peltate


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
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.
venusta's ENFs could be morphologically characterized as peltate glandular trichomes with short pedicel and multicellular ovoid heads, covered by a thin layer of cuticle and provided with a secretory pole (Figure 1d, e and f).
Due to the imbricate and peltate nature of the scale leaves, up to three layers of leaf blades may cover the rhizome (see Fig.
Derwiduee and Gonzalez (2010) found in species of the genus Aechmea, trichomes with the peltate portion formed by cells with little differentiation extending radially and firmly adhering to the epidermis, making it difficult to distinguish the contour of the scale.
1a: Stomata mostly diacytic, stellate trichomes monomorphic, peltate glands (Type-II) and capitate trichomes present .
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.
Ovary 5-locular, with axile placentation and many ovules per locule, superior; style impressed, short to quite long; stigma usually peltate, sometimes also lobed.
The Taxaceae are distinguished from other conifer families (except for Cephalotaxaceae) by compound pollen strobili or simple structures derived from compound pollen strobili, peltate microsporophylls, and solitary, terminal ovules embedded in a fleshy closed or open aril.
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.