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FNA | Family List | FNA Vol. 7 | Brassicaceae | Physaria

44f. Physaria kingii (S. Watson) O’Kane & Al-Shehbaz subsp. latifolia (A. Nelson) O’Kane & Al-Shehbaz, Novon. 12: 325. 2002.

Lesquerella latifolia A. Nelson, Bot. Gaz. 42: 49. 1906; L. barnebyi Maguire; L. kingii (S. Watson) S. Watson subsp. latifolia (A. Nelson) Rollins & E. A. Shaw; L. kingii var. parvifolia (Maguire & A. H. Holmgren) S. L. Welsh & Reveal; L. occidentalis S. Watson var. parvifolia Maguire & A. H. Holmgren; L. wardii S. Watson; Physaria wardii (S. Watson) O’Kane & Al-Shehbaz

Plants prostrate, decumbent, or erect; trichomes with large tubercles throughout, ± flat across middle. Basal leaves: blade margins entire. Racemes not or somewhat secund, usually dense and compact, sometimes slightly elongated in fruit. Fruiting pedicels usually sigmoid. Petals usually yellow, sometimes cream-yellow, cream-white, or white. Fruits as wide as or longer than wide, apex rounded-acute; valves glabrous inside; septum complete; ovules 8-16 per ovary; style to 7 mm.

Flowering May-Jun. Gravelly loam soils, rocky basaltic slopes, limestone outcrops, ridges and flats, canyon bottoms, open pinyon-juniper woodlands; 2000-2500 m; Ariz., Calif., Nev., Utah; Mexico (Baja California).

Populations of subsp. latifolia with flowers cream-yellow, cream-white, or white are frequently encountered on the Kaibab Plateau of northern Arizona.


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