1957] 



THE BOTANY OF THE GUAYANA HIGHLAND— PART II 



287 



25 cm longis, gracilibus, subdense quaquaverseque florigeris; bracteis florigeris 

 linearibus. obtusis, pedicellos subaequantibus vel paulo superantibus, tenuibus, 

 rubris; pedicellis patentibus, gracilibus, 3-5 mm longis; sepalis late ellipticis, 

 obtusis, 4 mm longis, integris, tenuibus, rubescentibus; petalis spathulatis, 

 obtusis, 12 mm longis, albis; staminibus verisimiliter petala subaequantibus sed 

 antheris ignotis, filamentis serie secundae cum petalis breviter connatis; ovario 

 fusiformi, stylo gracili, placentis interno loculorum angulo lineatim affixis; 

 seminibus caudatis. 



TYPE: cumbre at 2000 m alt., Cerro Paru, Rio Paru, Cano Asisa, Amazonas, 

 Venezuela, February 11, 1949, K. D. Phelps & C. B. Hitchcock 501. 



12. Lindmania thyrsoidea L. B. Smith, sp. nov. Fig. 17. 



Florifera 5-10 dm alta; foliis ad 32 cm longis, vaginis imperfecta cognitis, 

 verisimiliter suborbicularibus, ca. 4 cm diametro, stramineis, lucidis, dissite 

 obscureque lepidotis, laminis angustissime triangularibus, acuminatis, pungenti- 

 bus, 2 cm latis, supra glabris, subtus densissime adpresseque argenteo- lepidotis, 

 ad apicem versus integris, alibi spinis antrorsis vel retrorsis ad 2 mm longis laxe 

 armatis; scapo erecto, 6 mm diametro, sulcato, lepidibus minutis linearibus 

 albidis dense induto; scapi vaginis subfoliaceis, internodia multo superantibus 

 sed scapum paulo occultantibus, infimis obscure serrulatis; inflorescentia 

 bipinnata, anguste thyrsoidea, densa, 35 cm longa, 5 cm diametro, petalis 

 exceptis lepidibus patentibus minutis linearibus albidis dense induta; bracteis 

 primariis linearibus, ramos infimos superantibus; ramis divergentibus, 25 mm 

 longis, fere ad basin dense florigeris, haud secundifloris; bracteis florigeris 

 anguste triangularibus, quam pedicellis crassiusculis 3 mm longis multo brevio- 

 ribus; sepalis convolutis, reniformibus, 2.5 mm longis, late convexis, integris, 

 crasse coriaceis, laevibus, ex sicco stramineis, lucidis; petalis 7 mm longis, 

 quam staminibus brevioribus, lamina patente, orbiculari, convexa, indurata; 

 capsula crasse ovoidea, longe rostrata, castanea; seminibus fusiformibus, 

 reticulato-sculpturatis, nigris, breviter bicaudatis. 



TYPE: terrestrial, frequent on northwest ridge above Camp Yutaje at 1500 m 

 alt., Serrania Yutaje, Rio Manapiare, Amazonas, Venezuela, February 23,1953, 

 B. & C. K. Maguire 35385. 



Pitcairnia agavifolia L. B. Smith, sp. nov. Fig. 18. 



E fragmentis solum cognita sed verisimiliter maxima; folia 94 cm longa, 

 ensiformi, obscure lepidota, vagina parva, vix distincta, atro- castanea, serrulata, 

 lamina acuminata, 9 cm lata, plana, crassa, spinis subrectis atris ad 3 mm longis 

 subdense armata; scapo ignoto; inflorescentia forsan simplici, e fragmentis 

 parvis et vetustis cognita; axi tereti, laeve, 5 mm diametro; bracteis florigeris e 

 basibus solum cognitis sed sine dubio pedicellos superantibus; pedicellis vali- 

 diusculis, 6 mm longis; floribus valde recurvatis; sepalis ex sicco subtriangu- 

 laribus, ca. 25 mm longis, tenuibus, nervatis; petalis staminibusque ignotis; 

 ovario ca. % infero; capsula sepalis superata; seminibus alatis. 



TYPE: terrestrial on granite outcrop, vicinity of Intermediate Camp at 650 m 

 alt., Cerro Sipapo (Paraque), Amazonas, Venezuela, February 6, 1949, B. Maguire 

 & L. Politi 28788. 



The leaf of P itcairnia agavifolia is unique in the genus. All other species 

 with such a brOad leaf have very distinct petioles. The character of winged 

 seeds is rare in the genus but predominant in this region. The reflexed flowers 

 and semi-inferior ovary although not unique are still very rare in the genus. 



