Epithets
| petasites | hat like |
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| petasitis | hat like |
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| petiolaris | with petioles (leaf stalks) |
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| petiolata | with petioles (leaf stalks) |
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| petiolatus | with petioles (leaf stalks) |
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| petraea | growing with rocks |
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| petraeus | growing with rocks |
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| petrophila | rock-loving |
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| petrophilum | rock-loving |
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| petrosum | growing in very rocky conditions |
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| petrosus | growing in very rocky conditions |
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| phaea | dusky, gray |
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| phaeum | dusky, gray |
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| phalaenopses | moth-like |
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| phalaenopsis | moth-like |