1957] 



THE BOTANY OF THE GUAYANA HIGHLAND — PART II 



301 



dense armatis. axillis spinarum albo-barbellatis; scapo brevi, nudo; inflores- 

 centia densissime hemisphaerica, 3-4 cm diametro; bracteis exterioribus ex ovato 

 acuminatis, subfoliaceis = flores aequantibus vel superantibus; bracteis florigeris 

 ovatis, acutis. sepala paulo superantibus. pectinatoserratis, rubris. lepidibus 

 pallidis adpressis vestitis, apice recurvatis; sepalis liberis, lanceolatis. acumi- 

 natis. 14 mm longis- nervatis- rubris, albo-lepidotis, posterioribus alato-carinatis; 

 petalis albis; staminibus inclusis; ovario supero. 



TYPE: leaves glaucous above and below, bracts pink, flowers white, stamens 

 yellow, infrequent along west rim of cumbre at 2000 m alt., Serrania Paru, Rio 

 Parti, Cano Asisa, Ri'o Ventuari. Amazonas, Venezuela. February 7, 1951, R. S. 

 Cowan & J. J. Wurdack 31357. 



S. Navia trichodonta L. B. Smith, sp. nov. Fig. 32. 



Caulescens; foliis 8-13 cm longis, pilis albis minutis vestitis, vaginis brevi- 

 bus, late ovatis, brunneis. laminis linearibus, acuminatis, 6 mm latis, spinis pal- 

 lidis 0.7 mm longis laxe armatis, axillis spinarum albo-barbellatis; scapo 1 cm. 

 longo, foliis omnino occulto; inflorescentia densissime hemisphaerica, 3-4 cm 

 diametro, bipinnata, albo-pilosa; bracteis exterioribus foliis similibus sed valde 

 reductis; bracteis florigeris ovatis. acutis, sepala superantibus, serrulatis, ru- 

 bris; floribus breviter pedicellatis; sepalis liberis. lanceolatis, rectis, acumina- 

 tis, 15 mm longis, nervatis, rubris, posterioribus anguste alato-carinatis; petalis 

 albis; staminibus inclusis; ovario supero. 



TYPE: bracts pink, flowers white, frequent in dry places under overhanging 

 cliffs near summit of South Escarpment, Cerro Huachamacari. Rio Cunucunurrfa, 

 Amazonas, Venezuela, Dec. 14, 1950, S\aguire, Cowan & Wurdack 30228. 



This species is also represented by number 29798 from the same locality at 

 1300 m alt. 



9. Navia viridis L. B. Smith, sp. nov. Fig. 33. 



Verisimiliter humilis; caule ignoto; foliis 5 dm longis, vaginis late ovatis. 

 brevibus. brunneis, glabris. laminis linearibus. caudato-acuminatis, 10 mm latis, 

 spinis patentibus pallidis ad 1 mm longis laxe armatis, supra glabris, subtus pilis 

 albis minutis dissite vestitis, linea mediana lata pallida pictis; inflorescentia 

 sessili. subglobosa, 25 mm diametro. e spicis brevissimis digitatim bipinnata. 

 glabra; bracteis exterioribus foliaceis sed valde reductis; bracteis florigeris late 

 ovatis, acuminatis et apice incrassatis. sepala superantibus sed apice reflexis, 

 serrulatis, nervatis. viridibus; pedicellis brevibus. latis; sepalis liberis, cochle- 

 ari-irnbricatis, lanceolatis, acutis, 8 mm longis, valde nervatis, viridibus, poste- 

 rioribus late alato-carinatis; petalis albis, imperfecte cognitis; ovario supero. 



TYPE: terrestrial, flowers white, leaves pellucid green, frequent along Cano 

 Culebra at 1400 m alt., Cerro Duida, Amazonas, Venezuela, April 24, 1949, 

 S\aguire & B. Waguire, Jr. 29078. 



10. Navia phelpsiae L. B. Smith, sp. nov. Fig. 34. 



Verisimiliter humilis; caule ignoto; foliis multis, 3 dm longis, supra glabris, 

 subtus lepidibus linearibus sparse inconspicueque vestitis, vaginis inconspicuis 

 quam laminis paulo latioribus, laminis linearibus, caudato-acuminatis, 15 mm la- 

 tis, linea mediana lata pictis, spinis patentibus pallidis ad 1.5 mm longis laxe 

 armatis, axillis .spinarum infimarum barbellatis; inflorescentia sessili, hemisphaer- 

 ica, 4-5 cm diametro, e spicis brevissimis digitatim bipinnata, mox glabra; brac- 

 teis rubris, dense serrulatis, exterioribus subfoliaceis sed valde reductis, brac- 

 teis florigeris lanceolatis vel ovatis, acuminatis, rectis, sepala superantibus, 

 dense serrulatis, subcoriaceis; pedicellis brevissimis; sepalis liberis, lanceola- 



