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(Last Modified On 9/25/2013)
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(Last Modified On 9/25/2013)
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Genus
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CHAETOCALYX DC
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Contributor
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Michael 0. Dillon
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PlaceOfPublication
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Prodr. 2: 243. 1825
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Note
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TYPE: Chaetocalyx vincentina DC. = C. scandens (L.) Urb.
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Synonym
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Boenninghausia Spreng., Syst. Veg. 3: 245. 1826. TYPE: B. vincentina Spreng. = Chaetocalyx scandens (L.) Urb. Planarium Desv., Ann. Sci. Nat. (Paris) 9: 416. 1826. TYPE: P. latisiliquum (Poir.) Desv. = Chaetocalyx latisiliqua (Poir.) Benth. ex Hemsley. Rhadinocarpus Vog., Linnaea 12: 108. 1838. LECTOTYPE: R. brasiliensis Vog. = Chaetocalyx brasiliensis (Vog.) Benth. Isodesmia Gardner, London J. Bot. 2: 339. 1843. TYPE: I. tomentosa Gardner = Chaetocalyx tomentosa (Gardner) Rudd. Raimondianthus Harms, Notizbl. Bot. Gart. Berlin-Dahlem 10: 387. 1928. TYPE: R. platycarpus Harms = Chaetocalyx platycarpa (Harms) Rudd.
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Description
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Twining vines, herbaceous to suffrutescent; stems slender, 1-4 mm in diam- eter, subterete, striate, glabrous to densely pubescent. Leaves imparipinnate, 5- 7-foliolate, the rachis glabrous to pubescent, 2.0-12.5 cm long; leaflets oblong, elliptical, ovate or obovate, 1-8 cm long, 0.5-5.0 cm wide, entire, acute to obtuse or retuse, mucronulate, basally rounded, cuneate or subcordate, glabrous to pu- bescent, sometimes micropunctate, pinnately veined; petiolules pulvinate, 1-2 mm long; stipules paired, attached basally, linear to deltoid-ovate, acute to at- tenuate, entire to setose-ciliate or laciniate; exstipellate. Inflorescence terminal or axillary, racemes, panicles, fascicles, or rarely solitary; bracts stipuliform; ebracteolate. Flowers 5-merous, 12-30 mm long; calyx campanulate, 5-lobed, subequal, glabrous to densely pubescent with tubercular-based trichomes, or ab- sent, symmetrical to gibbous, basally articulate; corolla yellow or sometimes red to violet striate, the standard obovate to suborbicular, emarginate, the wings oblong, free, clawed, the keel nearly straight, clawed, free basally; stamens 10, filaments connate into a sheath, splitting above, or the vexillary stamen free, occasionally splitting below with maturity, the anthers dorsifixed, ellipsoidal, ca. 1 mm long; ovary sessile or stipitate, 6-16-ovulate, glabrous to densely pubescent, the style filiform, incurved, glabrous, the stigma capitate. Fruit a loment, 6-16- articulate, submoniliform, subterete to compressed, linear, reticulate to longitu- dinally striate, the articles oblong to quadrate; seeds elongate, 2.5-6.0 mm long, 1-2 mm wide, subcompressed, smooth, sublustrous, reddish brown, estrophio- late.
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Habit
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vines
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Distribution
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ranging from southern Mexico into the Antilles, through Central America, and in South America in Peru, northern Ar- gentina, southern Brazil and Uruguay.
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Note
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Most taxa occur in more or less mesic habitats up to 200 m. The genus is represented in Panama by only one species, Chaetocalyx latisiliqua.
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Reference
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Rudd, V. E. 1958. A revision of the genus Chaetocalyx. Contr. U.S. Natl. Herb. 32(3): 207-245.
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