1953] 



REVISION OF BRACHYOTUM 



357 



5-celled, pubescent apically with apical lobes more or less developed above the 

 iocules; ovules axile, numerous. Fruit capsular, dry, loculicidal; seeds coch- 

 leare, pitted. 



Genotype: Bracbyotum quinquenerve (R. & P.) Triana. 



Key to the Species of Bracbyotum 



1. Flowers mostly in 2-3-flowered dichasia, the dichasia sometimes aggregated in corym- 

 bose or paniculate inflorescences 20. 



1. Flowers mostly solitary, on short branchlets or in opposite upper leaf axils of branch- 

 lets 2. 



2. Hypanthium not invested by pedicellar bracts or bracteoles, these smaller than leaves. 

 7. 



2. Hypanthium closely invested by two or more pedicellar bracts which are persistent at 

 least until anthesis and often as large or larger than leaves 3. 



3. Hypanthial trichomes notably roughened; calyx lobes moderately glandular-strigulose 

 within. 32. B. cogniauxii. 



3. Trichomes smooth; calyx lobes glabrous within 4. 



4. Style densely incurved-puberulous on basal 1/3, not exserted at anthesis 



5. B. campii. 



4. Style glabrous, exserted at anthesis 5. 



5. Leaf blades 11-16 X 7-12 mm., with 5 primary veins 4. B. andreanum. 



5. Leaf blades 6-12 X 3~6 mm., with 3 primary veins 6. 



6. Flowers predominantly 5-merous; floral bracts densely sericeo-strigose without; ovary 

 trichomes gland-tipped 31* B. confertum. 



6. Flowers predominantly 4-merous; floral bracts medianly moderately strigulose but mar- 

 ginally nearly glabrous without; ovary trichomes non-glandular 30. B. jamesonii. 



7. Leaf blades above glabrous to sparsely, moderately, or densely strigulose or short- 

 strigose; if less than 10 mm. long, glabrous or sparsely strigulose 9. 



7. Leaf blades above densely tuberculate, 4-7 mm. long (flowers 5-merous; petals deep 

 purple, with non-glandular cilia) 8. 



8. Tubercles of upper leaf surface large, 1-2/mm. 2 ; calyx lobes broadly ovate, the re- 

 curved apices tuberculate or stout-strigulose within; apical lobes of ovary 0.5-1 nim. . 

 3 5. B. fictum. 



8. Tubercles of upper leaf surface smaller, 7-8/mm. J ; calyx lobes oblong, not recurved, 

 glabrous within; apical lobes of ovary 0.1 mm 34. B. ecuadorense. 



9. Hypanthial and lower leaf surface trichomes smooth 13. 



9. Hypanthial and lower leaf surface trichomes roughened 10. 



10. Trichomes notably plumulose, on lower leaf surface graded in size with the very nu- 

 merous smaller ones almost stellate; petals yellowish; connective usually not pro- 

 longed ventrally nor free of anther base 14. B. ledi folium. 



10. Trichomes minutely roughened, on lower leaf surface never pseudo-stellate; petals 

 deep purple; connective always prolonged ventrally and free of anther base more than 

 0.3 mm 11. 



11. Calyx lobes with apical % to % narrowly lanceolate, basally somewhat expanded, with 

 broadly acute to obtuse sinuses; petal cilia non-glandular or the glands very early 

 caducous 22. B. huancavelicae. 



11. Calyx lobes oblong-lanceolate to oblong-ovate, basally not expanded, with narrow si- 

 nuses; petal cilia obviously and persistently gland-tipped 12. 



12. Leaf blades 10-30 X 6-14 mm.; calyx lobes acute, sparsely strigulose on apical % to 

 % within 25. B. tyrianthinum. 



12. Leaf blades 5-17 X 4-7 mm.; calyx lobes rounded to broadly acute, glabrous within. . . 

 24. B. naudinii. 



13. Leaf blades above sparsely to densely pubescent; calyx lobes pubescent at least 

 along midrib for greater part of length without 15. 



13* Leaf blades above glabrous; calyx lobes glabrous except for a very few hairs at ex- 

 treme base without 14. 



14. Flowers 5-merous; hypanthium beset with stout patent setae 33. B. tricbocalyx. 



14. Flowers 4-merous; hypanthium glabrous or very sparsely strigulose. ... 23. B. nutans. 

 15« Leaf blades below sparsely to moderately strigulose or glabrous, the hairs to 7/mm. 2 ; 



calyx lobes glabrous within 17. 



15. Leaf blades below very densely rufolanulose, the hairs 30-40/mm. 2 ; calyx lobes mod- 

 erately strigulose on apical % to \ within 16. 



