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(Last Modified On 5/22/2013)
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(Last Modified On 5/22/2013)
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Species
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Pyrostegia venusta (Ker.) Miers
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PlaceOfPublication
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Proc. Roy. Hort. Soc. 3: 188. 1863.
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Synonym
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Bignonia venusta Ker., Bot. Reg. 3: 5. 249. 1818. TYPE: (not seen). Bignonia ignea Vell., Fl. Flum. 244. 1825; 6: Tab. 15. 1827. TYPE: (not seen). Pyrostegia ignea (Vell.) K. B. Presl, Bot. Bemerk. 93. 1843. Pyrostegia acuminata Miers, Proc. Roy. Hort. Soc. 3: 188. 1863, nomen nudum. Pyrostegia intaminata Miers, Proc. Roy. Hort. Soc. 3: 188. 1863, nomen nudum. Pyrostegia pallida Miers, Proc. Roy. Hort. Soc. 3: 188. 1863, nomen nudum. Pyrostegia parvifolia Miers, Proc. Roy. Hort. Soc. 3: 188. 1863, nomen nudum. Pyrostegia reticulata Miers, Proc. Roy. Hort. Soc. 3: 188. 1863, nomen nudum. Bignonia tecomaeflora Rusby, Mem. Torrey Bot. Club 6: 101. 1896. SYNTYPES: Bolivia, Bang 1596 (K, GH, M, MO), Bang 1510 (GH, MO, NY, US).
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Description
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Liana; branchlets somewhat angled, puberulous, without interpetiolar glan- dular fields; pseudostipules inconspicuous or oblanceolate and subfoliaceous. Leaves 2-foliolate, sometimes with a terminal tendril; leaflets ovate, acute, basally rounded, 4-6 cm long and 2.5-4 cm wide, chartaceous, lepidote to more or less puberulous; tendril shortly trifid; petiolules 1-1.5 cm long, petiole 1.5- 2.5 cm long. Inflorescence a terminal panicle. Flowers with the calyx cupular, subtruncate to 5 denticulate, scattered lepidote, the margin densely ciliate; corolla red-orange, tubular, the lobes narrow, valvate in bud, 5.5-6.5 cm long and 0.9-1.1 cm wide at the mouth, the tube 4.0-5.0 cm long, the lobes 1.0-1.5 cm long, the tube glabrous outside, the lobes conspicuously puberulous on margins and to some extent within, the tube pubescent inside at and below the level of stamen insertion; stamens exserted, the anther thecae not or very slightly divergent, ca. 4 mm long, the filaments 3.5-4.0 cm long, the staminode 3-4 mm long and inserted ca. 3 cm from base of tube, the filaments inserted 2.2-2.4 cm from base of tube; pistil 4.8-5.1 cm long, the ovary linear, lepidote, 4 mm long and 1 mm wide, the ovules 2-seriate in each locule but staggered so apparently 1-seriate in most cross sections; disc cupular-pulvinate. Capsule linear, acute at both ends, 25-30 cm long and 1.4-1.6 cm wide, the midrib slightly raised; seeds thin, bialate, 1.2-1.4 cm long and 4-4.5 cm wide, the wings brown with a hyaline tip.
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Habit
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Liana
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Note
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No collections have been seen from Panama, and the above description is taken from South American material. The species is widely cultivated in the neotropics, especially at middle elevations. I have seen it in Costa Rica, and it undoubtedly is cultivated in Chiriqui Province as well. It is native at least to Brazil, Paraguay, and Bolivia, but its natural range is obscured by extensive cultivation and sometimes naturalization. The conspicuous orange-red flowers with narrow corollas and exserted anthers are distinctive.
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Distribution
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South American
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