Andrea B. Posted April 8, 2014 Share Posted April 8, 2014 Blum, A.G. (2014) Echinocactus grusonii Hildman with Spider Web (Cactaceae) Golden Barrel Cactus. Flowers photographed in ultraviolet and visible light. http://www.ultraviol...ith-spider-web/ Desert Botanical Garden, Phoenix, Arizona, USA23 April 2013Wild cactus as botanical garden specimen Synonyms:Mother-in-Law's CushionComment:From the Wikipedia entry(1) we have that the wild population of the Mexican cactus E. grusonii is endangered. However, wide cultivation of the species has preserved it as a popular ornamental in US Southwestern gardens and botanical parks.Look how much more obvious the extensive spider web is in the UV photograph. Reference:1. Echinocactus grusonii (2014 Wikipedia: http://en.wikipedia....cactus_grusonii I'm not yet really comfortable referencing Wikipedia, but it's all I currently have for this Echinocactus.2. Desert Botanical Garden (2014) Phoenix, Arizona, USA This marker is near a smaller group of E. grusonii not seen in the photos below. Equipment [Nikon D600-broadband + Nikon 105mm f/4.5 UV-Nikkor] Visible Light [f/11 for 1/400" @ ISO 200 in Sunlight with Baader UVIR-Block Filter] Ultraviolet Light [f/11 for 1/2" @ ISO 400 in Sunlight with Baader UV-Pass Filter] Link to comment
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