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              Plant collector societies
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          |   | Bamboo societies Phyllostachys, Bambusa, Semiarundinaria, Fargesia, and more ...
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          |   | Cactus and succulent societies Adenium, Aloe, Asclepiadaceae, Echinocereus, Epiphyllum, Euphorbia, Haworthia, Mammillaria, Mesembryanthemaceae, Optunia,  Sansevieria, Stepeliad,  Tephrocactus, and more ...
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          |   | Conifer societies Abies, Arborvitae, Cathaya, Cedrus, Chamaecyparis, Cupressus, Juniperus, Picea, Taxus, Tsuga (bearing cones)
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          |   | Sedum societies Sedum, Rhodiola, Hylotelephium, Rosularia, Orostachys, Mucizonia and Sinocrassula
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              Special focus gardening forums
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              Professional associations
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          |   | Invasive plants Web links to invasive plant associations promoting alien plant abatement work.
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          |   | Native plants Web links to associations promoting plant restoration using native species.
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              Research groups and plant databases
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              Arboretum and botanical gardens
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              Conservation and restoration groups
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              Native plant and wildflower societies
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          |   | Focus on natural dyes The traditional art of dyeing has been practiced for centuries.  Every good 
homemaker knew the basic principles of dyeing and most had a working knowledge 
of the local plants that could be used to create attractive colors on linen, 
silk and wool.
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