NO. I BROMELIACEAE OF BRAZIL — SMITH 75 



Tj. Flowers spreading, not imbricate at anthesis; floral bracts 

 coriaceous or subcoriaceous, 17 mm. long; rhachis alate- 



angled 24. T. monadelpha 



26. Floral bracts not more than 12 mm. long; inflorescence usually 

 compound; plant usually caulescent. 

 29. Leaf-scales subappressed ; leaf -blades stout, spirally twisted; 



inflorescence much branched 25. T. decomposita 



29. Leaf-scales spreading ; leaf-blades slender, usually twisted only 

 near their apices ; inflorescence few-branched or even simple. 



(Fig. 27.) 26. T. streptocarpa 



25. Scape naked or with i or 2 bracts which cover only a small part 

 of it; leaves in 2 ranks. 

 30. Petals bright yellow; floral bracts to 20 mm. long, about equal- 

 ing the sepals; leaf-blades 2-5 mm. in diameter, covered with 



narrow retrorse scales 27. T. crocata 



30. Petals blue or purple; floral bracts 9 mm. long, much shorter 

 than the sepals; leaf -blades 1-1.5 mm. in diameter, covered 

 with broad subappressed scales; sepals 12.5 mm. long (dis- 

 tinction from T. recurvata in fruit) 28. T. mallemontii 



24. Petal-blades narrow and inconspicuous; sepals 6-9 mm. long in the 

 Brazilian species; inflorescence almost always simple; small plants 

 with the appearance of coarse mosses. (Fig. 28.) 



Subgenus Diaphoranthema 

 31. Leaves in many ranks; scape evident, covered with bracts. 

 32. Spike lax with a geniculate axis, to 4 cm. long and i6-flowered ; 

 leaves 2-4 cm. long 29. T. loliacea 



32. Spike dense with a straight axis, not more than 17 mm. long, 



i-S-flowered; leaves i cm. long or rarely to 2 cm. 



30. T. tricholepis 

 31. Leaves in 2 ranks ; scape largely naked or else absent. 



33. Stem usually shorter than the leaves and always covered by them ; 



scape terminal, always evident; sepals not more than 9 mm. 

 long (distinction from T. mallemontii in fruit). 



31. T. recurvata 



33. Stem to 8 m. long, exposed between the leaves; scape almost 



none; flowers solitary on short pseudo-axillary branches. (Fig. 



28.) 32. T. usneoides 



2. Sepals asymmetric, nearly or quite free, broadest near the apex, not over 

 9 mm. long in the Brazilian species ; inflorescence laxly bipinnate in the 



Brazilian species Subgenus Pseudo-Catopsis 



34- Leaf-blades ligulate, rounded at the apex, usually with dark irregular 

 cross-bands ; floral bracts equaling the sepals ; spikes dense. 



33. T. triticea 

 34. Leaf-blades narrowly triangular, acuminate, concolorous; floral bracts 

 usually shorter than the sepals; spikes lax. 

 35. Flowers erect or ascending ; spikes erect ; scape decurved ; leaf-blades 



8 mm. wide. (Fig. 29.) 34. T. aeris-incola 



35- Flowers spreading; spikes spreading to reflexed; species of northern 

 Brazil. 



