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19b.3. Agave parryi var. couesii (Engelmann ex Trelease) Kearney & Peebles, J. Wash. Acad. Sci. 29: 474. 1939.
Coues agave
A. couesii Engelmann ex Trelease, Rep. (Annual) Missouri Bot. Gard. 22: 94, plates 94–97. 1911
Rosettes 3.5–5.5 × 4–6.5 dm. Leaves 25–42(–47) cm × 6.5–11 cm; blade ovate. Flowers 4.3–5.5(–6) cm; perianth tube 6–9 mm, limb lobes 13–21 mm; filaments 3.3–4.4 mm; ovary 2–3.4 cm. 2n = 120.
Flowering late spring--early summer. Gravelly places in grasslands, chaparral, pinyon-juniper, and oak woodlands; 1100--2100 m; Ariz.
Variety couesii hybridizes with A. chrysantha in Arizona.
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