ray 1 |
< primary axis |
STRUCTURE |
|
A first-order axis within a compound umbel. |
megasporophyll |
= macrosporophyll (not recommended); > carpel, cone scale, ovuliferous scale |
STRUCTURE |
|
A sporophyll that bears only megasporangia and, in Pinophyta, naked ovules that develop subsequently. |
lamella pl. lamellae |
|
STRUCTURE |
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A thin layer of tissue that forms a plate within tissue of lesser density or between areas of empty space. |
nectary |
< gland |
STRUCTURE |
|
A multicellular, anatomically distinct structure that produces and exudes nectar. |
throat 1 |
|
STRUCTURE |
|
The far distal portion of a perianth, calyx, or corolla tube, or of a leaf sheath, surrounding the orifice of the tube or sheath, sometimes constricted relative to the diameter of the main body of the tube or sheath; except in disc florets of Asteraceae (Compositae). |
female cone |
= macrostrobilus (not recommended), megastrobilus |
STRUCTURE |
|
A cone (strobilus) whose fertile organs are all megasporophylls. |
bractlet 1 |
= bracteole; < bract |
STRUCTURE |
|
A diminutive bract, or a bract that is smaller than others present. |
culm |
< cane, stem |
STRUCTURE |
|
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. |
prickle |
|
STRUCTURE |
|
Any unvascularized spine-like enation originating in the epidermis, cortex, or mesophyll of any shoot part. See also spine, thorn. |
tendril |
|
STRUCTURE |
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A slender stem branch, modified leaf, or portion of a leaf that twines about a supporting structure. |
fringe |
= fimbria |
STRUCTURE |
|
A marginal series or cycle of regular, slender, closely adjacent, more or less flexible segments or protrusions, when treated as an aggregate structure. |
peduncle |
<stalk, stipe (broad sense, not recommended) |
STRUCTURE |
|
The common stalk, when present, of a compound inflorescence or first-order subunit thereof, or of a solitary flower that is deemed to represent an evolutionarily reduced compound inflorescence. |
macrospore (not recommended) |
= megaspore |
STRUCTURE |
|
A female spore; a spore of the larger of two types produced by the sporophytes of a heterosporous taxon; produced in a megasporangium; giving rise upon germination to a megagametophyte. |
squama pl. squamae |
= lepis; < scale, trichome |
STRUCTURE |
|
A relatively thick, planate trichome. See also squamella (squamule). |
floret |
|
STRUCTURE |
|
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). |
glochid |
= glochidium; < bristle, capillus, hair, seta, trichome |
STRUCTURE |
|
A capillus (hair) or bristle (seta) that bears one or more barbs; esp. in Cactaceae. |
lip |
= labium; > labellum |
STRUCTURE |
|
Any substructure that resembles a lip, especially a portion of a perianth, calyx or corolla. |
ray 2 |
= lamina |
STRUCTURE |
|
The distal, relatively flat portion of the corolla of a ray floret, terminating in 0--4 teeth or lobes; in Asteraceae (Compositae). |
megastrobilus pl. megastrobili |
= female cone, macrostrobilus (not recommended) |
STRUCTURE |
|
A strobilus (cone) whose fertile organs are all megasporophylls. |
spine |
= thorn |
STRUCTURE |
|
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. |
wall (fruit, ovary, pollen, spore) |
|
STRUCTURE |
|
The exterior layer of tissue(s) enclosing anatomically distinct interior tissues and sometimes fluid and/or one or more cavities. |
needle |
< leaf, macrophyll (not recommended), megaphyll |
STRUCTURE |
|
A relatively stiff, compressed-acerose leaf; in Pinophyta. |
sterile frond |
= trophophyll |
STRUCTURE |
|
A frond that does not bear sporangia; in Polypodiophyta. See also fertile frond. |
hypanthium 1 (broad sense) pl. hypanthia |
= floral cup (broad sense), floral tube |
STRUCTURE |
|
A complex structure comprising fused portions of the perianth and/or androecium of a flower, sometimes also including receptacular tissue; surrounding and wholly, partly, or not at all adnate to the gynoecium; subdivided morphologically into casing, collar and/or neck; sometimes bearing free distal portions of the constituent structures. |
throat 2 |
|
STRUCTURE |
|
The fully connate portion of the limb of a disc floret, proximal to the lobes (distinct distal portions of the petals); in Asteraceae (Compositae). |