Eastern Mojave Vegetation Coll. No. 1845, Sisymbrium altissimim  
 

 

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  Brassicaceae Sisymbrium altissimim
Photographed 6 November 2018.

Coll. No. 1845, 18 May 2018, characters observed: Annual terrestrial herb, to 50 mm.; Roots, tap; Stem, erect, branched above, leafy, few simple hairs; Leaves, basal and cauline, basal compound, (petiole short if at all present), 120 mm. × 28 mm. wide, oblong, pinnately divided, few simple hairs on petioles, mid-ribs, and margins; cauline, nearly sessile, lanceolate, very finely pinnately divided; Flowers, radial; Sepals, #4, rows, 1, 3.5-4.5 mm. × 0.8 mm. wide, small hood-shaped appendage at tip; Petals, 7 mm. × 1.5 mm. wide, margin, entire, color, yellow; Stamens, tetradynamous, 3.6, 5.2 mm.; Filaments, plain; Anthers, 2 mm.; Stigma, (weakly) 2-lobed; Fruit, 17 mm. × 0.5 mm. wide, ascending, glabrous.

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Date and time this page was prepared: 11/21/2019 4:06:27 PM