Epithets
| baccatus | bearing berries |
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| barbata | bearded |
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| barbatus | bearded |
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| basilica | royal |
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| basilicus | royal |
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| betuloides | like Betula (birch) |
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| bifurcata | forked |
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| bifurcatus | forked |
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| bilabiata | two lips |
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| bilabiatus | two lips |
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| biternata | with two sets of three |
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| biternatus | with two sets of three |
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| blepharosepala | fringed sepal |
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| blepharosepalus | fringed sepal |
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| bombycifer | silk bearing |