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tertiary vein |
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STRUCTURE |
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A strand belonging to the third order of vasculature in a leaf or other basically laminar structure, except when that is the ultimate order (consisting of veinlets); branching from a primary or secondary vein. See also costa, lateral vein, primary vein, rib, secondary vein, veinlet. |
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disc 1 var. disk |
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STRUCTURE |
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Any distinct, annular to discoid structure produced from or borne upon a floral receptacle between or basal to any of the sets of floral organs; usually fleshy, often nectariferous. |
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endocarp |
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STRUCTURE |
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The innermost tissue layer of a pericarp. |
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eccentric |
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position |
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Having a center or axis of symmetry not coincident with that of the context of reference. |
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episepalous |
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insertion |
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Upon the sepals, or partially adnate thereto and apparently arising therefrom. |
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phyllopodium pl. phyllopodia |
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STRUCTURE |
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A stem-like axis composed of fused leaf bases; esp. in Arecaceae (Palmae), Musaceae. |
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first glume |
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STRUCTURE |
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The lower (proximal) or sometimes solitary small bract inserted at the base of a grass (Poaceae) spikelet, the second glume, when present, inserted immediately above (distal to) it. |
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pericolporate |
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architecture |
pollen grain |
Pericolpate, each groove containing a pore. |
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polyadal |
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arrangement |
pollen |
Shed in groups of more than four, each group comprising grains from two or more original tetrads, the latter intact or not. |
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craspedodromous, simple- |
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venation |
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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. |
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vallecular |
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position |
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In or otherwise directly associated with the valleculae; esp. in fruits of Apiaceae (Umbelliferae). |
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pseudoterminal |
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insertion |
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Only apparently terminal; originally subapical but displaced toward the apex by differential growth during development. |
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prolate |
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plane shape |
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Symmetrically elongate parallel to the developmental or polar axis. |
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cuboid |
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solid shape |
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Generally but not strictly cubic; more or less equilaterally six-sided, each side basically square. |
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hemiepiphytic |
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habit |
plant |
Partially epiphytic; rooted in the ground but with stems growing upon and supported mainly by other plants. |
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fusion |
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CHARACTER |
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Physical connection of equivalent or dissimilar structural entities (as recognized on evolutionary, morphological, anatomical, ontogenetic, and/or topological grounds). Terms that denote the interconnection of equivalent structures are predicated on a single collective subject and suffice in themselves to describe the condition; e.g., "sepals connate." However, those that denote the connection of dissimilar structures require explicit notation of each type of structure involved, in either a compound-subject construction or else a single-subject/object-of-preposition construction; e.g., "stamens and corolla adnate" or "stamens adnate to corolla." Qualifying detail is sometimes appropriate; e.g., "filaments connate basally," "filaments adnate to the petals over their lower halves." |
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ribbed 2 |
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solid shape |
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Having two or more prominent, elongate, relatively narrow, essentially parallel protrusions that extend over all or most of its length or circumference. |
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homogamous 1 |
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maturation |
bisexual flower |
Having the androecium and gynoecium become functionally mature concurrently. |
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internodal |
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position |
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Upon or otherwise directly associated with the internodes. |
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sawtooth |
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STRUCTURE |
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One of a series of regularly spaced, angular, marginal convexities oriented at an acute angle to the generalized perimeter of a laminar structure. See also sawtoothlet, scallop (crena), scalloplet (crenule), tooth, toothlet. |
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indusiate |
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architecture |
sorus |
Having an indusium. |
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laesura pl. laesurae |
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FEATURE |
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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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solid shape |
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CHARACTER |
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Overall three-dimensional form or aspect(s) thereof. Overlaps conceptually with architecture, arrangement, habit, insertion, orientation, position, relief, and texture (as to thickness). |
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simple 2 |
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architecture |
trichome |
Unicellular and unbranched. |
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spinulose |
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apex |
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Finely spinose. |
