Page 10: 546 results for head
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Arctium minus (common burdock)
...flower heads 25-45 mm wide and array of flower heads flat-topped (vs. A. minus, with bur-like flower heads 15-25 mm wide and array of flower heads not flat-topped).: Arctium lappa ...
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Erigeron canadensis (Canada fleabane)
...Flower head outer flowers: at the outer edge of the flower head, each flower has a single enlarged lobe or strap. Flower head platform: ...
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Artemisia absinthium (oldman wormwood)
...flower heads: the flower head has tubular disk flowers in the center and ray flowers, these often strap-shaped, around the periphery. Height of flowe...
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Artemisia frigida (prairie wormwood)
...Flower head number: each flowering stem has four or more flower heads on it. Flower head profile: the disk is flat or nearl...
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Matricaria discoidea (rayless chamomile)
...flower heads. Number of bracts at flower head base: 29.0 NA–47.0 NA. Flower head number: each flowering ...
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Cosmos parviflorus (southwestern cosmos)
...flower heads: the flower head has tubular disk flowers in the center and ray flowers, these often strap-shaped, around the periphery. Ovary profile: ...
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Coreopsis verticillata (thread-leaved tickseed)
...flower head base: 16.0 NA–16.0 NA. Flower head position: each of the flower heads is separate on its own peduncle (stalk), not cl...
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Lactuca sativa (cultivated lettuce)
...flower head base: 6.0 mm–15.0 mm. Flower type in flower heads: the flower head has ray flowers only, meaning all of the individua...
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Bidens vulgata (tall beggar-ticks)
...flower heads: the flower head has disk flowers only, and lacks the strap-shaped flowers. Flower head platform: the base has...
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Ambrosia artemisiifolia (common ragweed)
...Flower head shape: the flower head is cup-shaped (the sides diverge, then curve upwards and become parallel). Flower type in flower heads: ...