Yucca angustissima Engelm. ex Trel. | | a | | Yucca angustissimaEngelm. ex Trel. | |
Yucca elata Engelm. | | a | | Yucca elataEngelm. | |
Yucca filamentosa L. | | a | | Yucca filamentosaL. | |
Yucca flaccida Haw. | | a | | Yucca flaccidaHaw. | |
Yucca glauca Nutt. | | a | | Yucca glaucaNutt. | |
Yucca harrimaniae Trel. | | a | | Yucca harrimaniaeTrel. | |
Yucca rupicola Scheele | | a | | Yucca rupicolaScheele | |
Yucca radiosa (Engelm.) Trel. | Yucca elata Engelm. | | | Yucca radiosa(Engelm.) Trel. | Yucca elataEngelm. |
Yucca angustifolia Pursh var. radiosa Engelm. | Yucca elata Engelm. var. elata | | i | Yucca angustifoliaPursh var.radiosa Engelm. | Yucca elataEngelm. var.elata |
Yucca angustifolia Pursh | Yucca glauca Nutt. | | | Yucca angustifoliaPursh | Yucca glaucaNutt. |
Yucca baileyi Wooton & Standl. | | a | | Yucca baileyiWooton & Standl. | |
Yucca acrotricha Schiede | Dasylirion acrotrichum (Schiede) Zucc. | | | Yucca acrotrichaSchiede | Dasylirion acrotrichum(Schiede) Zucc. |
Yucca constricta Buckley | | a | | Yucca constrictaBuckley | |
Yucca elata Engelm. var. elata | | a | i | Yucca elataEngelm. var.elata | |
Yucca elata Engelm. var. verdiensis (McKelvey) Reveal | | a | i | Yucca elataEngelm. var.verdiensis (McKelvey) Reveal | |
Yucca verdiensis McKelvey | Yucca elata Engelm. var. verdiensis (McKelvey) Reveal | | | Yucca verdiensisMcKelvey | Yucca elataEngelm. var.verdiensis (McKelvey) Reveal |
Yucca angustissima Engelm. ex Trel. var. angustissima | | a | i | Yucca angustissimaEngelm. ex Trel. var.angustissima | |
Yucca angustissima Engelm. ex Trel. var. avia Reveal | | a | i | Yucca angustissimaEngelm. ex Trel. var.avia Reveal | |
Yucca angustissima Engelm. ex Trel. var. toftiae (S. L. Welsh) Reveal | | a | i | Yucca angustissimaEngelm. ex Trel. var.toftiae (S. L. Welsh) Reveal | |
Yucca toftiae S. L. Welsh | Yucca angustissima Engelm. ex Trel. var. toftiae (S. L. Welsh) Reveal | | | Yucca toftiaeS. L. Welsh | Yucca angustissimaEngelm. ex Trel. var.toftiae (S. L. Welsh) Reveal |
Yucca angustissima Engelm. ex Trel. var. kanabensis (McKelvey) Reveal | | a | i | Yucca angustissimaEngelm. ex Trel. var.kanabensis (McKelvey) Reveal | |
Yucca kanabensis McKelvey | Yucca angustissima Engelm. ex Trel. var. kanabensis (McKelvey) Reveal | | | Yucca kanabensisMcKelvey | Yucca angustissimaEngelm. ex Trel. var.kanabensis (McKelvey) Reveal |
Yucca elata Engelm. subsp. verdiensis (McKelvey) Hochstätter | Yucca elata Engelm. var. verdiensis (McKelvey) Reveal | | i | Yucca elataEngelm. subsp. verdiensis (McKelvey) Hochstätter | Yucca elataEngelm. var.verdiensis (McKelvey) Reveal |
Yucca elata Engelm. subsp. utahensis (McKelvey) Hochstätter | Yucca utahensis McKelvey | | i | Yucca elataEngelm. subsp. utahensis (McKelvey) Hochstätter | Yucca utahensisMcKelvey |
Yucca utahensis McKelvey | | a | | Yucca utahensisMcKelvey | |
Yucca angustissima Engelm. ex Trel. subsp. toftiae (S. L. Welsh) Hochstätter | Yucca angustissima Engelm. ex Trel. var. toftiae (S. L. Welsh) Reveal | | i | Yucca angustissimaEngelm. ex Trel. subsp. toftiae (S. L. Welsh) Hochstätter | Yucca angustissimaEngelm. ex Trel. var.toftiae (S. L. Welsh) Reveal |
Yucca angustissima Engelm. ex Trel. subsp. kanabensis (McKelvey) Hochstätter | Yucca angustissima Engelm. ex Trel. var. kanabensis (McKelvey) Reveal | | i | Yucca angustissimaEngelm. ex Trel. subsp. kanabensis (McKelvey) Hochstätter | Yucca angustissimaEngelm. ex Trel. var.kanabensis (McKelvey) Reveal |
Yucca angustissima Engelm. ex Trel. subsp. avia (Reveal) Hochstätter | Yucca angustissima Engelm. ex Trel. var. avia Reveal | | i | Yucca angustissimaEngelm. ex Trel. subsp. avia (Reveal) Hochstätter | Yucca angustissimaEngelm. ex Trel. var.avia Reveal |
Yucca neomexicana Wooton & Standl. | | a | | Yucca neomexicanaWooton & Standl. | |
Yucca harrimaniae Trel. var. neomexicana (Wooton & Standl.) Reveal | Yucca neomexicana Wooton & Standl. | | i | Yucca harrimaniaeTrel. var.neomexicana (Wooton & Standl.) Reveal | Yucca neomexicanaWooton & Standl. |
Yucca harrimaniae Trel. subsp. neomexicana (Wooton & Standl.) Hochstätter | Yucca neomexicana Wooton & Standl. | | i | Yucca harrimaniaeTrel. subsp. neomexicana (Wooton & Standl.) Hochstätter | Yucca neomexicanaWooton & Standl. |
Yucca reverchonii Trel. | | a | | Yucca reverchoniiTrel. | |
Yucca arkansana Trel. | | a | | Yucca arkansanaTrel. | |
Yucca arkansana Trel. subsp. arkansana | | a | i | Yucca arkansanaTrel. subsp. arkansana | |
Yucca arkansana Trel. subsp. louisianensis (Trel.) Hochstätter | | a | i | Yucca arkansanaTrel. subsp. louisianensis (Trel.) Hochstätter | |
Yucca louisianensis Trel. | Yucca arkansana Trel. subsp. louisianensis (Trel.) Hochstätter | | | Yucca louisianensisTrel. | Yucca arkansanaTrel. subsp. louisianensis (Trel.) Hochstätter |
Yucca baileyi Wooton & Standl. var. navajoa (J. M. Webber) J. M. Webber | Yucca baileyi Wooton & Standl. | | i | Yucca baileyiWooton & Standl. var.navajoa (J. M. Webber) J. M. Webber | Yucca baileyiWooton & Standl. |
Yucca thompsoniana Trel. | | a | | Yucca thompsonianaTrel. | |
Yucca faxoniana Sarg. | | a | | Yucca faxonianaSarg. | |
Yucca cernua E. L. Keith | | a | | Yucca cernuaE. L. Keith | |
Yucca campestris McKelvey | | a | | Yucca campestrisMcKelvey | |
Yucca pallida McKelvey | | a | | Yucca pallidaMcKelvey | |
Yucca rostrata Engelm. ex Trel. | | a | | Yucca rostrataEngelm. ex Trel. | |
Yucca angustissima Engelm. ex Trel. subsp. angustissima | Yucca angustissima Engelm. ex Trel. var. angustissima | | i | Yucca angustissimaEngelm. ex Trel. subsp. angustissima | Yucca angustissimaEngelm. ex Trel. var.angustissima |
Yucca angustifolia Pursh var. angustifolia | Yucca glauca Nutt. | | i | Yucca angustifoliaPursh var.angustifolia | Yucca glaucaNutt. |
Yucca baileyi Wooton & Standl. var. baileyi | Yucca baileyi Wooton & Standl. | | i | Yucca baileyiWooton & Standl. var.baileyi | Yucca baileyiWooton & Standl. |
Yucca elata Engelm. subsp. elata | Yucca elata Engelm. var. elata | | i | Yucca elataEngelm. subsp. elata | Yucca elataEngelm. var.elata |
Yucca harrimaniae Trel. var. harrimaniae | Yucca harrimaniae Trel. | | i | Yucca harrimaniaeTrel. var.harrimaniae | Yucca harrimaniaeTrel. |
Yucca harrimaniae Trel. subsp. harrimaniae | Yucca harrimaniae Trel. | | i | Yucca harrimaniaeTrel. subsp. harrimaniae | Yucca harrimaniaeTrel. |