NO. I BROMELIACEAE OF BRAZIL — SMITH I45 



II. Inflorescence many-flowered, hemispherical. 

 13. Leaves strongly serrulate; sepals 21-28 mm. long, connate for 



about one-fourth of their length, obtuse 11. N. carolinae 



13. Leaves subentire ; sepals 19 mm. long, connate for more than 



half their length, acute 12. N. compacta 



4. Inner leaves like the outer, green or purplish. 



14. Sepals 13-18 mm. long ; flowers about 30 mm. long or less ; plants small. 

 15. Leaves entire or subentire, to 35 mm. wide; sepals obtuse, 15-18 mm. 



long. (Fig. 55.) 13. N. laevis 



15. Leaves distinctly serrulate, narrower. 

 16. The leaves rarely over 15 cm. long, forming a cylindric or ellipsoid 

 tank constricted at the apex. 

 17. Sepals acute or acuminate, subsymmetric, 15 mm. long; petal- 

 blades with broad dark blue margins 14. N. ampullacea 



17. Sepals obtuse, strongly asymmetric, 12 mm. long; petal-blades 



wholly white. (Fig. 56.) 15. N. hoehneana 



16. The leaves larger; tank more infundibuliform. 



18. Leaves densely appressed-lepidote on both sides ; pedicels 13- 



14 mm. long; sepals 14-15 mm. long. 

 19. Sepals nearly free, strongly asymmetric, the apex extending 

 3 mm. above the wings; leaves 22 cm. long. (Fig. 57.) 



16. N. leprosa 



19. Sepals connate for 3 mm., subsymmetric, apiculate; leaves 



36 cm. long. (Fig. 58.) 17. N. fiuminensis 



18. Leaves minutely lepidote beneath or glabrous. 



20. Pedicels 20 mm. long; sepals connate for 1.5 mm., much ex- 



ceeding the floral bracts ; leaves 4 cm. wide. 



18. N. macahensis 

 20. Pedicels 5-10 mm. long. 

 21. Leaves strongly sulcate beneath with the scales wholly 

 within the grooves, usually acuminate and cuspidate. 



19. N. cyanea 

 21. Leaves nearly or quite even beneath, broadly acute or 

 rounded. 

 22. Blades of the leaves wholly green with sparse inconspicu- 

 ous scales; floral bracts slightly exceeding the ovary, 

 obscurely serrulate toward the apex ; petals white. 



20. N. albiflora 

 22. Blades of the leaves bicolorous, densely pale-lepidote be- 

 neath ; floral bracts equaling the mid-point of the sepals 

 or higher. 

 23. Leaf -blades marked beneath with transverse bands; 



petals violet 21. N. tristis 



23. Leaf -blades without bands but sometimes spotted ; petals 



white 22. N. sarmentosa 



14. Sepals 19-37 mm. long; flowers 40 mm. long or more; plants generally 

 large. 

 24. Leaf-sheaths concolorous. 

 25. Blades of the leaves concolorous on each side or with a few spots. 



