NO. I 



BROMELIACEAE OF BRAZIL — SMITH 



187 



2. Inflorescence amply tripinnate. 

 3. Floral bracts 20-30 mm. long ; spikes capitate at the ends of the branches ; 



posterior sepals broadly alate-carinate. (Fig. 91,) 2. H. stellata 



3. Floral bracts 12-18 mm. long; spikes usually separated along the 

 elongate branches. 

 4. Sepals and floral bracts serrulate; spikes aggregated in clusters that 

 are mostly broader than long 3. H. brachycephala 



Fig. 90. 



Fig. 89. — Wittrockia campos-portoi: a. Habit, X i/io; b, inflorescence X l4'> 

 c, floral bract, Y, i; d, flower Y^ i; e, sepals, Y i; f, corolla lobes and stamens, 

 y, i; g, longitudinal section of ovary, X i. 



Fig. 90. — Wittrockia astir ea: a, Habit, X /^ J ^^ floral bract and flower, X i; 

 c, sepal, y^i; d, base of petal, X 2 ; e, longitudinal section of ovary, X i. 



4. Sepals and floral bracts entire. 



5. Spikes broad and spiny because of the spreading floral bracts ; mucro 



of the sepal 2-3.5 nim. long 4. H. horrida 



5. Spikes smooth and slender because of the erect or suberect floral 

 bracts. 

 6. Branches of the inflorescence not more than 20 cm. long. 



5. H. catingae 

 6. Branches of the inflorescence 25-40 cm. long. 



6. H. caruaruensis 

 X. Floral bracts broadly acute or obtuse, usually mucronate. 

 7. Branches of the inflorescence very short. 

 8. Inflorescence densely bipinnate from a few spikes ; floral bracts muticous, 

 20 mm. long 7- H. membranostrobilus 



