Little is known of the chemistry of the Marcgraviaceae. 
Tannins and leucoanthocyanins have been reported from some 
species of Marcgravia (Gibbs: loc. cit. 3 (1974) 1371). 
Souroubea guianensis Aub/er var. cylindrica Wittmack in 
Martius, Fl. Bras. 12, pt. 1 (1878) 253. 
CoLomBiIA: Comisaria del Vaupés, Rio Vaupés, Circasia. Sandy savannah, 
quartzite base. Alt. about 800 feet. “Fruit brown.” April 20, 1953. R. E. Schultes 
et I. Cabrera 19214. — Same locality. “Flowers orange-red.” November 1953. R. 
E. Schultes et I. Cabrera 19697. 
The Karijona Indians residing in the upper Rio Vaupés value a 
tea of the leaves of this plant as a tranquilizing medicine. 
Souroubea pachyphylla Gi/g in Engler, Bot. Jahrb. 25 Beibl. 60 
(1898) 33. 
CotomsiA: Comisaria del Amazonas, Rio Amazonas, Leticia. January 
28—February 7, 1969. 7. Plowman, T. Lockwood, H. Kennedy et R. E. Schultes 
2318: 
From the dried leaves, the Witoto Indians living near Leticia 
(who originally came from the Rio Igaraparana) prepare a 
pomade with animal fat for application to the eyes in cases of 
extreme infection from conjunctivitis. 
GUTTIFERAE 
Caraipa parvielliptica Cuatrecasas in Rev. Acad. Col. Cienc. 8, 
No. 29 (1950) 64. 
CoLomsiA: Comisaria del Vaupés, Rio Kananari, Cerro Isibukuri. “Bush 
along rill.” April 12, 1951. R. E. Schultes et 1. Cabrera 14738. Comisaria del 
Amazonas, Rio Apaporis, Soratama. “Height 60 feet.” March 26, 1952. R. E. 
Schultes et I. Cabrera 16070. — Rio Miritiparana. “Small tree. Yukuna: see - 
na.” May 8, 1952. R. E. Schultes et I. Cabrera 16460. 
The Yukunas apply the sap of Caraipa parvielliptica to sores of 
the mucous membrane of the mouth. In Brazil, the sap of C. 
paraensis Huber and C. grandifolia Martius is similarly 
employed for herpes, mange and itches (Le Cointe: A Amazonia 
Brasileira 3 (1934) 424). 
Several species of Caraipa have been reported to containa high 
content of resins which are useful in treating a variety of skin 
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