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Westwater tumble-mustard

Habit Annuals or biennials; pilose throughout or at least basally.
Stems

branched basally and distally, 1.5–8.5(–12) dm, (sparsely to densely pilose basally or throughout, trichomes crisped).

Basal leaves

(soon withered); rosulate;

petiole 0.5–2.5(–5) cm;

blade oblanceolate, 1–5.8 cm × 5–22 mm, margins entire or dentate, (surfaces glabrous or pilose abaxially).

Cauline leaves

sessile;

blade ovate to oblong, base auriculate, margins usually entire, rarely dentate, (surfaces glabrous or pilose abaxially).

Racemes

dense.

Flowers

sepals usually erect to ascending, rarely spreading, purplish to lavender or whitish, 4–7 × 1.2–2 mm;

petals pale purple to white, spatulate, 7.5–14 × 3–5 mm, (margins not crisped), claw 4–8 mm;

median filament pairs 4–8 mm;

anthers linear, 2.5–4 mm;

gynophore (stout), 0.3–1.5 mm.

Fruiting pedicels

divaricate, straight or slightly upcurved, (3.5–)5–16 mm, (glabrous or sparsely pilose).

Fruits

divaricate-ascending to spreading, straight or curved, torulose, 4–8(–9) cm × 1.2–1.5 mm; (valves glabrous or pilose);

ovules 46–94 per ovary;

style often clavate, 1–3 mm;

stigma strongly 2-lobed.

Seeds

1.2–1.5 × 0.8–1 mm.

Thelypodiopsis elegans

Phenology Flowering Apr–Jun.
Habitat Shale grounds, loose gypsum, barren areas, clay banks of rocky hillsides, shrub communities
Elevation 1400-2400 m (4600-7900 ft)
Distribution
from FNA
AZ; CO; UT; WY
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 7, p. 726.
Parent taxa Brassicaceae > tribe Thelypodieae > Thelypodiopsis
Sibling taxa
T. ambigua, T. aurea, T. divaricata, T. juniperorum, T. purpusii, T. shinnersii, T. vaseyi, T. vermicularis
Synonyms Thelypodium elegans, Sisymbrium elegans, Streptanthus wyomingensis, T. bakeri, T. wyomingensis, Thelypodium bakeri
Name authority (M. E. Jones) Rydberg: Bull. Torrey Bot. Club 34: 432. (1907)
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