|
hermaphroditic |
= bisexual |
reproduction |
|
Having functional reproductive structures of both sexes. See also perfect. |
|
hesperidium pl. hesperidia |
= citrus fruit |
nominative |
fruit |
A berry derived from a compound ovary and having a thin, firm, leathery rind (exocarp), a thicker, white, spongy wall layer (mesocarp) internal to that, and a fleshy interior (endocarp) that constitutes the bulk of the fruit and is separable into a number of radial sections, each triangular in transsection and consisting of a thin outer membrane surrounding a mass of juicy, unicellular vescicles, among which the seeds are embedded on the adaxial side; esp. in Rutaceae. |
|
heteroblastic |
< heteromorphic |
architecture |
plant |
Having juvenile and mature leaves that differ distinctly in size and/or shape. |
|
heterocephalous |
< heteromorphic |
architecture |
capitulescence, inflorescence |
Having heads that differ distinctly in size, shape, and/or constitution. |
|
heterocladic |
< heteromorphic |
architecture |
taxon, plant |
Having stems that differ distinctly in size, shape and/or constitution, either together on the same plant at the same or different times or segregated on separate plants within the taxon. |
|
heterocolpate |
|
architecture |
pollen grain |
Having long, narrow, regularly disposed lacunae (pseudocolpi). |
|
heterogamous |
|
reproduction |
plant, inflorescence |
Having flowers that differ distinctly in size, shape and/or constitution. |
|
heteromorphic |
> heteroblastic, heterocephalous, heterocladic, heterophyllous, heterostylous |
architecture |
|
Occurring in two or more distinctly different forms within the taxon in point, at either the same or different times, in either the same or different plants. |
|
heterophyllous |
< heteromorphic |
architecture |
taxon, plant |
Having leaves that differ distinctly in size and/or shape, either on the same plant at the same or different times or segregated on separate plants within the taxon. |
|
heteropolar |
|
architecture |
pollen grain, spore |
Having morphologically evident polarity, the proximal and distal halves dissimilar. |
|
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. |
|
heterostylous |
< heteromorphic |
architecture |
taxon, plant, flower |
Having styles that differ distinctly in size and/or shape. |
|
heterotrophic |
|
nutrition |
plant |
Dependent upon other organisms for some or all of its essential nourishment, assimilating such materials either directly from the other organisms, living or dead, or from their products. |
|
hexa… |
= six-… |
prefix |
|
Indicating presence of or constitution by six entities of the type denoted by the term's stem; as in hexandrous, hexacarpellate, hexacolporate. |
|
hilum 1 pl. hila |
|
FEATURE |
|
The scar left on a seed at the point of its abscission from the funiculus. |
|
hilum 2 pl. hila |
|
FEATURE |
|
The more or less central point within a starch grain of intracellular origin, about which the successive layers of starch were accreted more or less symmetrically. |
|
hip |
|
nominative |
fruit |
Aggregate and consisting of several to many achenes enveloped by a free, urceolate, more or less fleshy, accessory structure derived from floral tube tissue; esp. in Rosa (Rosaceae). |
|
hippocrepiform |
= horseshoe-shaped |
solid shape |
|
Relatively slender and strongly compressed, the whole strongly curved over its length in a plane perpendicular to the direction of compression and forming an incomplete circle, the ends somewhat straighter than the rest and parallel or nearly so; like a horseshoe. |
|
hirsute |
|
pubescence |
|
Bearing coarse, rough, elongate, more or less erect, capillate trichomes. See also hirtellous. |
|
hirtellous |
|
pubescence |
|
Finely hirsute. |
|
hispid |
= setose; < bristly |
pubescence |
|
Bearing relatively long and slender, more or less straight, terete, fine-pointed, stiff trichomes. See also hispidulous (setulose, small-bristly). |
|
hispidulous |
= setulose, small-bristly |
pubescence |
|
Finely hispid (setose). |
|
hoary |
= canescent |
pubescence |
|
Densely covered with gray, fine, relatively short, capillate trichomes. |
|
hollow |
= excavate(d) |
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. |
|
homochlamydeous |
|
architecture |
flower |
Having a perianth undifferentiated into distinct proximal and distal envelopes (calyx and corolla); composed of tepals, all essentially alike. |
