Daleae Imagines page 693 plate L
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Title
Daleae Imagines page 693 plate L
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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 L Dalea filiformis Gray and D. transiens Barneby are erect annuals germinating during summer rains and forming part of the late summer and fall flora of the northern Sierra Madre Occidental. Both are glabrous (or nearly so) below the finely pilosulous spikes of tiny lilac or reddish flowers, from which the bracts fall away before the petals expand. The leaves of D. filiformis, consisting of either three or five exactly linear, proportionately very long leaflets, distinguish the species at a glance; its keel-petals are united along the outer edges and enclose a decandrous androecium. The range of D. filiformis extends the length of the Sierra in Chihuahua and north around the edges of the Gila Basin through southwestern New Mexico and the Mogollon Rim to the Hualpai Mountains in western Arizona; also feebly across into Sonora and south to central Durango. The much rarer D. transiens is known only from the interior piedmont of the Sierra in central Durango, where it occurs in thin oak-woods transitional to the plateau grasslands. It differs from D. filiformis in having 2- 5 pairs of shorter, proportionately broader leaflets, the keel-parts free even in the bud, and an androecium reduced to five, six, or seven members. Inflorescence and habit × 1; leaflets of D. transiens (fig. 3) × 5; the rest × 10. D. filiformis: 1) habit; 2) tip of leaf-rachis + pedicels; 3) bracts, outer and inner, both profile view; 4) flower; 5) banner, ventral and profile views; 6) wings; 7) keel; 8) androecium; 9) fruiting calyx; 10) pod. D. transiens: 1) upper half of plant; 2) leaf-rachis + pedicels; 3) leaflets, dorsal and ventral views; 4) bract; 5) flower; 6) banner; 7) wing; 8) one keel-petal; 9) androecium; 10) fruiting calyx.
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Taxonomy
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Copyright Statement
Copyright The New York Botanical Garden Press
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Image Type