y6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I26 



36. Scape-bracts much shorter than the internodes; primary bracts 



very short; leaf -blades 6 mm. wide 35. T. jenmanii 



36. Scape-bracts about equaling the internodes; primary bracts about 

 half as long as the spikes ; leaf-blades to 20 mm. wide. 



36. T. caribaea 

 I. Stamens longer than the petals, exserted; leaf -blades narrowly triangular 



or linear in the Brazilian species Subgenus Tillandsia 



Z7. Leaf-sheaths nearly flat, their apices widely separated from the scape; 

 floral bracts coriaceous or subcoriaceous. 

 38. Leaf-blades narrowly triangular, 10-30 mm. wide at the base; leaf- 

 sheaths broad; floral bracts nearly or quite glabrous. 

 39. Spikes not more than 12 mm. wide; leaf -sheaths the same color as 

 the blades except for their extreme bases which are pale-ferrugi- 

 nous ; inflorescence usually compound 37. T. polystachia 



39. Spikes to 4 cm. wide ; leaf-sheaths dark castaneous at least toward 

 the base. 

 40. Floral bracts pale, coriaceous, even or slightly nerved; sepals 

 lanceolate, acute, connate posteriorly; inflorescence often com- 

 pound 38. T. f asciculata 



40. Floral bracts blackening when dry, probably fleshy in life; sepals 



elliptic, obtuse, free ; inflorescence simple 39. T. kegeliana 



38. Leaf-blades linear-subulate, very narrow; leaf-sheaths narrow; floral 

 bracts densely lepidote at least when young; sepals connate poste- 

 riorly. 

 41. Inflorescence usually shorter than the leaves, when simple its flowers 

 in 2 ranks, when compound lax at least toward the base. 



40. T. tenuifolia 



41. Inflorescence usually equaling or exceeding the leaves, when simple 



its flowers in more than 2 ranks, when compound very dense with 



its bracts massed below it 41. T. juncea 



zy. Leaf-sheaths inflated and forming a pseudo-bulb, their apices enclosing 

 the scape or the base of the inflorescence; floral bracts subcoriaceous 

 to subchartaceous. 

 42. Upper scape-bracts merely apiculate; leaf -blades only curved; sepals 



free, ecarinate ; petals red. (Fig. 30.) 42. T. paraensis 



42. Upper scape-bracts, or lacking an evident scape the lowest primary 

 bracts, with long f oliaceous blades ; leaf -blades contorted ; sepals 

 more or less connate posteriorly; petals blue or purple. 

 43. Leaves covered with minute appressed scales; scape short but evi- 

 dent; inflorescence simple or digitate; spikes lanceolate; floral 



bracts 10-15 mm. long 43. T. bulbosa 



43. Leaves covered with coarse spreading scales ; scape not evident ; 

 inflorescence usually simple; spikes broad; floral bracts 20-26 mm. 

 long 44. T. pruinosa 



Subgenus Allardtia (A. Dietr.) Baker 

 I. Tillandsia duidae L. B. Smith, Bull. Torrey Bot. Club 58:340, pi. 26, 



fig- 3 (t-4). 1931. 



Brazil : Probable, but not yet recorded. 



Venezuela: Mount Roraima, Steycrmark 58998 (F, GH). 



