Daleae Imagines page 783 plate XCV

  • Title

    Daleae Imagines page 783 plate XCV

  • Creator(s)

    R. C. Barneby

  • Publisher

    The New York Botanical Garden Press

  • Description

    PLATE XCV Dalea leucosericea (Rydb.) Standi. & Steyerm. and D. bacchantum Barneby are shrubby or at least suffruticose daleas of southern Mexico, flowering in fall and winter; both have copiously pubescent foliage, 3-6 pairs of relatively large leaflets, and bicolored flowers, the banner opening whitish but rubescent, the inner petals pink or purple. The stems of D. leucosericea are usually virgate and little branched below the panicle, the foliage lustrously pilose and silvery at least when young, and the spikes although dense are flexible and hardly conelike. The species is locally common on limestone and pumice soils between 1100 and 1900 m, especially in arid, eroded places, in the valleys of central and northwestern Oaxaca, and extends northeast into the Atoyac-Mixteca lobe of the Balsas depression in southwestern Puebla and adjoining Morelos. The leaves of D. bacchantum are densely pilose but greenish, and the spikes are contracted into hard cones. At the only known locality on the volcanic knobs about the village of Tepoztlan in Morelos, D. bacchantum is found chiefly on ledges and crevices of volcanic cliffs, where it forms open, freely branching shrubs up to two meters tall. Inflorescences × 1; the rest × 5. D. leucosericea: 1) top of flowering stem; 2) stipules; 3) bract, ventral view; 4) flower + bract; 5) calyx, laid open; 6) banner, ventral and profile views; 7) androecium; 8) keel; 9) pod. D. bacchantum: 1) branchlet central and terminal to panicle; 2) stipules; 3) leaflet, dorsal view; 4) flower + bract; 5) calyx, laid open; 6) banner, ventral and profile views; 7) keel; 8) androecium.

  • Taxonomy

    Dalea leucosericea (Rydb.) Standl. & Steyerm.

    Dalea bacchantum Barneby

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  • Cite This Image

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  • Image Type

    Illustration