A N F Keys
1 Perennial herbs mostly 80−180 cm tall, typically with an erect principal shoot; flowers ± 95 mm across; petals 60−64 × 19−21 mm; stamens to 200 in 4 or 5 pseudowhorls, lacking staminodes, filaments 34−50 mm long; capsules 30−35 mm long .. Mentzelia laevicaulis [pics]
1' Annuals 10−80 cm tall, with an hemispheric canopy; flowers 4.5−6 mm across; petals 2.5−4(−4.5) × 1.5−1.8(−2) mm; stamens 10−20 in whorls of 5, the outer whorl = staminodes notched at tip, filaments 1.6−1.8 mm long; capsules 6−13 mm long .. Mentzelia micrantha [pics]
The text of the above keys used with permission from
A Naturalist's Flora of the Santa Monica Mountains and Simi Hills, California
© Copyright
Barry A. Prigge and Arthur C. Gibson
2013