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Long Valley tumble-mustard

Durango tumblemustard

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

branched distally, (3–)5–10 dm.

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

Basal leaves

rosulate;

petiole 0.3–3 cm;

blade oblanceolate, (1.5–)2.5–14.5(–20) cm × 10–30(–42) mm, margins dentate to subpinnatifid.

rosulate;

petiole 0.5–4 cm;

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

Cauline leaves

sessile;

blade lanceolate to oblong, base auriculate, margins usually entire, rarely dentate.

sessile;

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

Racemes

lax or dense.

dense.

Flowers

sepals erect, purple, 5–7.5 × 1.7–2.5 mm;

petals purple to lavender or white, spatulate, 10–14 × 1.2–1.7 mm, claw 4–6 mm;

median filament pairs 4–6 mm;

anthers linear, 3–4 mm;

gynophore (slender), 3–6(–9.5) mm.

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

horizontal to divaricate-ascending, often upcurved, 6–9 mm.

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

Fruits

ascending to divaricate or descending, straight or slightly recurved, torulose, 4.5–9 cm × 1.1–1.4 mm;

ovules 80–112 per ovary;

style cylindrical, (stout), 0.3–1 mm;

stigma 2-lobed.

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 × 0.8–1.2 mm.

1.2–1.5 × 0.6–0.8 mm.

2n

= 22.

= 22.

Thelypodiopsis ambigua

Thelypodiopsis aurea

Phenology Flowering Mar–Jun. Flowering Apr–May.
Habitat Pinyon-juniper desert shrub communities, dry hillsides Shrub communities on clay or, rarely, sandy soil
Elevation 800-1600 m (2600-5200 ft) 1200-2200 m (3900-7200 ft)
Distribution
from FNA
AZ; UT
[WildflowerSearch map]
[BONAP county map]
from FNA
CO; NM; UT
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Thelypodiopsis ambigua is known from Kane County in Utah and from Coconino, Mohave, and Yavapai counties in Arizona.

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

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. FNA vol. 7, p. 725.
Parent taxa Brassicaceae > tribe Thelypodieae > Thelypodiopsis Brassicaceae > tribe Thelypodieae > Thelypodiopsis
Sibling taxa
T. aurea, T. divaricata, T. elegans, T. juniperorum, T. purpusii, T. shinnersii, T. vaseyi, T. vermicularis
T. ambigua, T. divaricata, T. elegans, T. juniperorum, T. purpusii, T. shinnersii, T. vaseyi, T. vermicularis
Synonyms Thelypodium ambiguum, Sisymbrium ambiguum, T. ambigua var. erecta Thelypodium aureum, Sisymbrium aureum
Name authority (S. Watson) Al-Shehbaz: Contr. Gray Herb. 204: 138. (1973) (Eastwood) Rydberg: Bull. Torrey Bot. Club 34: 432. (1907)
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