312 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [Vol. 9, No. 3 



TYPE: frequent, hanging on wet cliffs, lower North Escarpment at 1300 m alt., 

 Cerro Sipapo (Paraque), Amazonas, Venezuela, Dec. l-3 9 1948, B. Maguire & L. 

 Politi 27500. 



The species is also represented by number 27866 from the same locality at 1400 m 



alt. 



28. Navia sandwithii L. B. Smith, sp. nov. Fig. 52. 



Caulescens; caule ad 28 cm longo, 4 mm diametro, foliis fere omnino occulto; 

 foliis ad 14 cm longis, vaginis late ovatis, 1 cm longis, brunneis, glabris, lami- 

 nis lineari-lanceolatis, acuminatis, basi attenuatis, 14-17 mm latis, anguste 

 brunneo-marginatis, dense serrulatis, basi lepidoto-ciliatis, alibi glabris, pallide 

 viridibus, ex sicco linea mediana albida pictis; inflorescentiis nidulantibus, ter- 

 minalibus dein pseudolateralibus, simplicibus, paucifloris, 15 mm diametro; brac- 

 teis exterioribus foliaceis sed valde reductis; bracteis florigeris ovatis, obtusis 

 apiculatisque, integris, tenuibus, glabris; sepalis oblongis, obtusis, 10-13 mm 

 longis, alte connatis, posterioribus anguste alato-carinatis; petalis acutis. vix 

 unguiculatis, 18 mm longis, albis, staminibus subaequantibus sed reflexis; ovario 

 supero; capsula ellipsoidea, 5 mm longa; seminibus nudis, atris, verrucoso-sul- 

 catis. 



TYPE: on cliff face at the top of precipices and under boulders on precipices 

 at 360 m alt., Kaieteur Falls, British Guiana, September 1-8, 1937, N. Y. Sand- 

 with 1285, Kew. 



BRITISH GUIANA: Dry rock shelf, 1 mile below Kaieteur Falls, Potaro River Gorge, 

 May 13, 1944, B. Maguire & D. B. Fanshawe 23435* 



29. Navia subpetiolata L. B. Smith, sp. nov. Fig. 53- 



Caulescens; foliis subpetiolatis, ad 26 cm longis, apice obscure serrulato ex- 

 cepto integris, juvenilibus obscurissime dissiteque lepidotis. mox glabris, vagi- 

 nis triangularibus, 3-4 cm longis, ex sicco rubentibus, laminis lineari-lanceola- 

 tis, acuminatis, 14 mm latis, marginibus paulo incrassatis; inflorescentia in 

 centro foliorum sessili, ellipsoidea, 30 mm longa, 15 mm diametro, verisimiliter 

 simplici; bracteis ellipticis, obtusis, ca. 2 cm longis, sepala superantibus, inte- 

 gris, laevibus, rubris; sepalis oblongis, obtusis, 16 mm longis, tenuibus, basi 

 4-5 mm connatis; staminibus inclusis; ovario supero. 



TYPE: leaves basally white with extreme bases green, frequent in cumbre at 

 2000 m alt., Serrania Paru, Rib Paru, Caho Asi'sa, Rib Ventuari, Amazonas, Ven- 

 ezuela, February 10, 1951, R. S. Cowan & J. }. V/urdack 31368. 



30. Navia caricifolia L. B. Smith, sp. nov. Fig. 54. 



Cflulescens; caule erecto, simplici, 10-19 cm alto, foliorum vaginis vetustis 

 inclusis 1 cm diametro; foliis juvenilibus terminalibus, strictis, ad 22 mm longis, 

 glabris, vaginis ovatis, 2 cm longis, nervatis, brunneis, laminis linearibus, acu- 

 minatis, ad 19 cm longis, 3 mm latis, basi obscure serrulatis, involutis, basi al- 

 bis sed haud angustatis; inflorescentiis terminalibus et pseudolateralibus, sessi- 

 libus, simplicibus, anguste ellipsoideis, 23 mm longis, glabris; bracteis florige- 



Explanation of figures 53-57 



FIGS. 53-57. Navia, FIG. .53. N. subpetiolata (Cowan & Wurdaok 31368). a, leaf, X %; 

 b, inflorescence, x %; c, flower, x 1. FIG. 54. N. caricifolia (Maguire & Maguire 35437). 

 a, habit, x %\ b, base of leaf, x 1; c, inflorescence, X 1; d, floral bract, x 2; e, posterior 

 sepals, x 2. FIG. 55. N. immersa (Maguire, Cowan & Wurdack 30325). a, base of leaf, X 

 1; b, part of leaf-blade, x 5; c, posterior sepal, x 1; d, pistil, x 1. FIG. 56. N. aloifolia 

 (Maguire, Wurdack & Bunting 37146). a, habit, X b, leaf, X 1; c, old flower, x 2. FIG. 

 57. N. parvula (Maguire, Wurdack & Bunting 37326). a, habit, x 1; b, leaf, X 1; c, fruit, X 

 2; d, seed, x 10. 



