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extravaginal |
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insertion |
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Distal to or outside the leaf sheath. |
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pappus pl. pappi |
|
STRUCTURE |
|
A set of one or more awns (aristae, bristles, setae) or scales at the summit of an inferior ovary just beneath or outside the free portion of the corolla; persisting in the fruit (cypsela) and often aiding wind or animal dispersal; in Asteraceae (Compositae). Considered by some to be an evolutionarily modified upper calyx portion, the lower portion having been incorporated into the floral tube casing adnate to the ovary wall; considered by others to be an outgrowth from the ovary wall. |
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persistent |
|
duration |
structure |
Remaining attached and conspicuous until the bearing structure reaches maturity. |
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vascular |
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insertion |
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Upon or otherwise directly associated with the vasculature. |
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zygomorphic |
|
architecture |
perianth, calyx, corolla |
Bilaterally symmetric; divisible into two essentially equal portions along only one median logitudinal plane. |
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gynaecium |
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STRUCTURE |
|
See gynoecium. |
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basicaulous |
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position |
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At or very near the stem base. |
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resupinate |
|
orientation |
lateral structure |
Inverted due to twisting distal to the point of insertion during development. |
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axillary |
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insertion |
|
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. |
|
haustorium pl. haustoria |
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STRUCTURE |
|
An absorbing and anchoring organ, often root-like, excrescent from a vegetative part of a parasitic or hemiparasitic plant, by which the plant communicates intimately with and derives sustenance and support from its host plant, into whose tissues the haustorium intrudes. |
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rugulose |
|
relief |
|
Slightly or finely rugose (corrugate, wrinkled). |
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hysteranthous |
|
maturation |
non-floral structure, esp. leaf |
Maturing later than the flowers. |
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ringed |
|
relief |
bark |
Fissured, mainly horizontally, with at least some of the fissures individually encircling the stem more or less completely. |
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intricate |
|
arrangement |
|
Entangled; irregularly intertwined and not readily disentangled. |
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infrabracteal |
|
insertion |
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Upon the axis directly below a bract insertion. |
|
laminar 1 |
|
insertion |
|
Upon or otherwise directly associated with the lamina (blade) of a foliaceous structure. |
|
calyx tube |
|
STRUCTURE |
|
A relatively narrow, fully connate portion of a synsepalous (gamosepalous) calyx proximal to a broader portion (limb) that comprises the distinct or connate distal portions of the sepals. |
|
coating |
|
CHARACTER |
|
Exudate that covers the surface proper. See also indumentum (vesture), pubescence. |
|
knee root |
|
STRUCTURE |
|
A specialized secondary root of a wetland tree, a portion of which projects above mean water level and appears to bend as a leg does at the knee, its distalmost portion being anchored in the substrate beneath the water. The knee of the root is commonly regarded as a conduit for gas exchange between root interior and atmosphere, a function whose need is posited on the basis of the highly anaerobic and saturated conditions prevailing in wetland substrates. |
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liguliflorous |
|
architecture |
capitulum (head) |
Bearing florets that all are bisexual and have zygomorphic corollas; in Asteraceae (Compositae). |
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sinuous |
|
course |
|
Regularly wavy in one plane, curved alternately and more or less regularly to either side. |
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centrifugal |
|
development |
|
Proceeding away from the center, thus more advanced centrally than peripherally within a given frame of reference. |
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continuous 3 |
|
architecture |
rachilla, rachis |
Not disarticulating at maturity. |
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subequal |
|
size |
equivalent structures |
Nearly uniform in extent. See also equal, unequal. |
|
circinate 2 |
|
vernation |
|
Having each leaf (frond) rolled adaxially from the sides and downward from the apex, forming a tight, flat coil; esp. in Polypodiophyta. |
