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androdioecious |
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reproduction |
taxon |
Having some plants with only bisexual flowers and others only staminate ones. |
|
microspore |
|
STRUCTURE |
|
A male spore; a spore of the smaller of the two types produced by the sporophytes of a heterosporous taxon; produced in a microsporangium; giving rise upon germination to a microgametophyte. |
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rank |
|
FEATURE |
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A sequence of lateral structures arising from the same axis at successive points along its length and diverging from it in the same direction. |
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superaxillary |
|
insertion |
|
Internodal but close to and directly above the axil(s). |
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calyptrate |
|
architecture |
|
Having or constituting a calyptra. |
|
isostemonous |
|
architecture |
flower, androecium |
Having the stamens essentially alike in size and shape. |
|
persistent |
|
duration |
structure |
Remaining attached and conspicuous until the bearing structure reaches maturity. |
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smooth 1 |
|
relief |
|
Even or unrelieved overall. Strictly applied, this term refers only to the surface proper; however, it is often used to mean glabrous as well. |
|
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. |
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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. |
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resinous 1 |
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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. |
|
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. |
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gynobasic |
|
insertion |
style |
Apparently arising from the ovary base. |
|
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. |
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cuboid |
|
solid shape |
|
Generally but not strictly cubic; more or less equilaterally six-sided, each side basically square. |
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solitary 2 |
|
habit |
plants |
Growing singly; not aggregated. |
|
aseptate |
|
architecture |
|
Lacking internal walls or partitions (septae). |
|
thyrse |
|
nominative |
inflorescence |
An elongate, indeterminate main axis bearing numerous lateral branches, each the principal axis of a cymose subdivision. |
|
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. |
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filamentous |
|
texture |
|
Composed of filiform (thread-like) strands with no intervening tissue. |
|
banded |
|
coloration |
|
Broadly striped; having one or more elongate, relatively broad and, when multiple, more or less parallel, areas of contrasting hue and/or intensity. |
