198 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I26 



SO. Petals colored; sepals 4 mm. long. 

 SI. Inflorescence longer than broad; petal-blades 



wholly blue 10. Ae. miniata 



SI. Inflorescence about as broad as long; petal- 

 blades blue only at the apex. 



II. Ae. conglomerata 



SUBKEY B 



I. Leaf -blades narrowly triangular, acuminate, 4-30 mm. wide; scape not ex- 

 ceeding the leaf -sheaths ; sepals to 17 mm. long. 

 2. Sepals broad, strongly asymmetric, rounded and mucronate ; leaf-spines 

 ascending S8. Ae. recurvata 



2. Sepals narrowly lance-triangular, acuminate; leaf-spines recurved. 



59. Ae. pitcairnioides 

 I. Leaf-blades ligulate, acuminate to broadly rounded and apiculate, 60-150 mm. 

 wide; scape various. 



3. Sepals 25-30 mm. long, narrow, subsymmetric ; leaf -blades acuminate, 



channeled toward the base; species of the Amazon Basin. 

 4. Leaves and bracts sparsely pale-lepidote to glabrous on the under side. 



81. Ae. fernandae 



4. Leaves densely ferruginous-lepidote on the under side. 



82. Ae. rubiginosa 

 3. Sepals 17-20 mm. long, often strongly asymmetric; leaf-blades acute to 

 rounded and apiculate, not channeled; species of eastern Brazil. 



5. Scape-bracts laxly if at all imbricate, small, colored ; leaf-blades bearing 



broad white cross-bands 57. Ae. f asciata 



5. Scape-bracts densely imbricate, more or less foliaceous; leaf-blades 

 concolorous. 

 6. Inflorescence globose to cylindric; scape elongate. 

 7. Bases of the leaves and scape-bracts green, scarcely different from 

 the blades. (Fig. 102.) 61. Ae. pectinata 



7. Bases of the leaves and scape-bracts dark castaneous to nearly 



black. (Fig. 109.) 83. Ae. multiflora 



6. Inflorescence depressed-globose; scape very short. 



8. Scape-bracts and floral bracts red, drying to dark castaneous ; floral 



bracts coarsely serrate, flat toward the base 84. Ae. depressa 



8. Scape-bracts and floral bracts always green; floral bracts serrulate, 

 their bases enfolding the flowers 85. Ae. saxicola 



SUBKEY c 



I. Flowers mostly in two ranks ; leaves subpetiolate ; floral bracts shorter than 

 the ovary at anthesis ; sepals apiculate, 5-8 mm. long. . . 54. Ae. contracta 

 I. Flowers mostly in more than two ranks. 

 2. Sepals obtuse or acute with a soft apex, never mucronate nor pungent. 

 3. Inflorescence lax, its axis plainly visible. 

 4. Flowers slenderly pedicellate ; inflorescence usually pendulous ; sepals 



9 mm. long ; ovary verrucose 12. Ae. racinae 



4. Flowers sessile. 



S. Ovary strongly alate ; scape-bracts entire ; sepals 8 mm. long ; floral 

 bracts large (2. Ae. brachycaulis) 



