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Nerisyrenia camporum (Gray) Greene
Family: Brassicaceae
[Greggia camporum A.Gray]
Nerisyrenia camporum image
Patrick Alexander  
Plants with woody caudex; moderately to densely pubescent or glabrate. Stems 1-6 dm, woody proximally, pubescent or glabrate with age. Cauline leaves: petiole 0.3-1.5 cm, often not sharply differentiated from blade, or (distal) sessile; blade usually obovate to spatulate or oblanceolate, rarely elliptic, 1-4(-4.5) cm × (4-)7-20(-30) mm (not fleshy), base attenuate, margins dentate, repand, or entire, apex acute to obtuse. Racemes 3.5 dm. Fruiting pedicels (rarely recurved), (7-)10-20 mm, densely pubescent. Flowers: sepals (spreading) oblong to oblong-lanceolate, 5-9 × 1-2 mm; petals obovate, (8-)10-14(-15) × 5-9 mm, claw (often flattened, margin dentate) to 2 mm; filaments 4.5-7.5 mm; anthers 2-3.5 mm. Fruits angustiseptate, 1.5-3 (-4) cm × 1.5-3(-4) mm; ovules 40-100 per ovary; style (1.5-)2-3.8(-4.3) mm. Seeds 0.8-1.1 × 0.5-0.7 mm. 2n = 18, 19, 21, 22, 27, 32, 34, 36, 40, 41, 58. Flowering year-round, mostly Feb-Sep. Clay flats, gypseous clay, gravelly knolls, hillsides, sandy washes; 200-1300 m; N.Mex., Tex.; Mexico (Chihuahua, Coahuila, Durango, Nuevo León, Tamaulipas, Zacatecas).
FNA 2010, Correll and Johnston 1970, Allred and Ivey 2012
Duration: Perennial Nativity: Native Lifeform: Forb/Herb, Subshrub General: Perennial herb to subshrub, 10-60 cm tall, from a branching woody caudex; stems woody near the base in older individuals, erect or ascending, branching above the base; herbage densely and finely whitish-pubescent with branching (dendritic) hairs, becoming glabrate with age. Leaves: Leaves alternate along the stems, tapering at the base into petioles 3-15 mm long; blades obovate to oblanceolate, 1-4 cm long, 4-30 mm wide, the margins wavy, toothed, or entire. Flowers: Showy and white to lavender, in terminal racemes up to 35 cm long, which are congested in flower and elongate in fruit; pedicels densely pubescent, 1-2 cm long, ascending in flower and ascending to spreading when in fruit, or rarely recurved; sepals 4, spreading, 5-9 mm long; petals 4 in a cross formation, obovate, 8-15 cm long and 5-9 mm wide, white and fading lavender. Fruits: Capsules linear-oblong with obtuse bases and tips, 1-3 cm long and 2-3 mm wide, straight or slightly curved, dorsally compressed (so that the septum is visible running along the center of both flattened sides), densely whitish pubescent, topped with a per Ecology: Found on limestone knolls and hills, clay flats, gypseous clay, and in gravelly and sandy soils on plains and in washes, below 4,500 ft (1372 m); flowers year-round, but mostly February to September. Distribution: NM and TX; south to ne MEX Notes: If seen while in flower, this attractive perennial mustard can be easily recognized by its showy, 4-petaled white flowers which fade to an attractive lavender as they begin to dry out. The leaves and stems are covered with a fine layer of branched hairs, which gives the plant a whitish tint, although older plants may be less hairy. It has oblong, toothed leaves and the seed pods are about 2 cm long and slightly flattened on the longitudinal axis. Look for it in limestone, gypsum, and clay soils. Distinguish from N. linearifolia by the leaf width (5-20 mm in N. camporum and only 1-3 mm in N. linearifolia). Also, N. linearifolia is pubescent but the hairs do not give it a whitish or grayish cast as in this species. Ethnobotany: Unknown Etymology: Nerisyrenia comes from the Greek neros, flowing, and Syrenia, a genus of mustards from eastern Europe and central Asia, presumably alluding to a resemblance; camporum means growing on the plains. Editor: AHazelton 2017
Nerisyrenia camporum image
Patrick Alexander  
Nerisyrenia camporum image
Patrick Alexander  
Nerisyrenia camporum image
Patrick Alexander  
Nerisyrenia camporum image
Patrick Alexander  
Nerisyrenia camporum image
Patrick Alexander  
Nerisyrenia camporum image
Patrick Alexander  
Nerisyrenia camporum image
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