pinnule |
< leaflet |
STRUCTURE |
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A second- or higher-order division or leaflet of a pinnate frond; a division of a pinna; in Polypodiophyta. |
branchlet |
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STRUCTURE |
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A branch of the highest or ultimate order. |
keel 2 |
= carina |
STRUCTURE |
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Collectively, the two relatively small, connate or coherent, abaxial (lower) petals that form the keel-like portion of a papilionaceous corolla. |
second glume |
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STRUCTURE |
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The upper (distal) member of a pair of small bracts inserted at the base of a grass (Poaceae) spikelet. |
lip |
= labium; > labellum |
STRUCTURE |
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Any substructure that resembles a lip, especially a portion of a perianth, calyx or corolla. |
palea 1 pl. paleae, paleas |
= pale, palet, receptacular bract |
STRUCTURE |
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A small papery (chartaceous) to membranous bract borne on the compound receptacle (torus) of a capitulum (head) in Asteraceae (Compositae). |
septum pl. septa |
> dissepiment, replum, trabecula |
STRUCTURE |
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A topologically and/or texturally distinct wall or partition that separates chambers or locules within an ovary, fruit or sporangium. |
pseudolamina pl. pseudolaminae |
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STRUCTURE |
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The expanded part of a phyllode (phyllodium), resembling a blade but evolutionarily derived from the petiole. |
pedicel |
< stalk |
STRUCTURE |
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The stalk, when present, of a single flower, except when the flower is solitary and deemed to represent an evolutionarily reduced compound inflorescence borne directly upon a peduncle. |
cycle |
= series, verticil, whorl |
STRUCTURE |
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A set of three or more lateral structures that are inserted around an axis at the same level. |
thorn |
= spine |
STRUCTURE |
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Any sharp, stiff, simple or branched, woody appendage having vascular tissues confluent with those of the bearing structure. "Spine" is often preferred when the appendage is homologous with a leaf or stipule, and "thorn" when it is homologous with a branch. See also prickle. |
prickle |
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STRUCTURE |
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Any unvascularized spine-like enation originating in the epidermis, cortex, or mesophyll of any shoot part. See also spine, thorn. |
squamule 1 |
= squamella; < scale |
STRUCTURE |
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A diminutive squama (lepis). |
vexillum pl. vexilla |
= banner, standard |
STRUCTURE |
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The relatively large, erect adaxial (upper) petal in a papilionaceous corolla. |
cross-vein |
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STRUCTURE |
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A relatively short, secondary or higher-order vein that runs directly between two veins of the next lower order, intersecting them more or less perpendicularly. |
carina 2 pl. carinae |
= keel |
STRUCTURE |
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Collectively, the two relatively small, connate or coherent, abaxial (lower) petals that form the keel-like portion of a papilionaceous corolla. |
lamina 2 pl. laminae |
= ray |
STRUCTURE |
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The distal, relatively flat portion of the zygomorphic corolla of a ray floret, terminating in 0--4 teeth or lobes; in Asteraceae (Compositae). |
pneumatophore |
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STRUCTURE |
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A structurally and functionally specialized root serving as an aboveground aerating organ; found in some woody taxa of wet habitats, notably some mangroves. |
macrosporocarp (not recommended) |
= megasporocarp |
STRUCTURE |
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A sporocarp that bears only macrosporangia (megasporangia). |
gynophore |
= hypogynium; < stalk, stipe (broad sense, not recommended) |
STRUCTURE |
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The basal portion of an ovary when constricted and stalk-like above the level of perianth insertion, bearing the main body of the pistil at its summit. |
paraphysis pl. paraphyses |
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STRUCTURE |
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An elongate, multicellular, sterile structure borne between sporangia within a sorus; in Polypodiophyta. |
pistil |
> carpel |
STRUCTURE |
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Any simple or compound, discrete or histologically distinct, female (ovule-producing) floral structure, or any putatively homologous sterile structure; comprising an ovary and one or more stigmas borne either directly upon the ovary or upon one or more intervening styles. See also gynoecium. |
costule |
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STRUCTURE |
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A longitudinal primary vein in a diminutive laminar structure, such as the blade of a leaflet, pinna or pinnule; a diminutive costa (rib). |
coccus pl. cocci |
= mericarp |
STRUCTURE |
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One of the segments of a dehisced schizocarp; usually one-seeded and itself indehiscent. |
spadix pl. spadices |
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STRUCTURE |
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A thick, fleshy, primary inflorescence axis bearing sessile flowers more or less sunken into its surface, the whole subtended and sometimes partially enclosed by a specialized bract, the spathe; esp. in Araceae. |