Cassiope tetragona : Arctic White Heather

Taxonomy

Scientific Name:

Kingdom: Plantae

Division:

Class: Dicoteldonae (two seed-leaves)

Family: Ericaceae (Heath Family)

Genera: Cassiope (White Heather) (Named after Cassiopia of Greek mythology.)

Species: tetragona (Gk. tetra=four + gonia=an angle)

English Name(s):

Arctic White Heather,

First Nation Names:


Description

Structure:

  • Branches stiff, ascending to erect, quadrangular (4-sided), 5-30 cm long.
  • Coarse, heath-forming, matted, dwarf, shrub.

Leaves:

  • Simple (not compound or lobed).
  • 2-6 mm long, deeply grooved on the back, leathery dark green.
  • Opposite arranged in 4-rows, imbricated (overlapping).
  • Evergreen.

Reproductive Parts:

  • Flowers perfect (bisexual) and regular (symetrical).
  • Pedicel (flower stalks), glabrous (hairless), more than twice longer than subtending leaves.
  • Calyx (sepal) 5 lobes nearly separate, yellow green. Corolla (petals) 5-8 mm long, cream to white.
  • Corolla united, flowers making flowers bell-shaped, 5-lobed.
  • Flowers solitary from the leaf axils bending outwards.
  • Ovary 5 loculed (chambered).
  • Stamens (male parts) 10.

Seed:

Not to Be Confused With:


    Biology

    Physiology:

    • Shoots produce very few leaves per year. The leaves function for about 4-5 years and are highly vulnerable to snow abrasion.
    • The bell-shaped flowers trap hot air rising from the ground and can be up to 5 degrees C warmer inside than the ambient air temperature.

    Life Cycle:

    Seasonal Cycle:

    • Plants finnished blooming by mid-July.

    Ecology

    Animal Uses:

    • Insects will overnight in the bell-shaped flowers to take advantage of the flowers heat traping abilities.

    Habitat:

    • Grows best out of the wind. On leeward slopes or divits in the ground, where early winter snows collect.
    • On not to dry alpine slopes, heaths, and tundra.
    • Preferes calcareous soils.

    Uses

    Modern:

    Industrial:

    Medicinal:

      Food:

        Traditional Gwich'in:

        Folklore:

          Industrial:

            Medicinal:

              Food:

                Traditional Other:

                Folklore:

                  Industrial:

                    Medicinal:

                      Food:

                        Images

                        Typical erect branches


                        Bell-shaped flowers in full bloom


                        Galls infecting upper leaves.


                        Illustration from: Illustrated Flora of BC


                        Range Maps

                        World Range: Circumpolar, arctic; in N.A. Greenland to NU, and LB to AK, south to Hudson Bay and mountainous BC.

                        Prov/State Abrev. List


                        In Yukon: Throughout the mountainous regions of the territory. North to the Arctic coast.

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