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tepal |
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STRUCTURE |
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Any member of an undifferentiated perianth; may be green and foliaceous or colored and petaloid, distinct or else connate with one or more others, and/or free or else adnate with one or more other floral structures. |
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pale 2 |
= palea, palet |
STRUCTURE |
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The upper or distal of the (usually) two distinctive bracts immediately subtending the flower in a grass (Poaceae) spikelet. |
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husk |
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STRUCTURE |
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A more or less dry, hard or fibrous, simple or compound enclosure or outer layer of a seed, fruit or inflorescence. |
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tuberoid (root-stem) |
= dropper |
STRUCTURE |
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An axial outgrowth that descends from a bulb and eventually forms a new bulb; esp. in Orchidaceae. |
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culm |
< cane, stem |
STRUCTURE |
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A stem of a sedge (Cyperaceae) or grass (Poaceae), usually hollow. Use of this term or cane instead of stem is a matter of tradition and preference, not of descriptive precision or necessity. |
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pseudostem |
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STRUCTURE |
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A structure that resembles a stem but is not part of the axial system of a shoot, lacking anatomical differentiation into nodes and internodes. |
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squamella 1 pl. squamellae |
= squamule; < scale, trichome |
STRUCTURE |
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A diminutive squama (lepis). |
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vesicle |
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STRUCTURE |
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A small bladder-like part consisting of an enclosing wall or covering and an empty or fluid-filled interior, sometimes turgid; esp. in citrus fruits (hesperidia). |
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primary stem |
= main stem; > bole, trunk |
STRUCTURE |
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The one, or any of the more than one, first-order stem(s), or first-order portion(s) of the collective stem, of a shoot. |
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seed coat |
= testa |
STRUCTURE |
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The outer protective layer of a seed, developed from the ovular integument(s). |
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ligule 4 |
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STRUCTURE |
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The distal, relatively flat portion of the zygomorphic corolla of a ligulate floret, terminating in 5 teeth or lobes; in Asteraceae (Compositae). |
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areole 2 |
= areola |
STRUCTURE |
foliaceous structure |
Any distinguishable laminar portion bounded on all sides by anastomosing veins and not traversed or dissected by any vasculature other than veinlets. |
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macrosporangium pl. macrosporangia (not recommended) |
= megasporangium |
STRUCTURE |
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A sporangium that produces megaspores. |
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bracteole 2 |
= bractlet, prophyll(um); < bract |
STRUCTURE |
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A second- or higher-order bract within, and subtending some portion of, an aggregate branching structure, especially when subtending a flower. |
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chalaza pl. chalazae, chalazas |
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STRUCTURE |
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The basal (proximal) portion of an ovule, adjacent to its junction with the funiculus. |
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pollen sac |
= theca |
STRUCTURE |
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Any of the one, two or four ontogenetically distinct, pollen-producing sectors (microsporangia) of an anther. In some taxa the walls between pairs of adjacent thecae break down as an anther approaches maturity, the mature anther thus ultimately containing half as many locules as thecae. |
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raphe |
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STRUCTURE |
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That portion of the funicle adnate to the integument of an anatropous ovule; represented by a longitudinal ridge or other discontinuity in the surface and/or color of the testa on one side of the mature seed. |
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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). |
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glochidium pl. glochidia |
= glochid; < bristle, capillus, hair, seta, trichome |
STRUCTURE |
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A capillus (hair) or bristle (seta) that bears one or more barbs; esp. in Cactaceae. |
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barbellula pl. barbellulae |
= barbellule |
STRUCTURE |
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A small barbel (barbella); a very diminutive barb. |
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cane |
< culm, stem |
STRUCTURE |
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A woody, aboveground culm. Use of this term or culm instead of stem is a matter of tradition and preference, not of descriptive precision or necessity. |
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root 1 |
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STRUCTURE |
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Collectively, all those portions of a plant body that are anatomically distinct from the shoot, the component axes not differentiated into nodes and internodes, and branching endogenously. |
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squamella 2 pl. squamellae |
= squamule; < scale |
STRUCTURE |
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A small, dry bract borne on the compound receptacle (torus) of a capitulum (head); in Asteraceae (Compositae). |
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isthmus |
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STRUCTURE |
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A narrower portion connecting two wider or broader portions of an inclusive structure. |
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obovoid |
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solid shape |
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Inversely ovoid (egg-shaped). |
