sagittate


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Related to sagittate: Sagittarius

sagittate

[′saj·ə‚tāt]
(botany)
Shaped like an arrowhead, especially referring to leaves.
References in periodicals archive ?
When you look at a plant that is described as having sagittate leaves, you can see the arrowhead shape.
The genus is readily separated from other Oriental genera of the tribe Tropidocephalini, subfamily Delphacinae, by the frons widest at basal 1/3, by the antennae with the scape forked at its apex, sagittate, by the forewings often with a fuscous central longitudinal fascia, costal area light yellow or yellowish white, and by the aedeagus with complex phallobase, phallus with long spinous processes at apex.
Basal leaves absent; cauline leaves numerous, sessile, often fleshy and becoming leathery upon drying, petiolate or sessile and auriculate or not at base, rarely sagittate or amplexicaul, entire or coarsely dentate, rarely pinnatisect, reticulately veined.
4 mm, stamens exceeding the petals by a fraction of the anthers, filaments subcomplanate, not at all delated toward the apex, pale yellow, adnate to the petals for 3-4 mm, anthers linear, 7-10 mm long, base sagittate and apex obtuse, fixed near the base, pollen oblong-elliptic, sulcate, exine reticulate, lumina subrounded, muri narrowed, style exceeding the petals for ca.
29 mm; anthers linear, 8-9 mm long, dorsifixed for % of its length above the base, base sagittate, apex apiculate, slightly recurved; pollen globose, biporate, exine appearing insulate?
15 mm long, fimbriate, white, proximally yellow; stamens 5; anthers sagittate, introrse, 2.
5 mm long, dorsifixed near the base, base sagittate, apex obtuse; pollen broadly ellipsoidal, sulcate, exine microreticulate, lumina irregularly polygonal; ovary 6-7 x 3-4 mm, subtrigonous, greenish-white, glabrous or nearly so; epigynous tube lacking; placentation apical or nearly so; ovules numerous, globose, obtuse; style slightly exceeding the anthers; stigma conduplicate, white, the styler lobes terete, suberect, ca.
2 mm long, base distinctly sagittate, apex acute, strongly recurved toward the apex, fixed at base, adnate to each other at base and free toward the apex, forming a stellate structure well visible at the apex of corolla, ca.
24 mm; stamens completely exposed by the recurved petals at anthesis, radially disposed; filaments terete, white, the antesepalous ones free, the antepetalous ones shortly adnate to the petals; Anthers linear, 13-15 mm long, base sagittate, apex obtuse, fixed near the base, slightly shorter than the petals; Pollen narrowly ellipsoid, sulcate, exine reticulate, lumina rounded, muri slightly thickened; style exceeding the petals, white; stigma conduplicate, blades spreading-contorted, densely papillose, white, ca.
22 x 2 mm appendages adnate to the petals for 18-19 mm, (the distal margins free, the proximal margins adnate to petals for 18-19 mm), the free lobes ovate, 3-4 mm long, apex slightly recurved; stamens completely exposed by the recurved petals at anthesis, suberect; filaments terete, white, the antesepalous ones free, the antepetalous ones shortly adnate to the petals; anthers linear, 7-8 mm long, base sagittate, apex obtuse, fixed near the base, shorter than the petals; pollen narrowly ellipsoid, sulcate, exine broadly reticulate, lumina rounded, muri narrowed; style exceeding the petals, white; stigma conduplicate, blades subspreading, densely papillose, white, ca.
0,7 mm wide, flattened, not thickened towards the apex, yellowish; anthers linear, subdorsifixed, slightly sagittate, with a thick green connective and dark brown to blackish thecae, pollen yellow; ovary conical, the lower 1/3 (= nectary tissue) sunk into the receptacle, yellowish, nectary tissue orange, the superior part 7 mm long; ovules white, the flat chalazal appendage about half as long as the ovule proper; style ca.
12 mm, the antesepalous ones free; anthers sublinear, 5-6 mm long, base sagittate, apex obtuse and bearing an conspicuous bifid- caudate, hooklike apiculous, dorsifixed at 1/3 of its length above the base; pollen globose, inconspicuously porate, exine psilate; style ca.