|
resinous 1 |
|
coating |
|
Of liquid or hardened resin. |
|
symmetric(al) 2 |
|
architecture |
flower |
Having the perianth members in whorls that are actinomorphic and equal in number of members. |
|
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. |
|
glochidiate |
|
pubescence |
|
Bearing glochids (glochidia). |
|
mucro pl. mucrones, mucros |
|
STRUCTURE |
|
A short, hard, apical point that is a continuation of vascular tissue. See also apiculum. |
|
craspedodromous, simple- |
|
venation |
|
Having a midvein that branches to either side along the length of the lamina, the secondary veins and their branches all running toward and terminating at the margin. |
|
laesura pl. laesurae |
|
FEATURE |
|
An elongate aperture in the proximal face of a spore at or near its pole, coterminous with a tetrad scar; in Psilotophyta, Lycopodiophyta, Equisetophyta, Polypodiophyta. Depending upon tetrad configuration and resultant scar pattern, a laesura may be either unbranched or branched, the branches when present (usually 3) radiating from the pole and of approximately equal lengths. |
|
ring-porous |
|
porosity |
|
Heterogeneously porous, with macroscopically distinct concentric seasonal growth increments (rings), each with numerous large vessels toward the inside and fewer and smaller ones toward the outside. |
|
gynobasic |
|
insertion |
style |
Apparently arising from the ovary base. |
|
cuboid |
|
solid shape |
|
Generally but not strictly cubic; more or less equilaterally six-sided, each side basically square. |
|
solitary 2 |
|
habit |
plants |
Growing singly; not aggregated. |
|
thyrse |
|
nominative |
inflorescence |
An elongate, indeterminate main axis bearing numerous lateral branches, each the principal axis of a cymose subdivision. |
|
aseptate |
|
architecture |
|
Lacking internal walls or partitions (septae). |
|
circumcaulous |
|
insertion |
|
Upon and surrounding the stem. |
|
ligule 3 |
|
STRUCTURE |
|
A relatively small, attenuate, membranous, laminar enation from the adaxial surface of a leaf near its base; in Selaginella, Isoetes. |
|
filamentous |
|
texture |
|
Composed of filiform (thread-like) strands with no intervening tissue. |
|
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. |
|
secund 1 |
|
architecture |
inflorescence |
Having the pedicels oriented such that the main bodies of all the flowers lie to one side of the bearing axis. |
|
pseudopetiolate |
|
architecture |
leaf |
Having a distinctly constricted, more or less stalk-like, proximal portion that is evolutionarily derived from the blade, the original petiole reduced to the point of absence or vestigiality; esp. in Poaceae (Gramineae). |
|
floral |
|
insertion |
|
Upon, within, or associated with the flowers. |
|
collar 1 |
|
STRUCTURE |
|
The free portion (if any) of a floral tube, distal to its casing and/or neck when one or both is/are present. |
|
septifragal |
|
dehiscence |
fruit |
Splitting through the exterior wall suture(s) but not the septum(-a), the valves of the wall then separating from the septum(-a) and the locules thus opened directly to the outside. |
|
subopposite |
|
arrangement |
|
Alternate but verging on opposite. |
|
akene |
|
nominative |
fruit |
See achene. |
|
matted |
|
habit |
plants |
Growing in extensive, low, dense aggregations, sometimes with the stems of different plants intertwined. |
