|
exstipitate |
= sessile, stalkless, unstalked |
architecture |
structure |
Lacking a stalk, thus inserted ("sitting") directly upon the bearing structure. |
|
exsert(ed) |
|
position |
anther, style |
Protruding beyond the floral envelope. See also included. |
|
explosive |
|
dehiscence |
|
Opening abruptly with almost instantaneous aperture formation and release of accumulated structural tensions, the contents thus forcibly expelled. |
|
exogamous |
= allogamous, allomictic, cross-fertilizing, xenogamous |
reproduction |
taxon |
Having fertilization regularly involving gametes derived from different plants. |
|
exocarp |
= epicarp |
STRUCTURE |
|
The outermost tissue layer of a pericarp. |
|
exindusiate |
|
architecture |
sorus |
Lacking an indusium. |
|
exfoliating |
|
relief |
bark |
Shallowly and distantly fissured, falling away in thin, relatively large patches or sheets. |
|
excurrent |
|
architecture |
axis, laminar vein |
Branching laterally such that the initial axis retains its prominence over the length of the structure, the succesive orders of branches relatively smaller. See also deliquescent. |
|
excavate(d) |
= hollow |
architecture |
axis |
Having pith tissue absent or disintegrating prior to axial maturity, resulting in an uninterrupted cavity running the length of the axis. Semantically, this term and its synonym refer to the axis, not to the pith itself, although the latter application has been traditional. |
|
exalate 2 |
= wingless |
architecture |
pollen grain |
Lacking lateral lobes or enations that resemble sacs or somewhat inflated wings. |
|
exalate 1 |
= wingless |
architecture |
|
Lacking elongate, relatively thin protrusions or appendages that resemble wings. |
|
evergreen |
|
habit |
plant |
Perennial and bearing some viable leaves at all times during the yearly cycle. |
|
evening-blooming |
= vespertine |
habit |
flower |
Opening during the evening. |
|
even-pinnate |
= paripinnate |
architecture |
foliaceous structure |
Compound with each order pinnate and comprising an even number of members, none truly terminal. |
|
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. |
|
eucamptodromous |
|
venation |
|
Having a single median primary vein that branches to either side along the length of the lamina, the secondary veins upwardly arcuate, gradually becoming indistinct interior to the margin, and serially interconnected by cross-branches without formation of marginal loops. |
|
estipulate |
= exstipulate |
architecture |
leaf |
Lacking stipules. |
|
erose 2 |
= eroded |
relief |
|
Appearing as if chewed or gnawed; having very irregular localized deviations from its generalized line. |
|
erose 1 |
|
margin |
|
Having rough, very irregular depressions throughout. |
|
eroded |
= erose |
relief |
|
Having rough, very irregular depressions throughout. |
|
erect |
|
orientation |
|
Perpendicular to the horizon or to the general plane of a bearing structure. |
|
eramous |
= unbranched |
architecture |
axis, laminar vein |
Not branching at any point. |
|
eradicate |
= rootless |
architecture |
plant |
Lacking a root. |
|
equitant |
|
arrangement |
|
Alternate, distichous, basal, and congested, each conduplicate with its lateral edges overlapping and/or overlapped by those of the immediately adjacent one(s). |
|
equatorial ridge |
|
FEATURE |
|
A circumferential ring about a megaspore in the plane of its equator, raised above the remainder of the wall surface; in some heterosporous taxa of Polypodiophyta. |
