally rectangular. |
anthela pl. anthelae |
|
nominative |
inflorescence |
A cyme with the main axis markedly shorter than the lateral axes, appearing generally paniculate when compound; esp. in Juncaceae. |
asymmetric(al) 2 |
|
architecture |
flower |
Having the perianth members in whorls that are irregular and/or unequal in number of members. |
laminate |
|
architecture |
foliaceous structure |
Having an expanded, more or less planate, distal portion (lamina or blade). |
…adelphous |
|
architecture |
flower, androecium |
Having two or more distinct sets of stamens, the sets differing from one another in the arrangements, insertions, positions and/or morphologies of the included stamens, the number of sets indicated by the prefix, at least one set with two or more members; as in diadelphous, monadelphous, triadelphous. |
polygamomonoecious |
|
reproduction |
taxon |
Basically monoecious but with some or all plants bearing some bisexual flowers. |
appressed |
|
orientation |
lateral structure |
Angled at or near the base and closely flattened against the surface of the bearing structure, thus more or less parallel to it. |
muticous |
|
apex |
|
Lacking a distinct terminal point (when one might be expected). |
ovule |
|
STRUCTURE |
|
A complex reproductive structure borne by a seed-plant sporophyte, consisting of outer, sporophytic tissues that enclose a haploid, gametogenic tissue usually regarded as a highly reduced megagametophyte. Following fertilization, the entire structure matures to become a seed that contains an embryo, the first stage of the next sporophytic generation. Ovules (and seeds) are borne naked on megasporophylls (in Pinophyta) or within an ovary (in Magnoliophyta). |
solitary 1 |
|
arrangement |
|
Disposed singly, each remote from any others. |
barbed 2 |
|
solid shape |
|
Having one or more relatively short, stiff, acutely inserted or bent, antrorse or retrorse, terminal and/or lateral hook-like appendages; esp. awns or setae. |
simple-craspedodromous |
|
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. |
pterocaulous |
|
architecture |
plant |
Having alate (winged) stems. |
non-porous |
|
porosity |
|
Lacking vessels, the tracheary elements limited to tracheids and, sometimes, fiber-tracheids. |
spinulose |
|
margin |
|
Finely spinose. |
resinous 1 |
|
coating |
|
Of liquid or hardened resin. |
raphides sing. raphis |
|
STRUCTURE |
|
Needle-like crystals of calcium oxalate contained within the cells of some plants; esp. in Araceae. |