amorphophallus
Jane Sargent (Fri, 23 Mar 2018 08:41:13 PDT)
I agree that some ranunculus drop their petals promptly, but here is an
article (with wonderful photos) about plants with extreme adaptation to
cold, including some Ranunculus.
Here is a quotation that is relevant to Ranunculus, and one of the photo
exemplars they give is of Ranunculus glacialis. It says that after
warming the seed, the petals then close and turn pink, converting from a
parabolic reflector to a greenhouse. There is a photo.
"Parabolic flower shape concentrates heat in the m
iddle of
the flower and flowers track the sun (heliotropism)
as it
circles overhead. Reflects the warmth from the sun'
s rays
towards the flower centre. Helps to attract pollina
ting
insects and to speed seed development"
Jane Sargent
_______________________________________________
pbs mailing list
pbs@lists.pacificbulbsociety.net
http://lists.pacificbulbsociety.net/cgi-bin/…