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white sands fanmustard

Habit Plants with woody caudex; moderately to densely pubescent.
Stems

(0.5–)1–4 dm, woody proximally, densely to moderately pubescent.

Cauline leaves

sessile or nearly so;

blade linear to linear-oblanceolate, 1.5–7 cm × 1–4.5 mm, (fleshy), base attenuate, margins usually entire, rarely dentate, apex acute to obtuse.

Racemes

to 3.5 dm in fruit.

Flowers

sepals broadly lanceolate to ovate, 4.8–7.5 × 1–2 mm;

petals obovate to spatulate, 8–12(–13) × 5–8.5 mm, (often flattened), claw to 2 mm, (margin dentate);

filaments 4–6 mm;

anthers 2.5–3.5 mm.

Fruiting pedicels

0.6–1.4 cm, densely pubescent.

Fruits

terete to slightly angustiseptate, 0.9–3 cm × 1–2.2 mm;

ovules 30–80 per ovary;

style 0.9–4 mm.

Seeds

0.5–0.7 × 0.4–0.5 mm.

2n

= 18, 19, 20, 34, 36.

Nerisyrenia linearifolia

Phenology Flowering Apr–Dec.
Habitat Gypsum soils in knolls, bluffs, open flats
Elevation 1000-1200 m (3300-3900 ft)
Distribution
from FNA
NM; TX; Mexico (Coahuila, Nuevo León, San Luis Potosí, Tamaulipas)
[WildflowerSearch map]
[BONAP county map]
Discussion

Both J. D. Bacon (1978) and R. C. Rollins (1993) recognized two weakly defined varieties of Nerisyrenia linearifolia distinguished primarily on the position of the widest portion of the fruit. Of those, var. mexicana Bacon (Coahuila, Mexico) has fruits widest near the base instead of the middle.

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

Source FNA vol. 7, p. 610.
Parent taxa Brassicaceae > tribe Physarieae > Nerisyrenia
Sibling taxa
N. camporum
Synonyms Greggia linearifolia, Greggia camporum var. angustifolia, Greggia camporum var. linearifolia, Parrasia linearifolia
Name authority (S. Watson) Greene: Pittonia 4: 225. (1900)
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