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Long Valley tumble-mustard

Habit Annuals or biennials; (glaucous), glabrous throughout.
Stems

branched distally, (3–)5–10 dm.

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.

Cauline leaves

sessile;

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

Racemes

lax or 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.

Fruiting pedicels

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

Seeds

1.2–1.5 × 0.8–1.2 mm.

2n

= 22.

Thelypodiopsis ambigua

Phenology Flowering Mar–Jun.
Habitat Pinyon-juniper desert shrub communities, dry hillsides
Elevation 800-1600 m (2600-5200 ft)
Distribution
from FNA
AZ; 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.)

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