course |
|
CHARACTER |
|
Linear pattern of the centerline through the length of an axis or vein. |
intruded |
|
placentation |
|
Upon partial septa excrescent from the wall of a compound, unilocular ovary. |
perennate |
|
duration |
structure |
Persisting in a functional state through the entire growing season. |
abortive |
|
maturation |
spore, pollen, seed |
Never attaining functional maturity due to defective or arrested development. |
fragrant |
|
odor |
|
Sweet or otherwise pleasant. |
palmatifid |
|
plane shape |
|
Palmately lobate; having three or more lobes whose longitudinal axes radiate from a common point. |
laminar 2 |
|
solid shape |
|
Relatively very thin with parallel opposite broad faces, the whole plane or variously curved. Structures to which this term, along with any other three-dimensional ones, is applicable are often also described as though only two-dimensional, using terms that are implicitly understood to refer only to the outline of the broad faces. |
floricane |
|
STRUCTURE |
|
A biennial or perennial stem after it has begun flowering, when that does not occur until at least its second season of growth; applied especially to the stems of brambles (Rubus spp.). |
ostiole |
|
STRUCTURE |
|
The distal aperture of a syconium (fig); in Ficus (Moraceae). |
gynobasic |
|
insertion |
style |
Apparently arising from the ovary base. |
cryptic |
|
coloration |
|
Similar to its natural background, from which it is not readily distinguished. |
capitulescence |
|
architecture |
|
Mode or progressive pattern of bearing capitula (heads); most appropriately described using adjectival terms; esp. in Asteraceae (Compositae). |
glomerule |
|
nominative |
inflorescence |
A compact cluster of capitula (heads), sometimes subtended by an involucre; thus, a compound capitulum (head); esp. in Asteraceae (Compositae). |
ligulate 2 |
|
architecture |
floret |
Bisexual with a zygomorphic corolla; in Asteraceae (Compositae). |
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. |
bifacial |
|
architecture |
|
Having two opposite broad surfaces that differ distinctly in appearance. |
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. |
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. |
thallus 2 pl. thalli |
|
STRUCTURE |
|
The main body of a gametophyte, bearing rhizoids, gametangia (antheridia and/or archegonia), and/or gemmae cups; usually thin and more or less planate, inconspicuous, and growing appressed to or beneath the substrate surface; in Psilotophyta, Lycopodiophyta, Equisetophyta, Polypodiophyta. See also prothallus. |
pore |
|
FEATURE |
|
A small aperture or opening in a wall or covering that allows transport between interior and exterior. |
mamillate |
|
relief |
|
Bearing mamillae. |
axillary |
|
position |
|
Within the axil; nodal and at or very close to the vertex of the distal angle between a lateral structure, especially a leaf, and the axis that bears it. |
cirrhous |
|
apex |
|
Having a narrow spiral tip that is a continuation of the central primary vein. |
eusporangiate |
|
reproduction |
|
Having relatively large sporangia each of which develops from a group of initial cells that, by periclinal divisions, give rise to an outer layer of primary cells and an inner layer of sporogenous cells; in Psilotophyta, Lycopodiophyta, Equisetophyta, and some Polypodiophyta. |
annulus 1 pl. annuli |
|
STRUCTURE |
|
A small ring-like protrusion from the strobilar stalk near its base and below the lowermost sporangiophores, sometimes bearing small sporangia; esp. in Equisetum. |