Scalesia: Difference between revisions
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Daarznieks (talk | contribs) Scalesia pedunculata forests, their distribution |
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''Scalesia'' species have been called "the [[Darwin's finches]] of the plant world" because they show a similarly dramatic pattern of [[adaptive radiation]]. |
''Scalesia'' species have been called "the [[Darwin's finches]] of the plant world" because they show a similarly dramatic pattern of [[adaptive radiation]]. |
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''Scalesia pedunculata'' |
One of the largest and most widespread is ''Scalesia pedunculata'' - a large tree species which grows up to 15 - 20 meters tall, which reaches maturity in a few years time. The trees typically grow in dense stands of the same species and the same age. They die around the same time, and then a new generation of seedlings grow in the same place. |
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Largest stands of ''Scalesia pedunculata'' have formed in the humid windward sides of [[Santa Cruz Island (Galápagos)|Santa Cruz]], [[San Cristóbal Island|San Cristóbal]], [[Santiago Island (Galápagos)|Santiago]] and [[Floreana Island|Floreana]] islands, at 400 - 700 m height.<ref>{{cite web|url=http://www.wondermondo.com/Countries/SA/Ecuador/Galapagos/ScalesiaSantaCruz.htm|title=Forest of daisy trees in Santa Cruz, Galapagos|publisher=Wondermondo}}</ref> The best known and most visited is a stand in Santa Cruz Island, which is crossed with a road. |
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''Scalesia atractyloides'' and ''Scalesia stewartii'' are two small tree species, very similar to each other. |
''Scalesia atractyloides'' and ''Scalesia stewartii'' are two small tree species, very similar to each other. |
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==References== |
==References== |
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* Eliasson, U.H. 1974. Studies in Galapagos Plants XIV. The Genus Scalesia Arn.Opera Botanica, 36: 1-117 |
* Eliasson, U.H. 1974. Studies in Galapagos Plants XIV. The Genus Scalesia Arn.Opera Botanica, 36: 1-117 |
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{{Reflist}} |
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[[Category:Scalesia|*]] |
[[Category:Scalesia|*]] |
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Revision as of 21:15, 11 March 2012
| Scalesia | |
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| Scalesia pedunculata on Santa Cruz (Galapagos Islands) | |
| Scientific classification | |
| Kingdom: | |
| (unranked): | |
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| Order: | |
| Family: | |
| Tribe: | |
| Genus: | Scalesia |
| Species | |
Scalesia is a genus in the family Asteraceae endemic to the Galapagos Islands. It contains fifteen species displaying shrub or arborescent habit. It is unusual because tree species are rare in Asteraceae.
All of the species have soft, pithy wood.
Scalesia species have been called "the Darwin's finches of the plant world" because they show a similarly dramatic pattern of adaptive radiation.
One of the largest and most widespread is Scalesia pedunculata - a large tree species which grows up to 15 - 20 meters tall, which reaches maturity in a few years time. The trees typically grow in dense stands of the same species and the same age. They die around the same time, and then a new generation of seedlings grow in the same place.
Largest stands of Scalesia pedunculata have formed in the humid windward sides of Santa Cruz, San Cristóbal, Santiago and Floreana islands, at 400 - 700 m height.[1] The best known and most visited is a stand in Santa Cruz Island, which is crossed with a road.
Scalesia atractyloides and Scalesia stewartii are two small tree species, very similar to each other.
References
- Eliasson, U.H. 1974. Studies in Galapagos Plants XIV. The Genus Scalesia Arn.Opera Botanica, 36: 1-117
- ^ "Forest of daisy trees in Santa Cruz, Galapagos". Wondermondo.
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