pinnate

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pinnate

, pinnated
1. like a feather in appearance
2. (of compound leaves) having the leaflets growing opposite each other in pairs on either side of the stem

pinnate

[′pi‚nāt]
(botany)
Having parts arranged like a feather, branching from a central axis.
References in periodicals archive ?
Blades pinnately divided or lobed, veins free, margins entire to dentate; sporangia sessile or terminating short stalks 2.
term correct application anterior applicable only in strongly zygomorphic flowers, but even there it remains doubtful posterior see anterior pinnate description of compound leaves with leaflets arranged on opposite sides of an elongated axis or of a certain venation pattern bipinnate twice pinnate (leaves), see above tripinnate pinnately compound three times, with pinnate pirmules (leaflets) quadripinnate pinnately compound four times, with nate pinnules (leaflets) scape leafless peduncle arising from ground level (usually from a basal rosette) in acaulescent plants (e.
Stem often erect, sometimes prostrate, occasionally julaceous, [+ or -] pinnately branched, branches 1-2 cm; stem transverse section round-oval, with central strand, large and thin-walled medullar cells and 4-5 layers of yellowish-brown, thick-walled cortical cells enclosed by a well developed hyalodermis; axillary hairs abundant (4-7 per leaf axil), with 3-5 hyaline or brownish apical cells; pseudoparaphyllia foliose, broad, [+ or -] quadrate with irregular mar gin.
It is the only prairie maple with pinnately compound leaves, generally consisting of 3-5 oval to oblong leaflets, light green above and grey-green below, that turn a clear yellow in the fall.
Compound leaves are either palmately compound, pinnately compound, or bipinnately compound.
These traits were: (1) leaf shape, calculated as the number of leaf lobes on one side of the longest leaf divided by the length of the longest leaf, on the pinnately lobed rosette leaves 111 d after planting; (2) inflorescence diameter, measured on the primary inflorescence at flowering; (3) petal shape, calculated as petal lobe length divided by lobe width of a haphazardly selected flower on the primary inflorescence; and (4) flower color, quantified to the nearest 0.
Its long leaves (up to 1 m) are pinnately compound and contain 10-20 pairs of leaflets, each [approximately equal to]40 [cm.
5 cm and leaves are 1~2 mm long with pinnately arranged side branches, progressively longer towards the base and triangular in shape.
Leaves pinnately compound, up to 17 per stem apex, straight to slightly arching, to 160 cm long.