USA, Arizona, Coconino County, Grand Canyon National Park, along Royal Arch trail west of South Bass trail, on Esplanade, 12S 374812 E, 4006125 N, NAD 83/84
Frequent, stems 1, trunk 1/3 m tall, leaves wide, stalk 1-1/3 m tall, inflorescence down 1/2 - 2/3 of stalk, paniculate below, racemose above, widest at middle, flower 54 (l) x 62 (w) mm, tepal fusion 4 mm high, outer tepal 48 x 15 mm, cream-white with light green midstripe, inner tepal 48 x 23 mm, cream-white, slightly light green at base, filament 12+7.5 mm high, white, anthers yellow, ovary 19 mm, light green, style 11 mm, cream-white.