Re: Sadleria cyatheoides

I wonder if it has to do with the level of UV radiation?  Hawaii is
closer to the equator than San Diego (therefore a shorter path for
sunlight through the atmosphere), and the altitude also increeases the UV.

DN

Dean Ouer wrote:
> Hi all,
> On a recent trip to Hawaii (Kona) I noticed large amounts of Sadleria
> cyathiodes everywhere beginning abruptly at approx. 2200 feet elevation. All
> had green emerging fronds. Then at around 3000 feet and higher they all
> abruptly (so abruptly it hardly seemed possible) changed to identical looking
> plants but all having red emerging fronds. Does anyone know for sure what is
> going on? If its the cooler weather, then my S. cyatheoides here in coastal
> San Diego should be red since its similar weather to 4000 feet there. If its
> the added rainfall at the higher elevation, same thing since I water a lot
> here. I know there may be a lot of different theories but does anyone know for
> sure? I ordered Daniel Palmer's "Hawai'i's Ferns" and it doesn't say anything
> about the red fronds. Could it really be a different variant or species? Has
> anyone seen a red frond S. cyatheiodes at lower elevations in Hawaii.
> Thanks,
> Dean Ouer
> 
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-- 
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David Nicholls
Nicholls Communications
dcn@dcnicholls.com
http://www.dcnicholls.com/
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