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Y. angustissima ssp. angustissima, Y. angustissima ssp. avia, Y. angustissima ssp. kanabensis, Y. angustissima ssp. toftiae
Y. arkansana ssp. arkansana, Y. arkansana ssp. freemanii, Y. arkansana ssp. louisianensis
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Y. baccata ssp. baccata, Y. baccata ssp. vespertina
Y. baileyi ssp. baileyi, Y. baileyi var. bella, Y. baileyi var. navajoa, Y. baileyi ssp. intermedia |
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Y. campestris, Y. cernua, Y. constricta |
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Y. elata ssp. elata, Y. elata ssp. utahensis, Y. elata ssp. verdiensis |
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Y. faxoniana, Y. filamentosa, Y. flaccida(smalliana, concava) |
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Y. glauca ssp. glauca(var. radiosa, f. montana), Y. glauca ssp. albertana, Y. glauca ssp. stricta(angustifolia, var. gurneyi),
Y. gloriosa |
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Y. harrimaniae ssp. harrimaniae, Y. harrimaniae ssp. gilbertiana, Y. harrimaniae ssp. neomexicana, Y. harrimaniae ssp. sterilis, Y. nana |
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Y. nana, Y. necopina |
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Y. pallida |
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Y. recurvifolia, Y. reverchonii, Y. rostrata, Y. rupicola |
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Y. x schottii (arizonica, baccata brevifolia, macrocarpa, puberula, treleasei, thornberi) |
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Y. thompsoniana |
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