bilabiate


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bilabiate

[bī′lāb·ē·ət]
(botany)
Having two lips, such as certain corollas.
References in periodicals archive ?
In Xyridaceae the calyx is monosymmetric in Abolboda and Xyris, the corolla is bilabiate in Orectanthe, and the ovary is dorsiventrally compressed in Aratitiyopea (Kral, 1998).
In Musaceae (Andersson, 1998b), Strelitziaceae (Andersson, 1998c), Heliconiaceae (Andersson, 1998a), and Lowiaceae (Larsen, 1998b) the median posterior stamen is reduced to a staminode or is missing, and the flowers are more or less conspicuously bilabiate.
a) Bilabiate (3+2 corolla lips): zygomorphic, with an external three-dentate lip, radiating or not, and an internal two-cleft lip (Fig.
e) Tubular-bilabiate (intermediate between 3+2 corolla lips and 0+5 corolla lobes): sub-zygomorphic, transitional type where the lip-lobes are erect and short and the incisions in the corolla are unequal, resulting in a slightly bilabiate corolla (Fig.
f) Sub-bilabiate (or pseudobilabiate; 4+1, 3+1 corolla lips): zygomorphic, probably derived from a bilabiate corolla with different degrees of fusion among the teeth.
Florets trimorphic; marginal florets female, without staminodes, corolla true ray to bilabiate with minute inner lips, outer lip expanded or not; intermediate florets female, staminodes absent, corolla filiform irregularly tubular, true ray to bilabiate, shorter than the style; central florets bisexual, corolla bilabiate to tubular-bilabiate; anther apical appendages acute, tails smooth to papillose; style bifid, branches dorsally papillose.
Capitulescences monocephalous, heads subterminal; capitula pedunculate, homogamous, bilabiate, six- to many-flowered; receptacle epaleate; involucre multiseriate, hemispherical, phyllaries subequal, the outer phyllaries commonly decurrent onto the peduncle.
Florets dimorphic to trimorphic; marginal florets female generally with filiform to well developed staminodes, corolla bilabiate with an expanded outer lip, rarely minute; intermediate florets (when present) female with or without staminodes, corolla bilabiate, rarely filiformbilabiate, as long as the style or longer; central florets bisexual, corolla bilabiate; anther apical appendages acute, tails smooth; style bilobed to bifid, dorsally papillose.
Capitulescences cymose, two- to nine-headed, subterminal to lateral, rarely monocephalous; capitula pedunculate, homogamous, bilabiate, two- to five-flowered; receptacle epaleate; involucre multiseriate, cylindrical, phyllaries glabrous.
Florets dimorphic, bisexual; marginal florets with corollas bilabiate, outer lip, expanded; central florets with corolla actinomorphic, tubular-campanulate, deeply five-lobed; anther apical appendages apiculate, tails papillose; style bifid, branches dorsally smooth.
Florets isomorphic, bisexual, corolla bilabiate, outer lip expanded or not; anther apical appendages acute, tails smooth; style bifid, branches apically truncate, crowned by collector hairs.
Floret bisexual, corolla actinomorphic, tubular-funnelform, deeply five-lobed to rarely becoming nearly bilabiate, lobes coiled at apex; anthers sometimes red-streaked, partly to mostly exserted, apical appendages acuminate, tails papillose, free; style bifid, sometimes reddish, branches dorsally smooth.