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Aceraceae A. L. Jussieu
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habit
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woody plants
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important diagnostics
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milky juice present
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hairs
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glandular, stellate, 2-armed or T-shaped, non-glandular
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distribution
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Asian, European, North American
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leaf: position
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opposite or verticillate
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leaf: nature
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not compound, compound, ternately compound, palmately compound
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leaf: venation
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pinnate or hardly visible in leaves or leaflets., palmate in leaves or leaflets
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margin
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with entire margin, lobed or divided, dentate
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leaf: epidermis
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epidermis of leaf papillose
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leaf: stipules
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absent
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inflorescence
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raceme, spike, corymb, umbel, fascicle, compound, sympodial or monopodial
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flower: sexuality
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bisexual, unisexual
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flower: symmetry
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actinomorphic
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flower: receptacle
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small, enlarged, totally or partially free from the ovary
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flower: disc
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absent, present
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flower: perianth number
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4, 5, 7+
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flower: perianth nature
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perianth of similar segments, perianth of calyx and corolla
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flower: sepal number
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4, 5
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flower: sepal position
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all free from one another, connate
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flower: sepal nature
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sepals imbricate or contorted
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flower: petal number
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0, 4, 5
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flower: petal position
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all free from one another, petals imbricate
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stamen: number
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4, 5, 6, 7, 8, 9, 10
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stamen: anthers
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basifixed, introrse, opening by longitudinal slits
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stamen: filaments
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free from the corolla, not connate
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pistil: style
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styles more than 1, free, style 1, or styles more or less connate
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pistil: carpel
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2
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pistil: ovary
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2-locular
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pistil: ovule
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1 in each loculus, 2 in each loculus
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pistil
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ovules axile, carpels connate, ovules attached to the central axis or ventrally in apocarpae
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fruit: type
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a nut
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fruit: seed
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2 seeds
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seed: cotyledons
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folded or crumpled
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seed: endosperm
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seeds without endosperm
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