Colorado 7/21 Choripora tenella Fls, lavender, field and roadside, Byers, Arapahoe County, Colo. April 19, '71. fds fixed with F.A. Staplen 7/22 Erigeron asperum roadside, 12 miles north of Pueblo, Pueblo County, Colo., April 20, 1971 des fixed n = 18 L. Riidenberg 7/23 Besquerella montana (Gray) Wats. limestone chip, roadside hill, 7 1/2 miles south of the south city limits of Pueblo, Pueblo Co., April 20 biennial or short-lived perennial sepals erect n = 5 det L. Riidenberg des fixed 7/24 Besquerella calcicola Rollins limy soft soil among piñon- juniper, 14 miles south of Pueblo, Pueblo County, April 20 des fixed n = 8 L. Riidenberg