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The great yuccas, or "yucca palms," of southern California are chiefly Y. arborescens. They grow in the higher lands bordering the Mojave and adjacent deserts, reaching a height of 15 to 20 feet. The old plants are exceedingly weird and picturesque. Occasionally this species is transferred to gardens, but it is apparently not in the trade. This "Joshua tree" is now separated as Clistoyucca arborescens, Trelease; as it is not in cultivation, it need not be discussed further here except to say that Clistoyucca differs from Yucca in its very short style, fleshy incurved perianth, and spongy dry indehiscent fruit.
The great yuccas, or "yucca palms," of southern California are chiefly Y. arborescens. They grow in the higher lands bordering the Mojave and adjacent deserts, reaching a height of 15 to 20 feet. The old plants are exceedingly weird and picturesque. Occasionally this species is transferred to gardens, but it is apparently not in the trade. This "Joshua tree" is now separated as Clistoyucca arborescens, Trelease; as it is not in cultivation, it need not be discussed further here except to say that Clistoyucca differs from Yucca in its very short style, fleshy incurved perianth, and spongy dry indehiscent fruit.
Y. Draco – Y. flaccida X Y. aloifolia.— Y. karlsruhensis – Y. filamentosa X Y. glauca. — Y. rekowskiana –Y. filamentosa X Y. gloriosa. — Y. Whipplei - Hesperoyucca.
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