Dasylirion wheeleri

S. Watson ex Rothrock

Rep. U.S. Geogr. Surv., Wheeler, 272. 1878

Common names: Desert spoon
Treatment appears in FNA Volume 26. Treatment on page 422. Mentioned on page 421, 423.
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Illustrator: Bee F. Gunn
Plants robust, with large crowns, to 40 cm diam.; trunks to 1.5 m, usually reclining. Leaves stout, rigid; blade whitish or bluish green, 35–100 × 2–3 cm wide above broadened base, densely waxy-glaucous, papillose, dull; prickles all antrorse. Inflorescences often massive, to 5 m; stalk 3–6 diam. at base; branches lateral, pendent in fruit, 3–10 cm; bracts wedge-shaped, attenuate; fascicles of flowers spreading, 10–20 cm from base to tip; primary axes 4–14 cm. Flowers with receptacles 0.2–0.5 mm; tepals sometimes tinged purple, 2.4 × 1–1.5 mm; style 0.2–0.3 mm, becoming swollen and golden brown in fruit; stigma lobes 0.4 mm; pedicel 3–3.5 mm in fruit. Capsules broadly obovoid or rounded in cross section, not indented, 5–8 × 4–5(–7) mm; distal wing lobes 2–2.5 mm, often indented on side. 2n = 38.

Phenology: Flowering mostly late May–Jun.
Habitat: Open, rocky slopes
Elevation: 1200–1900 m

Distribution

V26 867-distribution-map.jpg

Ariz., N.Mex., Tex., Mexico (Chihuahua, Sonora).

Discussion

Morphologically, Dasylirion wheeleri is fairly uniform within its range in the United States, with some minor variation in fruit size and receptacle length.

References

None.

Lower Taxa

No lower taxa listed.