Horsetails

Card Set Information

Author:
DesLee26
ID:
269918
Filename:
Horsetails
Updated:
2014-04-12 10:30:28
Tags:
BIO319
Folders:
Plant Kingdom
Description:
Mickle
Show Answers:

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  1. structure
    • Conspicuously jointed stems and rough texture
    • Small, scalelike leaves are whorled at the nodes
    • Branches arise laterally at the nodes and alternate with leaves
    • Internodes are ribbed and ribs are tough and strengthened with siliceous deposits in the epidermal cells
    •  
    • Roots orginate at the nodes of the rhizomes
    •  
    • Aerial stems from underground rhizomes
    •  
    • Carinal canals are located in aerial stems
    •  
    • Has elaters that coil when moist and uncoil when dry (different from Marchantia elaters); elongated cells with helically arranged wall thickenings
  2. Location
    moist or damp places, by streams, and along edges of woods
  3. Reproduction
    Homosporous reproduction

    Sporangia are born on sporangiophores, which are clustered into strobili (cones) at the apex of the stem
  4. Gametophytes
    Gametophytes: green and free-living; can be bisexual or male; archegonia develop before antherida
  5. How can horsetails be distinguished?
    • they have jointed stems and rough texture
    • small, scalelike leaves are whorled at the nodes

    internodes are ribbed adn ribs are tough and strengthened with siliceous deposits in the epidermal cells
  6. What is hte method of reproduction?
    homosporous

    sporangia borne on sporangiophores which are clustered into strobili at the apex of the stem

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