Kingdom/Regno: Plantae (Plants/Piante)
Subkingdom/Sottoregno: Tracheobionta (Vascular plants/Piante vascolari)
Superdivision/Superdivisione: Spermatophyta (Seed plants/Piante con semi)
Division/Divisione: Magnoliophyta (Flowering plants/Piante con fiori)
Class/Classe: Liliopsida (Monocotyledons/Monocotiledoni)
Subclass/Sottoclasse: Liliidae
Order/Ordine: Liliales
Family/Famiglia: Agavaceae (Century-plant family)
Genus/Genere: Yucca L. (yucca)

Species/Specie:
1) Yucca acrotricha Schiede [Linnaea 4:230. 1829] (= Dasylirion acrotrichum (Schiede) Zucc.)
2) Yucca aloifolia L. [Sp. pl. 1:319. 1753] (P caesp) Jucca Spanish bayonet Bayonnette Yuca Iúca
3) Yucca angustifolia Pursh [S. Watson et al., Botany [fortieth parallel] 496. 1871 (in C. King, U.S. geol. explor. 40th Parallel vol. 5)] (= Yucca glauca Nutt.)
4) Yucca angustissima Engelm. ex Trel. [Rep. (Annual) Missouri Bot. Gard. 13:58, t. 23, fig. 1, t. 24, fig. 1, t. 83, fig. 6. 1902] Narrow-leaf yucca
5) Yucca australis (Engelm.) Trel. [Rep. (Annual) Missouri Bot. Gard. 3:162. 1892] Datile Palma grande
6) Yucca baccata Torr. [Trans. Acad. Sci. St. Louis 3:44. 1873] Spanish bayonet
7) Yucca baileyi
8) Yucca brevifolia Engelm. [J. Arnold Arbor. 16:269. 1935] Joshua tree
9) Yucca draconis L. [Sp. pl. 1:319 1753] (= Asparagus draco L.) (= Dracaena draco (L.) L.)
10) Yucca elata Engelm. [Bot. Gaz. 7:17. 1882] (= Yucca radiosa (Engelm.) Trel.) Soap tree
11) Yucca elephantipes Regel, nom. inval. [Gartenflora 9:35. 1859, pro syn.] (= Yucca guatemalensis Baker)
12) Yucca filamentosa L. [Sp. pl. 1:319. 1753] Spoonleaf yucca Yucca Yuca Yucca Vela-de-pureza
13) Yucca flaccida Haw. [Suppl. pl. succ. 34. 1819] Weak-leaf yucca
14) Yucca glauca Nutt. [Cat. pl. Upper Louisiana no. 89. 1813] (= Yucca angustifolia Pursh) Soapweed
15) Yucca gloriosa L. [Sp. pl. 1:319. 1753] (P caesp) Jucca Spanish dagger
16) Yucca guatemalensis Baker [Refug. Bot. 5: t. 313. 1872] (= Yucca elephantipes Regel) (= nom. inval.) Blue-stem yucca Izote
17) Yucca harrimaniae Trel. [Rep. (Annual) Missouri Bot. Gard. 13:59, t. 93, fig. 1. 1902] Spanish bayonet
18) Yucca macrocarpa Engelm. [Bot. Gaz. 6:224. 1881] (= Yucca schottii Engelm.)
19) Yucca newberryi McKelvey [Yuccas Southw. U.S. 2:49. 1947]
20) Yucca parviflora Torr. [W. H. Emory, Rep. U.S. Mex. bound. 2(1):221. 1858 ("1859")] (= Hesperaloe parviflora (Torr.) J. M. Coult.)
21) Yucca peninsularis McKelvey [Yuccas Southw. U.S. 2:52. 1947]
22) Yucca periculosa Baker [Gard. Chron. 1870:1088. 1870]
23) Yucca radiosa (Engelm.) Trel. [Rep. (Annual) Missouri Bot. Gard. 13:56. 1902] (= Yucca elata Engelm.)
24) Yucca rupicola Scheele [Linnaea 23:143. 1850] Twisted-leaf yucca
25) Yucca schidigera Roezl ex Ortgies [Gartenflora 20:110. 1871] Mojave yucca
26) Yucca schottii Engelm. [Trans. Acad. Sci. St. Louis 3:46. 1873] (= Yucca macrocarpa Engelm.) Schott yucca
27) Yucca torreyi Shafer [Britton & Shafer, N. Amer. trees 157, fig. 117. 1908] Spanish-dagger
28) Yucca whipplei Torr. [W. H. Emory, Rep. U.S. Mex. bound. 2(1):222. 1858 ("1859")] Our Lord's candle