collar 1 |
|
STRUCTURE |
|
The free portion (if any) of a floral tube, distal to its casing and/or neck when one or both is/are present. |
repand |
|
margin |
|
Gently or shallowly sinuate. |
pachycaulous |
|
architecture |
plant |
Having thick, more or less succulent stems. |
summer annual |
|
nominative |
plant |
Annual, germinating in spring or early summer, reproducing sexually with no prolonged vegetative stage beforehand, and dying by late summer or autumn. See also winter annual. |
muriculate |
|
relief |
|
Finely muricate. |
limb 1 |
|
STRUCTURE |
|
A relatively broad portion of a syntepalous (gamotepalous) perianth, synsepalous (gamosepalous) calyx, or sympetalous (gamopetalous) corolla distal to a narrower tube, spreading outward or ascending from the tube, comprising the distinct or connate distal portions of the tepals, sepals, or petals; except in bisexual or staminate disc florets of Asteraceae (Compositae). |
dyad |
|
STRUCTURE |
|
A pair of coherent pollen grains shed as a unit. |
course |
|
CHARACTER |
|
Linear pattern of the centerline through the length of an axis or vein. |
scarious |
|
texture |
|
Very thin, dry, and not green. |
rhytidomal |
|
insertion |
|
Within, upon, or otherwise directly associated with the bark. |
persistent |
|
duration |
structure |
Remaining attached and conspicuous until the bearing structure reaches maturity. |
emergent |
|
location |
plant, structure of aquatic plant |
Rising from beneath the water surface to a point above it. |
pubescence |
|
CHARACTER |
|
Collective aspect of trichomes borne on the surface. Many of the terms traditionally used for describing pubescence have been defined and used in so many differing and often contradictory ways that they have become hopelessly ambiguous. This is attributable mainly to overdefinition within this portion of the traditional lexicon — that is, to highly arbitrary and widely variant restriction of a term's scope to some one detailed combination of trichome character states (shape, size, orientation, etc.). By derivation these are essentially general terms, really suited only for denoting overall aspect. The diversity actually encountered in nature defies comprehensive and unambiguous resolution into any limited suite of precisely specified, mutually exclusive, complex character states that can be associated with these terms, which are best used only in their general senses. Sometimes, such description will be sufficient in itself; more often, additionally or alternatively, the various attributes of the individual trichomes should be described. This is the only strategy that allows for full description of any possible condition, including the presence of more than one type of trichome. The various terms used for describing pubescence have never been semantically consistent; in some cases they refer to the trichomes themselves, while in others they apply to the bearing surface or structure; e.g., sericeous (the trichomes themselves are collectively silky) versus barbate (the structure is bearded). See also coating, indumentum (vesture). |
cryptic |
|
coloration |
|
Similar to its natural background, from which it is not readily distinguished. |
stephanocolpate |
|
architecture |
pollen grain |
Having more than three surficial grooves (colpi) oriented meridionally. |
staminal |
|
position |
|
Upon or otherwise directly associated with the stamens. |
epiphytic |
|
habit |
plant |
Physically supported in its entirety by another plant through all or the major part of its life. |
supramedial |
|
position |
|
Just above the middle of the structure in point. |
straight |
|
course |
|
Lacking significant curves or bends. |
tubercle |
|
FEATURE |
|
A small, rounded, knot-like swelling or wart-like protrusion. |
tetrad scar |
|
FEATURE |
|
A surficial ridge or angle resulting from coherence with other spores produced from the same mother cell. |
infrafoliar |
|
insertion |
|
Upon the stem directly below a leaf insertion. |
extrorse |
|
dehiscence |
anther |
Opening outwardly, on the abaxial side. See also introrse, latrorse. |
insertion |
|
CHARACTER |
|
Mode or locus of attachment of a structure to some dissimilar bearing structure. The lexicons relating to insertion and position overlap to a great degree, since these two morphological concepts are often inseparable in practice. Also overlaps conceptually with arrangement, habit, orientation, and shape. |
disc floret |
|
STRUCTURE |
|
A floret that has an actinomorphic corolla, is bisexual, functionally staminate, or functionally pistillate, and is borne in a radiate, discoid, disciform, or radiant capitulum (head) interior (distal) to any peripheral series of differing florets that may be present; in Asteraceae (Compositae). |