Dalea carnea var. gracilis (Nutt.) Barneby
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Authors
Rupert C. Barneby
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Authority
Barneby, Rupert C. 1977. Daleae Imagines, an illustrated revision of Errazurizia Philippi, Psorothamnus Rydberg, Marine Liebmann, and Dalea Lucanus emen. Barneby, including all species of Leguminosae tribe Amorpheae Borissova ever referred to Dalea. Mem. New York Bot. Gard. 27: 1-892.
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Family
Fabaceae
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Scientific Name
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Type
based on Petalostemon gracile (slender) Nutt., Jour. Acad. Philad. 7: 92. 1834. — "Hab. In the lower parts of Alabama and Florida." — Holotypus, PH (not seen, but verified by Wemple, 1970, p. 33); isotypi, GH, K, NY (herb. Torr.)! — Kuhniastera gracilis (
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Synonyms
Petalostemon bicolor Bertol., Petalostemon gracilis Nutt.
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Description
Species Description - Stems slender, flexuously diffuse or prostrate, 3-7 dm long, few-branched distally, often without axillary leafy spurs and thus appearing sparsely leafy, but spurs sometimes weakly developed and always present as primordia; primary leaves 2-3.5 cm long, with usually 7 leaflets up to 7-17 mm long, the odd one obviously longest; spikes shortly oblong to subglobose, 7-8 mm diam, 0.5-1.5 cm long; bracts 2-2.5 mm long; calyx 2.7-3.3 mm, its tube 2-2.5 mm, the teeth up to 0.6-0.9 (1) mm long; petals white; banner 3.8-4.5 mm, its blade 1.8-2.5 mm long, 1.4-2 mm wide; epistemonous petals ± 3 mm, the claw 1-1.7 mm, the blade 1.7-2.3 mm long, 0.7-1 mm wide; androecium 5-6 mm, the free filaments 2.7-3.3 mm long; 2n = 14 (Wemple, 1970, p. 12). — Collections: 12 (o).
Distribution and Ecology - Seasonally moist savannahs in the pine belt of the Gulf Coastal Plain, local, extending only a short way inland, s. Mississippi, s.-e. Alabama, and the Florida Panhandle, according to Wemple (1970, map 2, but not in text) extending to the n. shore of Lake Pontchartrain in extreme s.-e. Louisiana and up Flint River into the s.-w. corner of Georgia, w. in Florida into Wakulla County. — Flowering August-September.
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Discussion
(Plate LVII)
Easily recognized in its typical extreme form by the slender diffuse habit, suppression of most axillary short-shoots and resultant sparse foliage, and the short heads of small white flowers. These characters appear singly or in pairs in some populations of var. albida from as far east as Jacksonville, but not together outside the Florida Panhandle. Wemple points out that var. gracilis, because of its less complicated branching, has a shorter flowering season than other forms of D. carnea.
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Objects
Representative: Mississippi: Isely & Wemple 9110 (NY); Jacob 10 (OKLA). Alabama: Pennell 4450 (NY); Lloyd & Tracy 153 (NY). Florida: Biltmore Herb. 3040 (NY, US).
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Distribution
United States of America North America| Mississippi United States of America North America| Alabama United States of America North America| Florida United States of America North America| Georgia United States of America North America| Louisiana United States of America North America|