Coreopsis delphiniflora.*—Height, 2 to 3 feet; first week of July; flowers, large, yellow, with dark centers and borne singly with long stems.
Coreopsis grandiflora.*—Height, 2 to 3 feet; fourth week of June; flowers, large, deep yellow, borne singly on long stems, blooming profusely throughout the summer.
Coreopsis lanceolata.*—Height, 2 feet; fourth week of June; flowers large though slightly smaller than the last, and borne on long stems, blooming throughout the season.†
Delphinium Cashmerianum.—Height, 1-1/2 feet; first week of July; flowers, pale to bright blue, in large open heads.†
Dianthus plumarius flore pleno.—Height, 9 inches; second week of June; flowers, large, white or pink, very sweet scented; and two or three borne on a stem. A variety called Mrs. Simkins is especially desirable, being very double, white and deliciously perfumed, almost equaling a carnation. It blooms the fourth week of June.
Dicentra spectabilis (Bleeding Heart).—Height, 3 feet; second week of May; flowers, heart-shaped, red and white in pendulous racemes.
Dictamnus albus.—Height, 1-1/2 to 2 feet; second week of June; flowers, white with an aromatic fragrance, and borne in large terminal racemes. A well-known variety has purple flowers with darker markings.
Doronicum Caucasicum.—Height, 1 foot; second week of May; flowers, large, yellow, and borne singly.
Doronicum plantagineum var. excelsum.—Height, 2 feet; third week of May; flowers, large and deep yellow.†
Epimedium rubrum.—Height, 1 foot; second week of May; flowers, small, bright crimson and white, borne in a loose panicle. A very dainty and beautiful little plant.