semicraspedodromous |
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venation |
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Having a single median primary vein that branches to either side along the length of the lamina, each secondary vein running thence toward and bifurcate near the margin, one branch terminating at the margin, the other upwardly arcuate and merging with the superadjacent secondary vein, thus forming one of a series of marginal loops. |
sorus pl. sori |
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STRUCTURE |
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A cluster of sporangia borne upon a fertile frond, usually on its abaxial surface; often covered during maturation by a protective membrane, the indusium, that is an outgrowth from the epidermis; in Polypodiophyta. |
spadicate |
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architecture |
inflorescence |
Generally spicate but with the flowers embedded in a thick, fleshy axis, the whole subtended and usually partially or wholly enveloped by a large bract (spathe). |
aggregate fruit |
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nominative |
fruit |
Compound and derived from the two or more simple, superior ovaries of a single apocarpous flower; the ovaries connate, coherent, or contiguous in the fruit, the whole with or without accessory tissue. |
circinate 1 |
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solid shape |
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Terete and rolled downward from the apex in a tight coil. |
ligule 1 |
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STRUCTURE |
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A strap-shaped enation from or distal portion of a structure. |
conoidal |
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solid shape |
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Generally but not strictly conic. |
leaf-opposed |
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position |
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Nodal and directly opposite the leaf. |
comose |
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pubescence |
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Bearing a prominent single tuft of relatively long and slender, flexible, capillate trichomes (coma). |
mamillate |
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relief |
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Bearing mamillae. |
oblique 1 |
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base |
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Asymmetric about its longitudinal axis. |
succulent |
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texture |
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Herbaceous and juicy, often thickened (incrassate). |
discal |
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insertion |
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Upon or otherwise directly associated with the floral disc. |
ovule |
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STRUCTURE |
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A complex reproductive structure borne by a seed-plant sporophyte, consisting of outer, sporophytic tissues that enclose a haploid, gametogenic tissue usually regarded as a highly reduced megagametophyte. Following fertilization, the entire structure matures to become a seed that contains an embryo, the first stage of the next sporophytic generation. Ovules (and seeds) are borne naked on megasporophylls (in Pinophyta) or within an ovary (in Magnoliophyta). |
enlarged |
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size |
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Unusually or unexpectedly large. |
trigamous |
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reproduction |
inflorescence |
Bearing flowers of three differing sexual constitutions; esp. in Asteraceae (Compositae). |
base |
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CHARACTER |
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Configuration of the lowermost or proximal portion of a structure, its extent determined somewhat subjectively in relation to the shape of the structure as a whole. The concept of base varies from one descriptive context to another, since the base is not a clearly delimited, morphologically distinct entity. The terms for describing basal condition are not strictly coordinate logically — some are more inclusive than others, and some describe conditions involving what can be regarded as appendages — and precise characterization may require using more than one descriptor. The semantic antecedent of some descriptors is "base," whereas the antecedent of others is the structure as a whole (e.g., leaf ). |
pilosulous |
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pubescence |
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Finely pilose. |
fistulose |
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solid shape |
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Basically tubular with closed ends. |
perigynous |
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insertion |
perianth, calyx, corolla, androecium |
Having its proximal portion adnate to part of the length of the gynoecium, or fused in a separate floral cup that extends part of the length of the gynoecium, the free distal portion thus arising at a level between the base and apex of the gynoecium. See also epigynous, hypogynous. |
polygamomonoecious |
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reproduction |
taxon |
Basically monoecious but with some or all plants bearing some bisexual flowers. |
valvate 1 |
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aestivation |
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Whorled and with members not overlapping, adjacent members laterally contiguous at their margins. |
planoconvex |
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solid shape |
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Relatively thin with opposite broad faces, one plane and one convex. |
xerocleistogamous |
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reproduction |
flower |
Normally chasmogamous but facultatively cleistogamous during drier than normal periods. |
floret |
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STRUCTURE |
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A very small, structurally specialized flower, especially when occurring in capitulum (head; Asteraceae), or in a spikelet (Poaceae), where it includes the immediately subtending bracts (lemma and palea). |