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accessory cell |
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STRUCTURE |
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One of the cytologically distinctive epidermal cells that are sometimes present in a stomate and that surround and are regularly oriented in relation to the guard cells. |
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lobe |
? division, segment |
STRUCTURE |
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Any generally convex, major peripheral protrusion or component sector that is delimited by concavities in the surface or margin and that is not proximally distinct from the remainder of the whole. |
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birettaform |
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solid shape |
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Approximately square in cross section and shallowly convex at the top; like a biretta (Roman Catholic cleric's hat). |
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napiform |
= turnip-shaped |
solid shape |
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Depressed-globose overall and strongly acuminate (concave-tapered) at the base; like the generalized form of a turnip. |
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caudicle |
= translator arm |
STRUCTURE |
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An attenuate end portion by which a pollinium adheres to a pollinating insect, either directly or by means of a terminal viscidium, the latter, when present, sometimes attached by an intervening stipe; esp. in Asclepiadaceae, Orchidaceae. |
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conoidal |
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solid shape |
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Generally but not strictly conic. |
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placentiform |
= placenta-shaped |
solid shape |
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Thickly disciform (discoid); like the generalized shape of a human placenta. |
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deliquescent 2 |
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texture |
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Delicately fleshy and liquifying at maturity or with pressure; e.g., petals of Tradescantia (Commelinaceae). |
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rachis 1 var. rhachis |
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STRUCTURE |
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A main or first-order axis of a compound leaf blade. |
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fixed |
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fixation |
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Attached to the bearing structure in a manner allowing no significant rotation or declination in relation to it. |
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simple-craspedodromous |
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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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goblet-shaped |
= crateriform |
solid shape |
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Having a distal, concave, relatively thin-walled, basically hemispherical portion surmounting a much narrower, transversely round, pedestal-like base. |
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…gonal |
= …angular |
plane shape |
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Having more or less straight sides of the number indicated by the prefix; as in pentagonal, trigonal. See also deltate, …gonous (…angled). |
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sterile frond |
= trophophyll |
STRUCTURE |
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A frond that does not bear sporangia; in Polypodiophyta. See also fertile frond. |
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laminar 2 |
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solid shape |
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Relatively very thin with parallel opposite broad faces, the whole plane or variously curved. Structures to which this term, along with any other three-dimensional ones, is applicable are often also described as though only two-dimensional, using terms that are implicitly understood to refer only to the outline of the broad faces. |
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…winged |
= …pterous |
architecture |
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Having the number of wings (alae) indicated by the prefix; as in 3-winged, five-winged. |
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basicaulous |
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insertion |
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At or very near the stem base. |
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capitiform |
= capitate, head-shaped |
solid shape |
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Basically globose and resembling a head in the context of occurrence. |
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opposite 2 |
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arrangement |
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Having the members of each whorl inserted directly above and/or below those of the next adjacent whorl(s). See also antipetalous, antisepalous. |
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column foot |
= mentum |
STRUCTURE |
|
A lateral, often nectariferous protrusion from the proximal portion of a column, opposite the labellum, projecting in front of the rest of the flower; in Orchidaceae. |
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phyllodium pl. phyllodia |
= phyllode |
STRUCTURE |
|
A leaf deemed to consist entirely or almost entirely of tissues evolutionarily derived from the petiole, all or a distal portion of which has become laminar, the original blade reduced to the point of absence or vestigiality. |
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cut |
= incised, lacerate, torn; > laciniate, slashed |
plane shape |
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Having straight to irregular lines of separation extending inward from the margin. See also cleft (dissected, divided, lobate, lobed, parted, partite, segmented). |
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puckered |
= blistered, bullate, pustulate |
relief |
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Having relatively coarse, irregularly disposed, rounded protrusions or convexities resembling blisters. See also papillate, papillose. |
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dusty |
= lentiginose, lentiginous |
coating |
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Covered with a more or less even deposit of minute, dry, macroscopically indistinguishable particles. See also powdery (pulverulent), which is not clearly distinct in its application. |
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rostellum 1 pl. rostella |
= beaklet |
STRUCTURE |
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A small rostrum (beak). |
