peltate


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Related to peltate: peltate leaf, glandular

peltate

[′pel‚tāt]
(botany)
Of leaves, having the petiole attached to the lower surface instead of the base.
References in periodicals archive ?
Rhizomes long, creeping; fronds 25-75 cm long, evergreen; petioles with tan scales; blades oblong-lanceolate, 20-55 cm long, pinnate; pinnae auriculate; fertile pinnae upper one-half of frond; sori round, submedial; indusia peltate.
Rhizomes short, covered with brown scales; fronds 25-50 cm long; blades pinnate, 15-40 cm long, oblong-ovate; pinnae 4-10 pairs, alternate; sori round, scattered; indusia peltate.
In the Taxaceae, viewed by Florin as distinct from the true conifers, the peltate microsporophyll of Taxus is considered primitive for the group and derived from a simple dichotomized branch system with terminal erect sporangia.
microsporophylls peltate, sterile peltate tip fiat.
megasporophylls peltate, with a narrow basal stalk, hexagonal with a
Ovary 5-locular, with axile placentation and many ovules per locule, superior; style impressed, short to quite long; stigma usually peltate, sometimes also lobed.
Indumentum of unbranched, variously branched, peltate, or scalelike, glandular to non-glandular hairs, and sometimes papillae.
6 mm, peltate, loosely appressed, linear-lanceolate, long-attenuate, bicolorous, the central portion with a conspicuous dark stripe, the stripe dark-brown to blackish, opaque, indurate except for the point of attachment which is brown, the outer portions on either side of the stripe tan, hyaline, often eroded in age, the margin denticulate, the teeth simple or bifid.
The microsporophylls within this compact structure are peltate or apically thickened, a distinctive feature of the Taxaceae and the Cephalotaxaceae but also present in the Araucariaceae.
In both Alismatales and Nymphaeales there is a remarkably similar heteroblastic progression of linear to laminar to broadly ovate or peltate leaves.
Leaf development has been described in Microgonium tahitense, a species of filmy fern with unusual peltate leaves (Hagemann, 1988).
Gynoecium 2 (-3-5) (pentacarpellate in Desfontainia); syncarpous, sometimes apically apocarpous or completely apocarpous (Mitreola); superior to semi-inferior (Mitreola); locules usually as many as carpels (except Anthocleista which has a false septurn) but sometimes with imperfect partitions in their upper portions: style 1 [-2(Cynoctonum)], terminal: stigma capitate (Strychnos) or usually shortly lobed (Plocosperma) or twice dichotomously branched: ovules usually numerous, rarely as few as 1-4, placenta usually peltate or parietal, rarely basal.