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Gregg's keelpod

Stems

few to several, (1–)2–6(–7.5) dm, densely pubescent.

Basal leaves

petiole (0.7–)1.5–5(–7) cm;

blade obovate to spatulate or broadly oblong, (1–)2–8(–10) cm × (5–)10–40(–60) mm, base cuneate to truncate, apex acute to subobtuse, surfaces densely pubescent.

Cauline leaves

shortly petiolate or (distalmost) sessile;

blade similar to basal, 1–5.5(–6.5) cm × 5–25(–40) mm (smaller distally).

Racemes

0.5–4 cm.

Flowers

sepals (4–)5–8 × 1.5–2 mm;

petals (7–)8–11(–13) × (5–)6–9 mm, claw to 2 mm;

filaments 4–6 mm;

anthers 2.5–4 mm, (base strongly sagittate).

Fruiting pedicels

usually straight or upcurved, rarely slightly sigmoid, (4–)5–15(–20) mm.

Fruits

(0.7–)0.8–1.2(–1.5) cm × 5–8(–9) mm, apex deeply notched;

valves densely pubescent;

style 2–5 mm.

Seeds

1.5–2 × 1.2–1.7 mm.

2n

= 20.

Synthlipsis greggii

Phenology Flowering Oct–May.
Habitat Creosote bush-mesquite scrubland, grasslands, gravelly hillsides, rocky sandstone or limestone slopes, rocky flats, limestone rubble, gypsum of llano, calcareous gravel, sandy or loamy areas
Elevation 50-2400 m (200-7900 ft)
Distribution
from FNA
TX; Mexico (Chihuahua, Coahuila, Durango, Hidalgo, Nuevo León, San Luis Potosí, Tamaulipas, Zacatecas)
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Discussion

Synthlipsis greggii is known from Brewster, Hidalgo, and Zapata counties.

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

Source FNA vol. 7, p. 666.
Parent taxa Brassicaceae > tribe Physarieae > Synthlipsis
Synonyms S. greggii var. hispidula
Name authority A. Gray: Mem. Amer. Acad. Arts, n. s. 4: 116. (1849)
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