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    Inflorescence Types

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    krishpokh
    The document defines and describes several types of plant inflorescences including verticillasters, cymes, racemes, panicles, catkins, spikelets, spadices, spikes, heads, umbels, and corymbs. It provides images of unknown inflorescence types and an answer key identifying each as catkins, verticillasters, heads, corymbs, racemes, panicles, spikelets arranged in a panicle, cymes, spadices, spikes, or umbels. The document is intended to teach plant morphology and identification of inflorescence structures.

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    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd

    Inflorescence Types

    Uploaded by

    krishpokh
    174 views26 pages
    The document defines and describes several types of plant inflorescences including verticillasters, cymes, racemes, panicles, catkins, spikelets, spadices, spikes, heads, umbels, and corymbs. It provides images of unknown inflorescence types and an answer key identifying each as catkins, verticillasters, heads, corymbs, racemes, panicles, spikelets arranged in a panicle, cymes, spadices, spikes, or umbels. The document is intended to teach plant morphology and identification of inflorescence structures.

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    The document defines and describes several types of plant inflorescences including verticillasters, cymes, racemes, panicles, catkins, spikelets, spadices, spikes, heads, umbels, and corymbs. It provides images of unknown inflorescence types and an answer key identifying each as catkins, verticillasters, heads, corymbs, racemes, panicles, spikelets arranged in a panicle, cymes, spadices, spikes, or umbels. The document is intended to teach plant morphology and identification of inflorescence structures.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    174 views26 pages

    Inflorescence Types

    Uploaded by

    krishpokh
    The document defines and describes several types of plant inflorescences including verticillasters, cymes, racemes, panicles, catkins, spikelets, spadices, spikes, heads, umbels, and corymbs. It provides images of unknown inflorescence types and an answer key identifying each as catkins, verticillasters, heads, corymbs, racemes, panicles, spikelets arranged in a panicle, cymes, spadices, spikes, or umbels. The document is intended to teach plant morphology and identification of inflorescence structures.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 26

    Verticillaster: Florets occurring in false whorls at nodes on a elongate stalk usually with

    pedicels and leaf-like bracts. Members of the Lamiaceae only and may appear spike-like.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Cyme: the growing tip becomes a floret before more arise from axillary buds. May apprea
    corymb-like and sometimes head inflorescences are arranged in cymes.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Raceme: elongated inflorescence with floret pedicels of about equal length that develop
    along a rachis.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Panicle: a main axis supports several racemes so that the inflorescence appears branched.
    Term often applied to any highly branched, elongate, inflorescence whose flowering
    sequence is s unclear, even if cymose.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Catkin: florets unisexual, apetalous, and tightly packed together on a rachis that
    usually droops downward (found only in some woody dicots, e.g. willow, birch, alder, oak).
    Inflorescence Types © Kwantlen.ca/Horticulture
    Spikelet: inflorescence consisting of an axis (rachilla), above two bracts (glumes) and one or
    more very small florets with perianths reduced paired bracts (the palea and lemma).
    Spikelets may be arranged in spikes, racemes, or panicles. Found in grasses and sedges.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Spadix: racemose inflorescence consisting of many tiny florets on an enlarged fleshy axis
    which is usually partially enclosed by a large bract (the spathe). In the Araceae only.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Spike: inflorescence elongate and raceme-like but with very short or no pedicels.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Head (Asteraceae): florets small, closely packed, lack pedicels, and arise from a flattened
    axis that is surrounded or subtended by bracts to appear as a large flower. Head
    inflorescences are commonly arranged in cymes and may be small.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Head: florets small, closely packed, lack pedicels, and arise from a flattened axis that is
    surrounded or subtended by bracts to appear as a large flower. Mainly in Asteraceae.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Umbel: pedicels (and rays if a compound umbel) of about equal length all arising from the
    apex of the peduncle. Mainly occur in the Apiaceae.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Corymb: florets are formed on lateral stalks of different length, the longest being at the
    base creating a flat-topped inflorescence.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Cyathium: consists of a simple female floret (one pistil) in the center surrounded by many
    simple male florets (one stamen each) on bracts. F.Y.I. - Found only in the Euphorbiaceae.
    Inflorescence Types © Kwantlen.ca/Horticulture
    Use the

    Key to the Basic Inflorescence Types

    in your lab manual or lecture handouts

    to identify the following unknowns .

    Practice identifying inflorescence unknowns


    Inflorescence Types © Kwantlen.ca/Horticulture
    Unknown #1
    Inflorescence Types © Kwantlen.ca/Horticulture
    Unknown #2
    Inflorescence Types © Kwantlen.ca/Horticulture
    Unknown #3
    Inflorescence Types © Kwantlen.ca/Horticulture
    Unknown #4
    Inflorescence Types © Kwantlen.ca/Horticulture
    Unknown #5
    Inflorescence Types © Kwantlen.ca/Horticulture
    Unknown #6
    Inflorescence Types © Kwantlen.ca/Horticulture
    Unknown #7
    Inflorescence Types © Kwantlen.ca/Horticulture
    Unknown #8
    Inflorescence Types © Kwantlen.ca/Horticulture
    Unknown #9
    Inflorescence Types © Kwantlen.ca/Horticulture
    Unknown #10
    Inflorescence Types © Kwantlen.ca/Horticulture
    Unknown #11
    Inflorescence Types © Kwantlen.ca/Horticulture
    1) Catkin

    2) Verticillaster

    3) Head

    4) Corymb

    5) Raceme

    6) Panicle

    7) Spikelet (arranged in a panicle)

    8) Cyme

    9) Spadix

    10) Spike

    11) Umbel
    Answer Key
    Inflorescence Types © Kwantlen.ca/Horticulture

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