Daleae Imagines page 681 plate XLIV
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Title
Daleae Imagines page 681 plate XLIV
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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 XLIV Dalea exigua Barneby and D. plantaginoides Barneby, stiffly erect, simple or few- branched herbs 1-4.5 dm tall, have sharply angled stems, green leaves dotted beneath, and dense spikes of persistent bracts terminal to all leafy axes. Both species inhabit open oak or pine forest and bear their tiny, caducous flowers during the late summer and fall months. The leaflets of D. exigua are thinly ciliate with long, weak, spiral hairs, the inner petals are vivid purple, and the androecium is reduced to 4-7 members of which only 4-6 bear fertile anthers. It is not uncommon in the northern Sierra Madre Occidental of central Chihuahua and adjoining Sonora and extends north to the headwaters of the Gila River in s.-w. New Mexico and s.-e. Arizona. The white-flowered D. plantaginoides is known only from three stations in n.-w. Michoacan and adjoining Jalisco, in the foothills of Volcan Tancitaro and vicinity. It has glabrous leaves, more shortly pointed calyx-teeth, and a full complement of ten stamens, all fertile. — Habit × 1; leaflets × 3; the rest × 10. D. exigua: 1) top of stem; 2) stipules; 3) upper three leaflets; 4) dorsal view of lower bract; 5) do., upper bract; 6) flower + bract; 7) banner, ventral and profile views; 8) inner petals; 9) androecium, showing summit with petals in situ; 10) fruiting calyx + pod. D. plantaginoides: 1) top of stem; 2) stipules; 3) pair of leaflets; 4) bracts, dorsal and profile views; 5) flower; 6) banner, ventral view; 7) androecium after anthesis.
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Taxonomy
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Copyright Statement
Copyright The New York Botanical Garden Press
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License Statement
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Image Type