NEVADA N. H. Holmgren, Brittonia 56: 240, fig. 1. 2004.
Ihsan A. Al-Shehbaz
Tribe: Boechereae Al-Shehbaz, Beilstein & E. A. Kellogg, Pl. Syst. Evol. 259: 111. 2006.
Name derivation: Nevada is a state in the United States.
Type species: Nevada holmgrenii (Rollins) N. H. Holmgren (based on Smelowskia holmgrenii Rollins).
Herbs, perennial with a caudex, cespitose. Trichomes simple. Multicellular glands absent. Stems erect, simple or branched above. Basal leaves petiolate, rosulate, simple, entire; cauline leaves sessile, not auriculate at base, entire. Racemes several-flowered, ebracteate, corymbose, elongated considerably in fruit; rachis straight, fruiting pedicels slender, ascending, persistent. Sepals oblong-ovate, free, caducous, erect, glabrous, equal, base of lateral pair not saccate. Petals white, erect, longer than sepals; blade obovate to spatulate, apex obtuse; claw obscurely differentiated from blade, glabrous, unappendaged, entire. Stamens 6, hardly exserted, slightly tetradynamous; filaments wingless, unappendages, glabrous, free; anthers ovate, obtuse at apex. Nectar glands confluent, subtending bases of all stamens, median glands present. Ovules 6–12 per ovary, placentation parietal. Fruits dehiscent siliques, linear to linear-lanceolate, terete, not inflated, unsegmented; valves papery, with an obscure midvein extending to middle, glabrous, not keeled, torulose, wingless, unappendaged; gynophore obsolete; replum rounded; septum complete, membranous, veinless; style distinct and to 0.5 mm, persistent; stigma capitate, entire, unappendaged. Seeds uniseriate, wingless, narrowly oblong, plump; seed coat not mucilaginous when wetted; cotyledons incumbent. x = 7.
Monospecific: United States (Nevada).