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Word of the Week

Close up of Thuja (arborvitae) leaves.
Word of the Week

Botanical Nerd Word: Imbricate

Imbricate: Overlapping like roofing shingles; in conifers, used for tightly pressed scale leaves of many Cupressaceae and Podocarpaceae.* The arborvitae (Thuja) above, a member of the Cupressaceae family, has imbricate …

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Tulip tree fruits in winter
Word of the Week

Botanical Nerd Word: Samara

Samara: A dry, indehiscent, winged fruit.* Tulip trees (Liriodendron tulipifera), maples (Acer spp.), and many other plants produce samaras, commonly referred to as ‘keys.’ Tulip trees, pictured above, often have whorls of …

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Word of the Week

Botanical Nerd Word: Elaiosome

Elaiosome (e-lay-o-zome): (Greek: elaion=oil + soma=body) literally meaning ‘oil body.’* A structure on the surface of a seed that secretes and stores oil, usually as an attractant to ants, which …

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Word of the Week

Botanical Nerd Word: Hilum

Hilum: The scar on a seed that marks the point at which it was attached to the plant.* Bean seeds have very obvious hilums. From left to right in the picture: …

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Orchid root showing velamen covering
Word of the Week

Botanical Nerd Word: Velamen

Velamen: The thick sponge-like covering of the roots of epiphytic orchids which helps prevent water loss and aids in absorption.*   *Allikas, G. & Nash, N. (2000). Orchids. London: PRC.

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Orchid flower illustrating zygomorphic shape
Word of the Week

Botanical Nerd Word: Zygomorphic

Zygomorphic: Bilaterally symmetrical, so that a line drawn through the middle of the structure along only one plane will produce a mirror image on either side.* Orchid flowers are zygomorphic. …

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Birch bark showing lenticels
Word of the Week

Botanical Nerd Word: Lenticel

Lenticel: A pore in the stem of a woody plant, showing as a raised spot that may be filled with a powdery substance. The pore permits air to reach tissues below …

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Oak with marcescent leaves
Word of the Week

Botanical Nerd Word: Marcescent

Marcescent (mar-ses-ent): of parts of certain plants, remaining attached to the plant when withered.* Many oak (Quercus spp.) and beech (Fagus spp.) trees have marcescent leaves that persist well into the …

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Word of the Week

Botanical Nerd Word: Pectinate

Pectinate: Arranged like the teeth of a comb; usually two-sided with respect to leaves.* Fir trees (Abies sp.) often show pectinate arrangement of their needles. *Eckenwalder, J.E. (2009). Conifers of the …

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Phormium showing equitant leaf arrangement
Word of the Week

Botanical Nerd Word: Equitant

Equitant: Of leaves, overlapping or straddling in two ranks, as the leaves of Iris.* This Phormium (New Zealand Flax plant) in the library shows equitant leaf growth. *Harris, J.G., Harris, M.W. …

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MORE ON THIS TOPIC

  • Botancial Nerd Word: Vernation
  • Botanical Nerd Word: Acerose
  • Botanical Nerd Word: Achlamydeous
  • Botanical Nerd Word: Acicular
  • Botanical Nerd Word: Actinomorphic
  • Botanical Nerd Word: Adventitious
  • Botanical Nerd Word: Aestivation
  • Botanical Nerd Word: Anemoballism
  • Botanical Nerd Word: Anemochory
  • Botanical Nerd Word: Anther
  • Botanical Nerd Word: Anthropochory
  • Botanical Nerd Word: Aphyllous
  • Botanical Nerd Word: Apical Dominance
  • Botanical Nerd Word: Areola
  • Botanical Nerd Word: Autochore
  • Botanical Nerd Word: Bacciferous
  • Botanical Nerd Word: Ballistic dispersal
  • Botanical Nerd Word: Biconvex
  • Botanical Nerd Word: Bifid
  • Botanical Nerd Word: Biophilia

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