306 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[Vol. 9, No. 3 



tissime triangularibus 5 18 cm longis, 15 mm latis, integris, margine dense albo 

 lanatis, supra glabris, subtus albo-flocculosis; inflorescentia nidulante, hemis- 

 phaerica, multiflora, 3 cm diametro, albo-flocculosa; bracteis exterioribus, sub- 

 foliaceis, flores multo superantibus; bracteis florigeris ellipticis, acutis, sepala 

 subaequantibus, integris, apice incrassatis; sepalis liberis, lanceolatis, acutis, 

 apice inflexis, 9 mm longis, tenuibus; ovario supero. 



TYPE: frequent on rocks on summit at 1800 m alt., Cerro Camani, Cano Gua- 

 viarito, Rio Manapiare, Rio Ventuari, Amazonas, Venezuela, February 12, 1951, 

 B. Maguire, K. D. Phelps, C B. Hitchcock & G. Budowski 31794. 



16. Navia pulvinata L. B. Smith, sp. nov. Fig. 40. 



Humilis, pulvinata; caule ramoso, foliis vetustis persistentibus dense ob- 

 tecto; foliis vivis plurimis, in apicibus caulis rosulatis, glabris, vaginis parvis, 

 late ovatis, pallide brunneis, subhyalinis, laminis patentibus, linearibus, acumi- 

 natis, 4 cm longis, basi vix 2 mm latis, minutissime laxeque serrulatis; inflores- 

 centia sessili, pauciflora, glabra; bracteis exterioribus e foliis gradatim reductis; 

 bracteis florigeris oblongis, acutis, quam sepalis brevioribus, integris, tenuibus; 

 pedicellis brevibus; sepalis liberis, linearibus, acutis, 14 mm longis, posteriori- 

 bus carinatis; petalis aureis; staminibus inclusis; ovario supero. 



TYPE: flowers yellow, bracts orange, pulvinate on dry exposed rock, near sum- 

 mit of Cerro Culebra at 1600 m alt., Cerro Duida, Amazonas, Venezuela, April 

 24, 1949, B. Maguire & B. Maguire, Jr. 29111. 



The same species is represented by Maguire, Cowan, & Wurdack 29609, flowers or- 

 ange-red, densely pulvinate on vertical cliffs, frequent, North Escarpment, at 1200 m alt., 

 Cerro Duida. 



17. Navia saxicola L. B. Smith, sp. nov. Fig. 41. 



Humilis, verisimiliter pulvinata; parte brevi caulis solum cognita, foliis ve- 

 tustis dense obtecta; foliis vivis plurimis, apice caulis rosulatis, juvenilibus 

 pilis albis minutis dissite obtectis, mox glabris, vaginis parvis, suborbicularibus, 

 basi hyalinis, apice atro-castaneis, laminis patentibus, linearibus, acuminatis, 

 8 cm longis, 3 mm latis, basi dense minuteque serrulatis, alibi laxius; scapo 

 brevi, nudo; inflorescentia e centro foliorum parum exserta; bracteis exterioribus 

 foliaceis sed valde reductis; bracteis florigeris ovatis, sepala superantibus, basi 

 hyalinis, apice brunneis incrassatis et obscurissime serrulatis; pedicellis brevi- 

 bus; sepalis liberis, oblongis, acutis, 6 mm longis, posterioribus, alato-cari- 

 natis, carina denticulata; petalis albis, stamina subaequantibus; antheris apice 

 dehiscentibus; ovario supero. 



7YPE: flowers white, base of center (young) leaves white, frequent on rocks, 

 cumbre at 1200 m alt., Cerro Yapacana, Rio Orinoco, Amazonas, Venezuela, Jan- 

 uary 3, 1951, B. Maguire, R. S. Cowan & /. /. Wurdack 30680. 



18. Navia pauciflora L, B. Smith, sp. nov. Fig. 42. 



Humilis, forsan pulvinata; foliis ad 11 cm longis, vaginis parvis, quam laminis 



Explanation of figures 42-47 



FIGS. 42-47. Navia, FIG. 42. N. pauciflora (Maguire & Maguire 29154). a, habit, X 

 b, margin of leaf, X 5; c, posterior sepal, x 5. FIG. 43. N. octopoides (Maguire & Maguire 

 29151). a, apex of leaf , X 1; b, margin of leaf, x 5; c, floral bract, x 1; d, posterior se- 

 pals, X 1. FIG. 44. /V. latifolia (Maguire, Cowan & Wurdack 29642). a, apex of leaf, x 1; 

 b, margin of leaf, X 5; c, floral bract, X 1; d, posterior sepals, X 5. FIG. 45. N. cretacea 

 (Maguire, Cowan & Wurdack 29682). a, apex of leaf, X 1; b, margin of leaf, X 5; c, poste- 

 rior sepals, X 5. FIG. 46. N. cucullata (Maguire 32766). a, leaf, x 1; b, inflorescence, X 

 1; c, floral bract, x 2; d, posterior sepal, X 2; e, anterior sepal, x 2. FIG. 47. N. umbra- 

 tilis (Maguire & Maguire 35406). a, leaf, X 1; b, floral bract, x 2; c, sepals, X 2; d, fruit, 

 X 2. 



