Mentzelia jonesii (Urban & Gilg) H.J. Thompson & Roberts  
Family: Loasaceae
Jones' blazingstar,  more...
[Mentzelia nitens var. jonesii (Urban & Gilg) J. Darl.]
Mentzelia jonesii image
Patrick Alexander  
Plant: annual herb; to 60 cm tall Leaves: to 15 cm long, sessile, elliptic to lanceolate; margin toothed to pectinately lobed. BRACTS ovate to lanceolate or triangular, green, mostly not on ovary; margins few-toothed to entire INFLORESCENCE: cymose Flowers: sessile; petals yellow, 8-20 mm long, (3-)5-10 mm wide; staminodia 0; stamens ca. 30-50, all with linear filaments; style 5-10 mm long Fruit: capsules clavate, long-tapering to base; base not woody; body 20-38 mm long, S-shaped or arching to 180 degrees. SEEDS pendulous, not winged, those in upper half of capsule grain-like, several-faceted, irregular in cross-section, the angles sharp; testa cells with straight adjoining walls, the surface wall pointed-papillate Misc: Deserts to low chaparral; 200-1300 (-1600) m (600-4200 (-5300) ft); Jan-Jun Notes: capsules are s-shaped, arching 180 degrees.Leaves are pectinately toothed and surface is rough pubescent. References: Hickman, ed., The Jepson Manual. Christy, Charlotte M.; Loasaceae, Journal of the AZ-NV academy of Science.
Mentzelia jonesii image
Patrick Alexander  
Mentzelia jonesii image
Patrick Alexander  
Mentzelia jonesii image
Mentzelia jonesii image
John Alcock  
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