decayed leaf-bases; living leaves many in a spreading 
rosette at the apex of the stem, the sheaths completely 
covered, the blades linear, acute, pungent, 25 cm. long, 
17 mm. wide, flat, densely serrulate, glabrous; scape 
very short; inflorescence very densely paniculate, glo- 
bose, 25 mm. in diameter; primary bracts lance-triangu- 
lar, pungent, serrate, shorter than the globose short- 
stipitate spikes; floral bracts ovate, acute, slightly but 
consistently shorter than the sepals, ferruginous-floccu- 
lose at base; pedicels short and inconspicuous; sepals 
lance-oblong, acute, 6 mm. long, the posterior ones 
sharply carinate and connate for 2 mm.; petals white 
(! Schultes), the blades spreading, narrowly elliptic. 
In habit, Navia heliophila closely resembles N. angus- 
tifolia (Bak.) Mez of Guiana and WN. wyridifiora L. B. 
Smith of Venezuela, but it differs from the former in its 
much smaller flowers and from the latter in its sharply 
acute sepals. 
CotomsiA: Comisaria del Amazonas, Rio Apaporis, Raudal de Jiri- 
jirimo. “On exposed ledge in savannah and caatinga.’’ March 1951, 
Richard Evans Schultes 12085 (Tyrer in U.S. Nat. Herb. No. 2048050). 
—Same locality. November 25-26, 1951, H. Garcia- Barriga 13712, 
138736. 
Navia Lopezii L. B. Smith ex Schultes in Bot. Mus. 
Leafl. Harvard Univ. 15 (1951) 40. 
It is now possible to publish the plate (XX VIII) pre- 
pared to illustrate this species. 
Navia Lopezii L. B. Smith ex Schultes var. colom- 
biana L. B. Smith var. nov. 
A Navia Lopez inflorescentiae bracteis exterioribus 
quam sepalis brevioribus, petalis albis differt. 
Cotoms1a: Comisaria del Vaupés, Rio Kananari, Cerro Isibukuri. 
Alt. 250-700 m. “*On cliff in shade. Bracts of flowers purple outside, 
pinkish or yellowish inside. Flowers white, Leaves almost membra- 
naceous.’’ August 4, 1951, Richard Evans Schultes & Isidoro Cabrera 
13342 (Tyee in U.S. Nat. Herb. No. 2120933). 
[ 195 ] 
