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Project Name Data (Last Modified On 9/25/2013)

Flora Data (Last Modified On 9/25/2013)
Contributor Michael 0. Dillon
PlaceOfPublication Prodr. 2: 243. 1825
Note TYPE: Chaetocalyx vincentina DC. = C. scandens (L.) Urb.
Synonym 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.
Description 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.
Habit vines
Distribution ranging from southern Mexico into the Antilles, through Central America, and in South America in Peru, northern Ar- gentina, southern Brazil and Uruguay.
Note 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.
Reference Rudd, V. E. 1958. A revision of the genus Chaetocalyx. Contr. U.S. Natl. Herb. 32(3): 207-245.
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