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(Last Modified On 5/30/2013)
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(Last Modified On 5/30/2013)
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Species
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Cryptostegia madagascariensis Bojer ex Dcne
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PlaceOfPublication
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DC., Prod. 8: 492. 1844.
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Note
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TYPE: Madagascar, Bojer (P?, not seen).
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Description
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Glabrous woody vines or climbing shrubs; stems with prominent lenticels on younger wood, copiously lactiferous. Leaves glabrous, ovate, apically acuminate, basally rounded to obtuse, finally tapering to the short petiole; the blades 4-10 cm long and 3-5 cm broad; petiole ca. 7 mm long, shiny on the upper surface, finely and prominently reticulate beneath. Inflorescence a loose terminal cyme, few- to several-flowered. Flowers with the calyx lobes broadly lanceolate, acuminate, the margins + chartaceous, 8-9 mm long and 4-6 mm wide; corolla pinkish to purplish, funnelform, the tube 1.5-2.5 cm long, puberulent outside, the lobes ovate, 2.4-3.0 cm long, reflexed at anthesis; gynostegium ca. 5 mm high,
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Habit
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woody vines or climbing shrubs
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Description
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the stamens not united but lightly coherent; corona corolline, the 5 distinct sub- ulate segments each 8-9 mm long, and attached to the corolla tube; pollen granular. Fruit woody, ca. 8 cm long and 2-3 cm wide, exocarp with a single dorsal and 2 lateral wings; seeds small, comose.
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Distribution
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Native to Madagascar, this species is widely used as an ornamental.
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Native
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Madagascar
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Note
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The copious latex is reported to cause varying degrees of skin irritation. Cryptostegia madagascariensis is, at least in the herbarium, often mistakenly identified as C. grandiflora R. Br. This latter taxon is probably grown in Panama, but no speci- mens have been seen. It is readily distinguished by its larger flowers and fruits, and by the corona segments which are bifurcately split into filiform lobes. Crypto- stegia grandiflora yields a reasonably high quantity of rubber from its latex, and it was formerly used commercially for that purpose hence its common name "India rubber vine."
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Common
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India rubber vine
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Specimen
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CANAL ZONE: Plant introduction garden at Summit, Steyermark 1935 (MO). Curundu, Tyson 50(48 (MO). HERRERA: 1 mi. E of Chitre near airport, D'Arcy & Croat 4188 (MO). PANAMA: Saboga Island, in village, Tyson 5599 (MO).
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