pollen |
|
STRUCTURE |
|
Collectively, the spores or grains produced within the thecae of anthers, each containing a very small microgametophyte (or its evolutionary homologue); serving as disseminules from which microgametes are released after transport to a receptive micropylar pollen droplet (in Pinophyta) or stigma (in Magnoliophyta) by a variety of vectors, notably wind, water, insects, bats, and birds. |
coma pl. comae, comas |
< tuft |
STRUCTURE |
|
A prominent single tuft of relatively long and slender, flexible, capillate trichomes; esp. from a seed, as in Asclepias (Asclepiadaceae). |
pale 2 |
= palea, palet |
STRUCTURE |
|
The upper or distal of the (usually) two distinctive bracts immediately subtending the flower in a grass (Poaceae) spikelet. |
whorl |
= cycle, series, verticil |
STRUCTURE |
|
A set of three or more lateral structures that are inserted around an axis at the same level. |
gum |
|
SUBSTANCE |
|
A highly viscous and sticky exudate that becomes more or less elastic and/or deformably solid upon drying. Overlaps conceptually with latex. |
bulb |
|
STRUCTURE |
|
A thickened underground perennating structure consisting of a stem with numerous closely proximate nodes bearing many tightly imbricate, thickened, often fleshy, foliaceous organs containing large amounts of stored food, usually in the form of starch; the whole usually enveloped and protected by imbricated scarious or fibrous foliaceous organs. |
ring-shaped |
= annular |
solid shape |
|
More or less evenly tubular in a closed circle; like a ring or doughnut. |
septal |
|
position |
|
Upon or otherwise directly associated with the septum or septa. |
androphore |
>< stalk |
STRUCTURE |
|
A stalk or tube that rises above the level of perianth insertion and bears the distinct portions of the androecium from its summit; as in Malvaceae, where the androphore is a tube formed by connation of the filaments. |
crozier |
= fiddlehead |
STRUCTURE |
|
A circinate leaf (frond) prior to full expansion, while still wholly or distally coiled; esp. in Polypodiophyta. |
craspedodromous, mixed- |
|
venation |
|
Having a midvein that branches to either side along the length of the lamina, the secondary veins running thence toward the margin, some becoming indistinct before reaching it, others terminating there. |
obterete |
|
solid shape |
|
Inversely terete. |
stoma 1 (broad sense) pl. stomata |
= stomatal apparatus, stomate |
STRUCTURE |
|
A localized functional epidermal unit consisting of a microscopic pore and two encircling specialized cells, the guard cells, which, through changes of turgor pressure in response to environmental conditions, regulate the size of the pore and thus the rates of transpiration and gas exchange through it; the whole surrounded or not by associated, cytologically distinctive epidermal cells, the subsidiary or accessory cells, which, when present, are regularly oriented in relation to it. |
axe-shaped |
= dolabriform |
solid shape |
|
Elongate, basally terete, becoming strongly compressed toward an abruptly and unilaterally broader apex; like an axe (handle plus head). |
sap |
|
SUBSTANCE |
|
Generally, the fluid content of a plant body; more precisely, the sugary fluid transported by the phloem. |
superficial |
= surficial |
position |
|
Directly upon the surface of the structure in point. |
fixation |
|
CHARACTER |
|
Mode of attachment to a supporting structure. |
one-sided 1 |
= unilateral |
architecture |
|
Having only one side, as compared with presumably equivalent, bilaterally symmetric structures. |
vestiture |
|
STRUCTURE / SUBSTANCE |
|
See vesture. |
mucous 1 |
= mucilaginous; < glutinous |
coating |
|
Of a slimy substance, or becoming so upon wetting. |
glaucescent |
< ceraceous, cereous, pruinose, waxen, waxy |
coating |
|
Becoming glaucous with age. See also caesious. |
puncticulate |
= small-dotted |
coloration |
|
Finely punctate (dotted). |
resinous 2 |
|
texture |
|
Having the consistency of resin. |
tufted 2 |
> floccose |
pubescence |
|
Of or bearing tufts of soft, fine, capillate trichomes that rub off easily. |
coriaceous |
= leathery |
texture |
|
Moderately thick, tough, and very pliable. |