Daleae Imagines page 791 plate XCIX
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Title
Daleae Imagines page 791 plate XCIX
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Creator(s)
R. C. Barneby
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Publisher
The New York Botanical Garden Press
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Description
PLATE XCIX Dalea bicolor Humb. & Bonpl. ex Willd. (continued on Plates C-CII) is a polymorphic assemblage of variably frutescent, fruticose or even subarborescent forms of wide dispersal through the temperate and desert regions of Mexico, reaching central Oaxaca s.-ward, western Texas and adjoining New Mexico n.-ward, and represented by endemic races in Baja California, but most abundant on the central Plateau and Sierras Madre. Characters common to all aspects of the species are verruculose stems, leaflets of moderate number never extremely small or fleshy, flowers sessile in the axils of persistent bracts, a relatively short-toothed calyx, and bicolored flowers, the banner opening whitish or pale yellow, the epistemonous petals pink, purple, less often violet or vivid blue. The var. bicolor, the variety dominant over the Mexican Plateau, presents so many aspects of stature, pubescence, leaflet-number, and flower- color, that no one plate can do it justice. The plants vary according to habitat from creeping, thymelike shrublets (fig. 3) found on the pumice plains in the foothills of Orizaba, through increasingly tall and bushy stature to treelets as much as 4 meters tall. The spike is usually loose, the calyces not so crowded as to conceal the central axis, but varies enormously in length; leaves may be green and minutely villosulous or ashen with loose dense hairs; calyx-teeth vary from deltate to triangular-acuminate; and all these variables may be combined in different ways. — Flowering branchlets × 1; the rest × 5. 1, 2, 3) branchlets with inflorescences of different lengths and densities; 4) stipules; 5, 5a) leaflets; 6) bract, ventral view; 7) flowers and calyces; 8) banner, ventral view; 9) wing; 10) androecium; 11) pod.
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Taxonomy
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Copyright Statement
Copyright The New York Botanical Garden Press
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License Statement
Image may not be reproduced without the permission of The New York Botanical Garden Press
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Cite This Image
Image may not be reproduced without the permission of The New York Botanical Garden Press
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Image Type