nfoto Posted May 1, 2013 Share Posted May 1, 2013 Rørslett, B. 2013. More on the UV Signature of Berlandiera lyrata Benth. (Asteraceae). Chocolate Flower. Flowers photographed in ultraviolet light. http://www.ultraviol...ocolate-flower/ Blum 2013 showed that Berlandiera lyrata had a strong central pattern ("bull's eye" type) in UV light. Here are a few additional photographic observations of the same species, carried out in Tucson, Arizona (USA) in March 2012. All UV photographs obtained with Nikon D40X, UV-Nikkor 105 mm f/4.5 lens, Baader U 2" (Venus) filter, and SB-140 flash. Image reference: BERL_LYR_I1203134639_UV.jpgThis frontal view depicts the same UV pattern as observed by Blum (2013). Disc flowers open from the periphery towards the centre of the capitulum. The corolla of the disc flowers is UV black and so are the anther tubes and exserted styles. Image reference: BERL_LYR_I1203134643_UV.jpgThe phyllaries are densely covered with stout hairs that are UV bright. The abaxial (lower) surface of the ray flowers show a variety of UV-related features. There are UV-dark stripes on the ligules combined with UV-bright hairs. Outside the veins, the ligule surface is dotted with smaller, UV-dark hairs. References:Blum, A.G. 2013. Berlandiera lyrata [Chocolate Flower]. http://www.ultraviol...ocolate-flower/ [Published 1 May 2013, last update 20 May 2013] Link to comment
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