Daleae Imagines page 823 plate CXV
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Title
Daleae Imagines page 823 plate CXV
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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 CXV Dalea lutea (Cav.) Willd., a polymorphic species dispersed over much of continental Mexico, from n. Coahuila and centr. Chihuahua s. to Guerrero, and e. through Chiapas into the highlands of Guatemala. It is the only dalea in which livid, persistent bracts are combined with flowers that open pale greenish-yellow to light golden- yellow and (nearly always) turn brown or black in fading. The dried foliage is commonly nigrescent also. The var. lutea, of Mexico n. of the Neovolcanic Belt, is herbaceous or bushily suffruticose, rarely over a meter tall, and relatively large-flowered; stems, leaves, and calyx-tubes vary from glabrous to densely gray-pilosulous. A rare var. arsenei, with similar flower but leaflets (glabrate) up to 15 pairs in the main cauline leaves, has been collected in Michoacan and Guerrero (not illustrated). The var. gigantea, a shrub attaining a stature of 4 m, is found within the Neovolcanic Belt in Michoacan and s.-w. Mexico, and disjunctly in Chiapas and Guatemala. Its foliage and stems are characteristically pilosulous, the flowers are small, and the petals turn truly black when old. — Inflorescences × 1; the rest × 5. var. lutea: 1) flowering branchlet; 2) flower + bract; 3, 4, & 5) leaflets (dorsal view) with the corresponding calyx, showing part of the variation in pubescence, leaflet-shape, and length of calyx-teeth; 6) banner, ventral and profile views; 7) androecium. var. gigantea: 8) flowering branchlet; 9) stipules; 10) leaflet, dorsal view; 11) flower + bract; 12) banner, ventral view; 13) wing; 14) keel; 15) pod.
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Taxonomy
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Image Type