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Published In: Systema orbis vegetabilium 35. 1830. (5-12 Jul 1830) (Syst. Orb. Veg.) Name publication detail
 

Project Name Data (Last Modified On 9/21/2011)
Acceptance : Accepted
Project data     (Last Modified On 9/21/2011)
Notes: Twelve genera and about 220 species, mainly in temperate regions of the northern hemisphere. Only one genus, Pinus, in the Flora Palaestina.

 

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Monoecious trees, rarely shrubs, mostly resinous. Leaves mostly persistent, solitary or fasciculate, generally spirally arranged, linear, semiterete, terete or compressed-triquetrous, entire or minutely serrulate. Reproductive organs in cones with spirally arranged scales. Staminate cones surrounded at base by a whorl of sterile bracts and consisting of scale-like stamens each with 2 pollen sacs (microsporangia) on the under-surface. Scales of ovulate cones mostly double: the lower one (bract) sterile, the upper (ovuliferous scale) with 2 ovules on its inner surface; mature cones usually woody, closed. Seeds usually winged and 2 on each scale.

 

 
 
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