DaveO Posted July 25, 2014 Share Posted July 25, 2014 Oldfield, D. 2014. Grevillea rosmarinifolia A. Cunn. (Proteaceae) Rosemary Grevillea. Flowers photographed in visible and ultraviolet light. http://www.ultravioletphotography.com/content/index.php?/topic/943-grevillea-rosmarinifolia-rosemary-grevillea/Maldon, Victoria, Australia22 July 2014Australian Native Wildflower as Garden Specimen CommentGrevillea rosmarinifolia is widespread in Victoria from the Little Desert in the west to the Goldfields in Central Victoria with several different flower colour and leaf forms. This specimen is probably a variant of the Lara form from near South Mandurang in Central Victoria. Visible Light: Pentax K-5 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Metz 15 MS-1 flash, 1/180 s @ f/16 ISO 200, B+W UV/IR Cut Filter.Image Reference: DO53213 Ultraviolet Light: Pentax K-5 Full Spectrum Modification, Nikon Rayfact PF10545 MF-UV 105 mm f/4.5 lens, Nikon SB-14 flash, 1/180s @ f/16 ISO 200, Baader UV-Pass Filter.Image Reference: DO53223 References:Olde, P. and Marriott, N., The Grevillea Book, 1995, Volume 3, p. 147. Atlas of Living Australia http://bie.ala.org.a...+rosmarinifolia Published 25 July 2014 Link to comment
nfoto Posted July 25, 2014 Share Posted July 25, 2014 Interesting UV signature. I have seen similar with other red-coloured flowers. Are the pollinators known for this species? Link to comment
DaveO Posted July 25, 2014 Author Share Posted July 25, 2014 We recently managed to get a copy of Volume 1 of the Grevillea book, long out of print so I will see what it says. As a general observation Grevilleas are well know to attract birds to gardens, especially Honeyeaters which have long slender beaks but they perch on the branches they don't hover like humming birds. "Most Grevillea flowers appear well adapted to pollination by birds. The syndrome of the typical bird-pollinated flower ..... includes the following features, bright colour, usually red; tubular flower, either erect or pendulous; strong corolla without landing stage; no scent; abundant nectar; anthers and stigma well clear of nectary; and a branch or peduncle as a perch."Parrots, in our experience, destroy the flowers in their quest for the nectar, they just rip them off and eat them! "Almost all species of Honeyeater have been observed at the flowers of Grevilleas" Link to comment
nfoto Posted July 25, 2014 Share Posted July 25, 2014 OK. I shall add this to the data for my long planned metadata analysis of UV signatures. Link to comment
DaveO Posted July 26, 2014 Author Share Posted July 26, 2014 I would be very happy to give you any data you need on the UV signatures of Australian natives. The Eremophilas are of interest as they contain both insect and bird pollinated species with clear differentiation in terms of flower shape and colour and differences in their UV signatures. It also looks as if Eucalypts and Acacia always have UV-black flowers. Link to comment
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