Daleae Imagines page 787 plate XCVII
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Title
Daleae Imagines page 787 plate XCVII
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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 XCVII Dalea pulchra Gentry and D. gypsophila Barneby both have prominently warty stems, but little else in common. The fully grown plant of D. pulchra is a twiggy bush up to 1 m tall and about as broad, its branches scantily clothed with small, drought- deciduous, silvery-pubescent leaves. The many, very dense, subglobose spikes of rose-purple flowers expand in spring (mostly March to May), and the majority are borne on short or subobsolete branchlets axillary to the primary leaves, which form in late summer and are shed during the winter. The range of D. pulchra lies in the grama grasslands transitional to oak woodland around the edge of the Sonoran Desert in s. Arizona (Pima and Santa Cruz counties), where it is locally common, and in Sonora, where seldom collected although extending s. to ± 28° N. The dwarf, suffruticose D. gypsophila spreads into low, thicket-like patches by means of adventitiously rooting woody branches. It is glabrous below the spikes, but the green, prominently tuberculate leaflets are minutely papillate. The loose flower-spikes are borne aloft on densely leafy stems up to ± 2 dm long; the banner opens yellowish but quickly fades livid, and the inner petals are deep plum-purple. The species is confined to gypseous soils at ± 1850-2100 m in pine-pinyon forest of the Sierra Madre Oriental in the districts of Galeana and adjoining Aramberri, s. Nuevo Leon, where it flowers intermittently from midsummer onward until frost.— Habit × 1; pod (of D. gypsophila) × 10; the rest × 5. D. pulchra: 1) flowering branch + main cauline leaf; 2) stipules; 3) leaflets; 4) outer bracts, ventral and dorsal views; 5) inner bracts, ventral and dorsal views; 6) flower; 7) calyces; 8) banner, ventral and profile views; 9) wing; 10) keel; 11) androecium. D. gypsophila: 1) flowering stem; 2) leaflets; 3) bracts, profile and dorsal views; 4) flower; 5) banner, ventral view; 6) wing; 7) keel; 8) androecium; 9) 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
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Image Type