Bauhinia chalkos R.S.Cowan
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Authority
Maguire, Bassett & Wurdack, John J. 1961. The botany of the Guayana Highland--part IV (2). Mem. New York Bot. Gard. 10: 1-87.
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Family
Caesalpiniaceae
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Scientific Name
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Description
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Latin Diagnosis - Frutex scandens 5 m altus, ramulis dense pilosulis, stipulis caducis, non visis. Petiolus 6-6.5 cm longus, dense pilosulus, lamina breviter bilobata, lobis 20-23 mm longis, triangularibus, obtusis ad subacutis, suborbicnlari ad oblatam, 13-13.5 cm longa, 14—16 cm lata, ad basim valde cordata, 11-nervia, nerviis leviter impressis supra, infra salientibus, venulis snbobscuris, faciebus superioribus glabris, inferioribus nitido-cupreis. Inflorescentiae racemosae, plerumque terminales, 11-21.5 cm longae, axe dense pilosulo, bracteis bracteolisque deciduis, 2.5-3 mm longis, oblanceolatis, acutis, pedicello 3-5 mm longo, dense pilosulo. Calyx cupreo-strigulosns, late campanulato-ovoideus, valde alato-costatus, tubo 4 mm longo, lobis 6.5 mm longis, 5.5 mm latis, ovato-oblongis, apice reflexo, suborbicnlari, ca. 2 mm diametro. Corolla gilva, cupreo-sericea extus, intus glabra, petalorum unguiculo ca. 7 mm longo, lamina orbiculari, 13-16 mm diametro, ad apicem rotundata. Filamenta parce villosa, ca. 11 mm longa; stylus glaber; ovarium dense cupreo-sericeum. Fructus ignotus.
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Discussion
Fig. 49
The coppery color of the under surfaces of the leaves in this new species is the basis for the specific epithet ([greek]: "of copper"). In this respect B. chedkos is quite similar to B. cupreonitens, to which it is surely rather closely related. The new species has much larger flowers; the reflexed tips of the calyx lobes are m u c h smaller; the leaves are larger, differently shaped, and with 2-4 fewer principal veins; and finally, the geographic range of the two species is disjunct.