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Las Vegas tumblemustard

Rio Grande tumblemustard

Habit Annuals; (often glaucous), glabrous throughout. Annuals; (often glaucous), glabrous throughout.
Stems

unbranched or branched distally, 3–10 dm.

unbranched or branched distally, 3.5–8 dm.

Basal leaves

(soon withered);

not rosulate;

blade oblong to lanceolate or oblanceolate, 3–6 cm × 5–15 mm, margins usually entire, rarely denticulate.

(soon withered);

not rosulate;

petiole (winged), 0.5–3.5 cm;

blade pandurate to broadly obovate, 2–10 cm × 10–50 mm, margins entire or repand.

Cauline leaves

sessile;

blade (proximalmost) oblong to lanceolate or oblanceolate, or (distal) linear to narrowly oblong or lanceolate, base auriculate, margins usually entire, rarely denticulate.

(proximalmost) petiolate or (distal) sessile;

blade (proximalmost) pandurate to broadly obovate or (distal) obovate, base auriculate, margins entire or repand.

Racemes

lax.

lax.

Flowers

sepals spreading, whitish or purplish, 1.8–2.5 × 0.7–1 mm;

petals white, obovate to spatulate, 2.5–4.5 × 1.7–2.5 mm, claw 1–1.5 mm;

median filament pairs 1.7–2.5 mm;

anthers ovate, 0.5–0.8 mm;

gynophore 0.2–0.4 mm.

sepals erect, purplish, 2.5–3.5 × 0.7–1 mm;

petals white, narrowly oblanceolate, 3.5–4.5 × 1–1.2 mm, claw not developed;

median filament pairs 1.5–2.5 mm;

anthers ovate-oblong, 0.7–1 mm;

gynophore 0.2–0.4 mm.

Fruiting pedicels

horizontal to divaricate, straight or slightly recurved, (slender), 7–15 mm.

often divaricate, sometimes ascending, straight, 4–13 mm.

Fruits

erect to ascending, straight or curved, strongly torulose, 1.5–2.5 cm × 1–1.2 mm;

ovules 20–32 per ovary;

style cylindrical, 0.5–0.8 mm;

stigma obscurely 2-lobed.

divaricate to ascending, straight or curved, obscurely torulose, 3.2–7.5 cm × 0.9–1.2 mm;

ovules 60–102 per ovary;

style subclavate, 0.4–2.5 mm;

stigma entire.

Seeds

1–1.5 × 0.7–0.9 mm.

0.9–1.1 × 0.5–0.7 mm.

2n

= 20.

Thelypodiopsis vaseyi

Thelypodiopsis shinnersii

Phenology Flowering Jul–Aug. Flowering Apr–Oct.
Habitat Open wooded slopes, mixed coniferous forests, canyons Canyon sides, rocky arroyo floors, chaparral thickets, scrubs, dry banks
Elevation 1900-2500 m (6200-8200 ft)
Distribution
from FNA
NM; TX
[WildflowerSearch map]
[BONAP county map]
from FNA
TX; Mexico (Tamaulipas)
[BONAP county map]
Discussion

Thelypodiopsis vaseyi is known from Lincoln, Otero, and San Miguel counties in New Mexico and Culberson County in Texas. R. C. Rollins (1982b, 1993) did not record it from Texas; the first report from there is based on Johnston 3148 (MO), collected in Guadalupe Mountains. Sisymbrium watsonii Payson is an illegitimate name that pertains to S. vaseyi.

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

Thelypodiopsis shinnersii is known from Cameron County.

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

Source FNA vol. 7, p. 727. FNA vol. 7, p. 727.
Parent taxa Brassicaceae > tribe Thelypodieae > Thelypodiopsis Brassicaceae > tribe Thelypodieae > Thelypodiopsis
Sibling taxa
T. ambigua, T. aurea, T. divaricata, T. elegans, T. juniperorum, T. purpusii, T. shinnersii, T. vermicularis
T. ambigua, T. aurea, T. divaricata, T. elegans, T. juniperorum, T. purpusii, T. vaseyi, T. vermicularis
Synonyms Sisymbrium vaseyi Sisymbrium shinnersii
Name authority (S. Watson ex B. L. Robinson) Rollins: Contr. Gray Herb. 206: 12. (1976) (M. C. Johnston) Rollins: Contr. Gray Herb. 206: 13. (1976)
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