Daleae Imagines page 789 plate XCVIII
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Title
Daleae Imagines page 789 plate XCVIII
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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 XCVIII Dalea dorycnioides DC. and D. piptostegia Barneby, small Mexican shrubs of bushy habit, up to 1 m tall but often less, lavishly floriferous in late summer and fall. Features common to both are many repeatedly branching stems, prominently granular-verrucose when young; 2-4 pairs of leaflets; short-toothed, pilosulous but not plumose calyces; and bicolored flowers, the whitish or pale yellow (finally rubescent) banner contrasting with rose-purple wings and keel. Both species vary greatly in density of pubescence; the leaves may be green, gray, or velvety-white, the leaflets small and crowded or larger and separate along the leaf-stalk. The rather common D. dorycnioides is at once xerophytic and calciphile, dispersed at ± 1200-2400 m along the intermontane valleys and w. slope of Sierra Madre Oriental from central Nuevo Leon to Hidalgo, w. through the limestone desert mountains to valley of Rio Nazas in n.-e. Durango, and is apparently isolated in central Oaxaca. It has dense, mostly globose, conelike spikes, and each flower is subtended by a broad, firm, persistent bract. The habitally similar D. piptostegia, which is known only from andesitic bedrock in the mountains of s.-w. Puebla and immediately adjoining Oaxaca, differs in its longer, looser and therefore soft flower-spikes from which the narrow, submembranous bracts are cast off as the buds expand. — Habit + associated but detached cauline leaves of D. dorycnioides × 1; the rest × 5. D. dorycnioides: 1) top of flowering branchlet + large and small extreme forms of cauline leaf; 2) stipules; 3) bract, ventral view; 4) flowers + bract; 5) calyx, laid open; 6) banner, ventral view; 7) wing; 8) keel; 9) androecium. D. piptostegia: 1) top of flowering branchlet; 2) stipules; 3) bracts, dorsal view of outer one at left, ventral view of inner one at right; 4) flower + bract; 5) calyx, laid open; 6) banner, ventral and profile views; 7) wing; 8) keel; 9) androecium.
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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
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Image Type