Daleae Imagines page 705 plate LVI

  • Title

    Daleae Imagines page 705 plate LVI

  • Creator(s)

    R. C. Barneby

  • Publisher

    The New York Botanical Garden Press

  • Description

    PLATE LVI Dalea Candida Michaux ex Willdenow, the most widely dispersed of the prairie- clovers, has glabrous stems and leaves, dark green or pallid and inconspicuously dotted, and in summer, well above the foliage, tassels of white petals sparked with golden anthers. The species if variable in habit of growth, with either erect or diffuse herbaceous stems 3-10 dm long, usually branched above middle and several-headed, sometimes branched throughout, exceptionally simple. The eastern var. Candida, of rich lowlands in middle-western United States extending n. into e. Canada and s. to e. Texas, more rarely w. along rivers into the higher plains, has mostly erect, virgate stems and 3-4 pairs of ample leaflets in larger stem-leaves; the spike is always dense, the calyx always glabrous externally, and the bracts are commonly exserted beyond the buds. The var. oligophylla (Torrey) Shinners, a polymorphic assemblage of more xerophytic forms dispersed over the short-grass prairies from s. Canada to centr. Kansas and w. Texas, w. to Utah, Arizona, and Durango, and e. on bluffs well into the lowland range of var. Candida, differs principally in the looser spike. This is usually accompanied by fewer, smaller leaflets, shorter interfloral bracts, and often by an externally puberulent calyx. Note the bracteolar spicules (figs. 2, 10) which persist on the spike-axis of D. Candida after the calyx falls, a feature characteristic of ser. Candidae (Plates LIV-LVII). — Habit × 1; the rest × 5. var. Candida: 1) segment of mid-stem and terminal spike; 2) segment of spike-axis; 3) interfloral bract, dorsal view; 4) flower at early anthesis + bract; 5) do. at late anthesis; 6) banner, ventral view. var. oligophylla: 7) segment of mid-stem and part of panicle; 8) stipules; 9) bracts, dorsal view; 10) segment of spike-axis; 11) flower + bract, as early anthesis; 12) calyx; 13) petals, from different flowers; 14) fruiting calyces; 15) pod.

  • Taxonomy

    Dalea candida Michx. ex Willd.

    Dalea candida Willd. var. candida

    Dalea candida var. oligophylla (Torr.) Shinners

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  • Cite This Image

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  • Image Type

    Illustration