antheridium pl. antheridia |
|
STRUCTURE |
|
A male gametangium; a multicellular fertile organ of a mature gametophyte within which male gametes (antherozoids, spermatozoids) are produced and from which they are discharged, in some taxa forcibly, through a pore. Technically present but highly reduced and of no descriptive significance in Magnoliophyta and part of Pinophyta. |
dendritic |
= tree-like |
architecture |
|
Like the branched axial structure of a tree. |
…ranked |
= …stichous |
arrangement |
|
Disposed along the axis in the number of distinct ranks indicated by the prefix; as in two-ranked. |
exocarp |
= epicarp |
STRUCTURE |
|
The outermost tissue layer of a pericarp. |
mucous 2 |
= mucilaginous; < glutinous |
texture |
|
Slimy. |
viscin |
= elastoviscin |
SUBSTANCE |
|
A sticky, elastic material, especially that forming the threads that sometimes connect pollen grains. |
gynandrium pl. gynandria |
= column, gynostemium |
STRUCTURE |
|
A central floral structure consisting of the partly to wholly fused (connate and adnate) androecium and gynoecium; esp. in Orchidaceae. |
spiral 3 |
= helical |
course |
|
Curving with constant or regularly increasing radius from one end to the other through three dimensions. |
contortuplicate 1 |
= torsive |
aestivation |
|
Plicate and contorted. |
linear 2 |
|
plane shape |
|
Elongate and narrow with the sides more or less straight and parallel over most of its length. |
trumpet-shaped |
= tubiform |
solid shape |
|
Obteretely tubular with a relatively short distal flare (the limb if a perianth, calyx, or corolla). |
rugose |
= corrugate, wrinkled |
relief |
|
Having irregular, narrow ridges or creases, the intervening areas flat to shallowly concave or convex, appearing overall as though crumpled and then spread out. See also rugulose. |
floral |
|
position |
|
Upon, within, or associated with the flowers. |
ocrea pl. ocreae var. ochrea |
|
STRUCTURE |
|
A tubular sheath that encircles a stem at a node, subtending a petiole; thought to have arisen evolutionarily by lateral fusion of two stipules; in Polygonaceae. |
calyptra pl. calyptrae |
|
STRUCTURE |
|
A distal hood- or lid-like portion that detaches as a unit from the remainder of the structure; esp. in some Papaveraceae the unopened calyx that separates from the rest of the flower at anthesis. |
hook-shaped |
= unciform |
solid shape |
|
Very slenderly elongate with a more or less straight proximal portion and a recurved terminal portion, the whole resembling a hook. |
straight |
|
course |
|
Lacking significant curves or bends. |
pyrene 2 |
= stone |
STRUCTURE |
|
The hard seed of a drupelet; esp. in Rosaceae. |
microsporangium pl. microsporangia |
|
STRUCTURE |
|
A sporangium that produces microspores. |
velum pl. vela |
|
STRUCTURE |
|
A membranous adaxial flap or fold of vegetative tissue wholly or partly covering the sporangial cavity of a sporophyll; in Isoëtaceae. |
globose |
= globular, orbicular, rotund, spheric(al), spheroid(al) |
solid shape |
|
Uniformly convex, circular in any median section and in outline when viewed from any angle; like a globe or sphere. |
spathe |
|
STRUCTURE |
|
A usually relatively large, sometimes showy, foliose bract subtending and sometimes partially enclosing an inflorescence, esp. a spadicate one; in Liliidae (monocotyledons). |
…partite |
? …cleft, …fid, …lobate, …lobed, …parted, …segmented |
plane shape |
|
Having the number of lobes, divisions or segments indicated by the prefix; as in tripartite. |
symmetric(al) 1 |
|
plane shape |
|
Divisible into essentially equal halves along one or more lines or planes. |
distal |
> apical |
position |
|
Upon or associated with the portion of a structure farthest from its developmental origin. |