Daleae Imagines page 775 plate XCI

  • Title

    Daleae Imagines page 775 plate XCI

  • Creator(s)

    R. C. Barneby

  • Publisher

    The New York Botanical Garden Press

  • Description

    PLATE XCI Dalea cyanea Greene, a diffusely ascending, polypodial, perennial herb of local dispersal in the pine-oak belt of Sierra Madre Occidental in s.-w. Durango and n. Nayarit, where it is found in flower in late summer and fall. The plants differ greatly in density and distribution of the pubescence, the foliage varying from gray-pilose to bright green and glabrous, but even in the most nearly hairless forms some remnant of vesture can be found at base of the stem, on the leaf-stalks, or under the flower- heads. Notable features of the species are the dense, headlike spikes, the dimorphic bracts, the short-toothed, bell-shaped calyx deeply recessed behind the ample banner. The proportionately large and showy flowers open bicolored, the banner white or largely so, finally rubescent, the wings and keel brightly anthocyanic. The var. cyanea, known only from the east slope of the Sierra near the latitude of Ciudad Durango, has small bracts, and inner petals vivid blue. The poorly known var. fissa (Rydb.) Barneby, from the n. end of Sierra de Nayarit, has exceptionally large, castaneous bracts, and rose-purple wings and keel. — Stems × 1; the rest × 5. var. cyanea: 1) top of stem; 2) stipules; 3) leaflets; 4) outermost bract, dorsal view; 5) flower + inner bract, twisted to show glabrous ventral face; 6) calyx, laid open; 7) banner, ventral and profile views; 8) wing; 9) keel; 10) androecium; 11) pod. var. fissa: 1) flowering branchlet; 2) stipules; 3) leaflets in sleeping posture; 4) lower bract, dorsal view; 5) inner bract, ventral view; 6) flower; 7) keel; 8) calyx, laid open.

  • Taxonomy

    Dalea cyanea Greene

    Dalea cyanea var. fissa (Rydb.) Barneby

    Dalea cyanea Greene var. cyanea

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    Copyright The New York Botanical Garden Press

  • License Statement

    Image may not be reproduced without the permission of The New York Botanical Garden Press

  • Cite This Image

    Image may not be reproduced without the permission of The New York Botanical Garden Press

  • Image Type

    Illustration