CoLomsiA: Comisaria del Vaupés, Rio Kuduyari (tributary of Rio 
Vaupés), Yapoboddé. Quartzite savannah near headwaters. Alt. about 
900-1000 feet. General location: Lat. 1°20/ N, Long. 70°30! W. 
‘‘From 4 to 6 feet tall. Flowers white.’” October 4-5, 1951, Richard 
Evans Schultes & Isidoro Cabrera 14351 (Tyrer in Herb. Gray ).—Comis- 
aria del Vaupés, Rio Kuduyari (tributary of Rio Vaupés), Yapoboda, 
quartzite savannah near headwaters. Alt. about 900-1000 ft. General 
location: Lat. 1°20’ N, Long. 70°30’ W. ‘‘Up to 6 feet tall. Flowers 
yellow-white.’’? October 5-6, 1951, Richard Evans Schultes & Isidoro 
Cabrera 14265.—Comisaria del Vaupés, Rio Kubiyt (tributary of Rio 
Vaupés), Cerro Kafiendd, savannahs about 15 miles upstream from 
mouth. Quartzite base. Alt. about 800-900 feet. General location: 
Lat. 1°0/ N, Long. 70°15’ W. November 10, 1952, Richard Evans 
Schultes & Istdoro Cabrera 18385,—Comisaria del Vaupés, Rio Kubiyt 
(tributary of Rio Vaupés), Cerro Kafiendaé, savannahs about 15 miles 
upstream from mouth. Quartzite base. Altitude about 800-900 feet. 
General location: Lat. 1°0’ N, Long. 70°15’ W. ‘“‘Four feet tall. 
Flowers yellow-white.’? May 5, 1958, Richard Evans Schultes & Isidoro 
Cabrera 19239.—Comisaria del Vaupés, Rio Kuduyari (tributary of Rio 
Vaupés) Yapoboda. Quartzite savannah near headwaters. Alt. about 
900-1,000 feet. ‘“Four feet tall. Common in swales.’’ April 1953, 
Richard Evans Schultes &§ Isidoro Cabrera 19975.—Comisaria del Vaupés, 
Rio Kubiya, Cerro Kafianddé. Alt. mis o menos 380 m. ‘‘Dos metros 
alto, erecto; flores blancas.’’ November 2-4, 1952, Hernando Garcia- 
Barriga 15088. 
run - _ 7 
THURNIACEAE 
Thurnia sphaerocephala (Rudge) Hooker filius in 
Hooker Icon. Pl. (18838) t. 1407. 
The collections Schultes & Cabrera 17568 and 19858 
establish for the first time the occurrence in Colombia of 
the monogeneric family Thurniaceae, allied to the Jun- 
caceae and the Rapateaceae. 
The genus Thurnia comprises two species. Thurnia 
Jenmant occurs in British Guiana, where the type was 
found ‘“‘thickly choking the Potaro river above and_ be- 
low the Kaieteur falls.*” The range of Thurnia sphaero- 
cephala is greater, including British Guiana and in scat- 
tered localities in the Brazilian Amazonia south to the 
Xingu and west to the Solimdes. The range extension 
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