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Durango tumblemustard

Habit Annuals or perennials; (short-lived); (glaucous), glabrous or sparsely pubescent basally.
Stems

branched basally and distally, (1.4–)2–5(–6) dm, (glabrous or sparsely pubescent basally).

Basal leaves

rosulate;

petiole 0.5–4 cm;

blade oblanceolate, 2–7 cm × 5–22 mm, margins irregularly dentate.

Cauline leaves

sessile;

blade lanceolate to oblong, (smaller distally), base auriculate, margins entire, (surfaces glabrous).

Racemes

dense.

Flowers

sepals spreading to reflexed, yellow, 5–7.5(–8.5) × 1.7–2.5 mm;

petals yellow, spatulate to broadly oblong, 7–11(–13) × 2–3.5 mm, claw 5–7 mm (to 2 mm wide);

median filament pairs 5–6.5 mm;

anthers linear, 3–4 mm;

gynophore (slender), 2–6(–8) mm.

Fruiting pedicels

divaricate-ascending, straight, (5–)6.6–13(–15) mm.

Fruits

erect to divaricate-ascending, straight or slightly curved, torulose, 5–7.5(–9) cm × 1.2–1.7 mm;

ovules 72–98 per ovary;

style subclavate, 0.5–2 mm;

stigma 2-lobed.

Seeds

1.2–1.5 × 0.6–0.8 mm.

2n

= 22.

Thelypodiopsis aurea

Phenology Flowering Apr–May.
Habitat Shrub communities on clay or, rarely, sandy soil
Elevation 1200-2200 m (3900-7200 ft)
Distribution
from FNA
CO; NM; UT
[WildflowerSearch map]
[BONAP county map]
Discussion

Thelypodiopsis aurea is restricted to the Four Corners area and is known only from Montezuma County in Colorado, Sandoval and San Juan counties in New Mexico, and San Juan County in Utah.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 7, p. 725.
Parent taxa Brassicaceae > tribe Thelypodieae > Thelypodiopsis
Sibling taxa
T. ambigua, T. divaricata, T. elegans, T. juniperorum, T. purpusii, T. shinnersii, T. vaseyi, T. vermicularis
Synonyms Thelypodium aureum, Sisymbrium aureum
Name authority (Eastwood) Rydberg: Bull. Torrey Bot. Club 34: 432. (1907)
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