Topic #9: Pinaceae

• • The largest genus in Pinophyta
  • Has 2 ovules in their seed scales
  • They are woody and monoecious
  • Their leaves may be solitary or in bundles.
  • Needles are in cluster of 2 to 5
  • Their umbo may be terminal or dorsal
• • Male cones are small with spirally arranged scales, each having 2 pollen sacs
  • Female cones are woody, with persistent soles having two winged-seeds per scale
• • They are mostly evergreen which means that they don’t change foliage with the change in season
  • However, Genus Larix is not evergreen but deciduous.
• Contains 11 genera:

  • Pinus
  • Abies (fir)
  • Picea
  • Pseudotsuga (Douglas fir)
  • Larix
  • Tsuga (hemlock)
  • Pseudolarix
  • Cedrus
  • Keteleeria
  • Cathaya
  • Nothotsuga
• Differentiate the species under the Genus Pinus:

  • Pinus kesiya (Benguet pine) - they have 3 needles or fascicle
  • Pinus merkusii (Sumatran pine) - have 2 needles or fascicle found in Occidental Mindoro
  • Pinus quadrifolia - have 4 needles per cluster
  • Pinus lambertiana - have 5 needles per cluster and produces longer cones
• In the Genus Pinus, both Pinus merkusii and Pinus kesiya are not endemic to Philippines
• What Pinus species is being shown in the images presented?

  A) Pinus kesiya

  
• What Pinus species is being shown in the images presented?

  A) Pinus merkusii

  
• What Pinus species is being shown in the images presented?

  A) Pinus quadrifolia

  
• What Pinus species is being shown in the images presented?

  A) Pinus lambertiana

  
• Genus Larix

  • Deciduous which means that they shed foliage in each season
• Genus Larix

  • Shoots are dimorphic with a separate Male and Female
• Genus Larix

  • Leaves are needle like, borne singly and spirally arranged on the long shoots in dense clusters of 20- 50 needles on the short shoots
• Genus Larix

  • Cones are erect and are green or purple but brown at maturity.
• What Larix species is being shown in the image presented?

  A) Larix decidua

  
• Genus Abies

  • Evergreen, narrow, and with conic crown.
• Genus Abies

  • They are flattened or rounded in old trees.
• Genus Abies

  • Ovulate cones are erect and dehiscent at maturity
• Genus Abies

  • Leaves are linear, spirally arranged and slightly swollen and flattened at the base.
• What Abies species are being shown in the images presented?

  A) Abies religiosa

  B) Abies homolepis

  
• Genus Picea

  • Conical having branches that are whorled.
• Genus Picea

  • Their leaves are linear, flat, or angular.
  • Their leaves are also spirally arranged and 4 angled.
• Genus Picea

  • Each needle on a small peg like structure called pulvinus (point where needles arise)
• Genus Picea

  • Cones erect but becomes pendulous (hanging down loosely) with persistent scales.
• Genus Picea

  • Have green to purple seed cones but pale to dark brown at maturity
• Genus Pseudotsuga

  • Leaves flat and needle like which are borne singly with 2 white stomatal bands
• Genus Pseudotsuga

  • Female cones are pendulous, with persistent scales (unlike true firs) and a long tridentine (3 pointed) bract that protrudes above each scale.
• Genus Pseudotsuga

  • Pollen cones are axillary and cylindric.
• Genus Pseudotsuga

  • Their bark is reddish brown and deeply fissured