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Genisteae
Genisteae is a tribe of trees, shrubs and herbaceous plants in the subfamily Faboideae of the legume family Fabaceae. It includes a number of well-known plants including lupine (lupin), broom, gorse and laburnum. The tribe's greatest diversity is in the Mediterranean, and most genera are native to Europe, Africa, the Canary Islands, India and southwest Asia. However, the largest genus, ''Lupinus'', is most diverse in North and South America. ''Anarthrophytum'' and ''Sellocharis'' are also South American and ''Aryrolobium'' ranges into India. ==Description== The Genisteae arose 32.3 ± 2.9 million years ago (in the Oligocene). The members of this tribe consistently form a monophyletic clade in molecular phylogenetic analyses.〔 The tribe does not currently have a node-based definition, but several morphological synapomorphies have been identified: … bilabiate calyces with a bifid upper lip and a trifid lower lip, … the lack of an aril, or the presence of an aril but on the short side of the seed, and stamen filaments fused in a closed tube with markedly dimorphic anthers … and presence of α-pyridone alkaloids.〔 Most (and possibly all) genera in the tribe produce 5-''O''-methylgenistein. Many genera also accumulate quinolizidine alkaloids, ammodendrine-type dipiperidine alkaloids, and macrocyclic pyrrolizidine alkaloids.〔〔
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