ovatis acuminatis, sepala subaequantibus, integris, pun- 
gentibus; floribus subsessilibus; sepalis oblongis, acutis, 
5.5 mm. longis; petalis albis, laminis lanceolatis, 8 mm. 
longis, apice valde inflexis. 
Dr. Smith writes: ‘‘Navia bicolor derives its specific 
name from the sharp contrast between the green gla- 
brous upper side of the leaf and the white felt-like cover- 
ing of the under side. This and the relatively great width 
of the leaf quickly distinguish it from all other known 
species of Navia.”’ 
Cotomspia: Vaupés, Cerro de Chiribiquete, a un lado del Rio Maca- 
ya. “‘Hierba de flores amarillas y bracteas blancas.’’ Enero 17, 1944, 
G. Gutierrez 653 (Tyrer in Gray Herb.); upper Apaporis Basin, Maca- 
ya River, Mount Chiribiquete, sandstone, xerophytie conditions, sa- 
vanna, alt. 1300-2100 ft. (390-630 m.), May 15-16, 1943, R. E. 
Schultes 5444 (Corypr in Gray Herb.). 
Navia graminifolia L. B. Smith sp. nov. 
Caulibus ramosis, densissime foliatis; foliis persisten- 
tibus; vaginis parvis, ovatis; laminis linearibus, acumi- 
natis, ca. 10 cm. longis, infra 8 mm. latis, nervatis, mox 
omnino glabris, margine subdense minuteque serrulatis ; 
scapo gracili, ad 15 mm. longo, glabro; inflorescentia 
dense capituliformi, 15-18 mm. diametro, glabra; brac- 
teis florigeris late ovato acuminatis, quam sepalis multo 
brevioribus; floribus subsessilibus; sepalis oblongis, acu- 
tis, 5 mm. longis; petalis flavis, laminis lanceolatis, 3 
mm. longis, apice valde inflexis. 
Dr. Smith writes: ‘‘Mavia graminifolia appears to be 
closely related to N. Schultesiana, but its longer and 
much more persistent leaves make the branches practi- 
cally indistinguishable and give the plant an entirely 
different habit.”’ 
Cotompia: Vaupés, upper Apaporis Basin, Macaya River, Mount 
Chiribiquete, sandstone, xerophytic conditions, savanna, alt. 1300- 
2100 ft. (390-630 m.), May 15-16, 1943, R. E. Schultes 5492 (Tyre 
in Gray Herb.). 
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