radiant 1 |
|
architecture |
capitulum (head) |
Bearing one or more peripheral series of florets that are bisexual, pistillate, or neuter and that have relatively large actinomorphic corollas, and one or more central series of usually bisexual florets that have relatively small actinomorphic corollas; in Asteraceae (Compositae). |
rhachilla |
|
STRUCTURE |
|
See rachilla. |
heterosporous |
|
reproduction |
taxon |
Producing two types of spore, microspore and megaspore, which are sexually distinct and usually different in size, each megaspore giving rise to a megagametophyte, each microspore to a microgametophyte. |
rectangular |
|
plane shape |
|
Basically four-sided, the sides more or less straight, those of each opposing pair more or less parallel, the generalized angles between adjacent sides approximately 90°. |
inaperturate |
|
architecture |
pollen grain |
Lacking an aperture of any type. |
husk |
|
STRUCTURE |
|
A more or less dry, hard or fibrous, simple or compound enclosure or outer layer of a seed, fruit or inflorescence. |
apolar |
|
architecture |
pollen grain, spore |
Lacking morphologically evident polarity. |
secund 1 |
|
architecture |
inflorescence |
Having the pedicels oriented such that the main bodies of all the flowers lie to one side of the bearing axis. |
involucre 2 |
|
STRUCTURE |
|
One or more closely proximate whorls, or a compact spiral, of bracts (phyllaries) surrounding (proximal to) the compound receptacle (torus) and florets of a capitulum (head); in Asteraceae (Compositae). |
barbellate |
|
architecture |
|
Bearing one or more barbels. |
shoot 1 |
|
STRUCTURE |
|
Collectively, all those portions of a plant body that are anatomically distinct from the root, the component axes differentiated into nodes and internodes, and branching exogenously from the former. |
septifragal |
|
dehiscence |
fruit |
Splitting through the exterior wall suture(s) but not the septum(-a), the valves of the wall then separating from the septum(-a) and the locules thus opened directly to the outside. |
lumen pl. lumina |
|
FEATURE |
|
A space enclosed by the wall(s) or membrane(s) of a structure. |
spicate |
|
architecture |
inflorescence |
Comprising one or more spikes. |
costal |
|
position |
|
Upon or otherwise directly associated with the costa(e) of a laminar structure. |
acroscopic |
|
orientation |
subordinate structure |
Directed, facing, or pointing ("looking") toward the apex of the bearing structure. |
lineolate 1 |
|
coloration |
|
Finely lineate, the lines short and often irregularly oriented. |
microphyllous |
|
architecture |
plant |
Bearing microphylls. |
cyathium pl. cyathia |
|
nominative |
inflorescence |
Resembling a single flower, the unbranched axis very short with a terminal pistillate flower and several lateral staminate flowers, the whole subtended and to some degree enclosed by a cupulate envelope of bracts, the flowers diminutive and presumed to be evolutionarily reduced; characteristic of Euphorbia. |
maturation |
|
CHARACTER |
|
Timing of the attainment of functional maturity, sometimes relative to other structures, sometimes as to constituent structures relative to each other. |
androgynecandrous |
|
reproduction |
taxon |
Monoecious, each inflorescence having distal and proximal sectors with only staminate flowers and between them a central sector with only pistillate ones. |
subpetiolar |
|
insertion |
|
Just below the point of petiole insertion. |
diffuse |
|
architecture |
plant, stem |
Having branches remote and divergent to divaricate. |
symmetric(al) 1 |
|
plane shape |
|
Divisible into essentially equal halves along one or more lines or planes. |
clambering |
|
habit |
plant, axis |
Reclining upon and spreading across other plants or objects without the aid of special holding structures or growth patterns. |