1953] 



REVISION OF BRACHYOTUM 



367 



narrowly to broadly acute, united at bases 0.7-1.1 mm., the sinuses acute, inside 

 moderately strigulose on the apical %-\» Petals deep purple, 13-16 x 11-13 mm., 

 obovate with the apices very broadly obtuse, the gland-tipped cilia 0.1-0.3 mm. 

 Filaments 6-6.5 mm.; anthers 5.5*6<,5 mm.; connective at anther base 0.8-1 mm., 

 free of the anther 0.4-0.5 mm., the ventral lobing 0.2-0.4 mm. Style 26 x 0.9 mm., 

 exserted 5 mm. Ovary 5-7.5 x 3.5-4 mm., densely strigulose with gland-tipped 

 hairs on the apical 2-3.5 mm., the apical lobes 0.7-1 mm. above the locules. 



Type Collection and Locality: Mathews s.n. (HOLOTYPE G-BOIS; isotypes 

 BR, NY); "in Peruviae ad Chachapoyas." 



Type Photograph: F36853 (holotype). 



Distribution: Dept. Amazonas, Peru, alt. 2800-2900 m. 



Cerro de Fraijaco northeast of Tambo de Ventilla, Pennell 15842 (PH). 



B. barbeyanum is very similar to B. parvifolium, but differs in the generally 

 larger proportions, glandular ovary pubescence, and petal color. 



9. Brachyotum intermedium Wurdack, sp. nov. 



Trichomata minute modiceque aspera. Ramuli novelli quadrangulati cum peti- 

 olis pedicellisque densissime rufo-gracili-strigosi. Petiolus 10-15 mm. Lamina 

 28-42 x 15-23 mm. elliptica apice basique obtusa, nervis primariis 5 supra gra- 

 ciliter impressis subtus expressis sed non vel vix reticulatis; supra modice strig- 

 ulosa, pilis gracilibus 5-7/mm. 2 basibus % adhaerentibus et non expansis; subtus 

 densissime rufo-sericeo-strigulosa 35-40/mm. 2 Flores 5*meri terni vel duo addi- 

 ticii in nodo sub dichasii nodo. Pedicellus 0-1 mm. sub bracteis, 3-4 mm. super; 

 pedicelli bracteae 8-12 x 3.5-6 mm. ellipticae vel subobovatae persistentes pu- 

 bescentia foliorum eadem. Hypanthium 5.5 x 5.3 mm., medio 0.3 mm. crassum, 

 densissime rufo-strigosum. Sepala 5.5*6 x 3.5*4 mm. triangulari-ovata apice acuta 

 basi per 0.8-1 mm. cohaerentia, intus parte l / 4 apicali sparse strigulosa. Petala 

 purpurea 11.5-12 x 8.5*9 mm. obovata apice obtusa extus apice extremo sparsis- 

 sime strigulosa aliter glabra, ciliis glandulosis 0.1-0.3 mm. glandulis modice 

 caducis. Filamenta 4-4.5 mm.; antherae 4.5 mm.; connectivum basi antherae 0.9-1 

 mm., ab anthera per 0.4-0.5 mm. liberum, lobis ventralibus 0.3 mm. Stylus 19*21 x 

 0.9 mm., per 8 mm. exsertus. Ovarium 5 x 2.5 mm., apice per 2.5 mm. dense strigu- 

 losum, lobis apicalibus super loculos 0.5 mm. 



Type Collection and Locality: Mathews 3210 p.p. (HOLOTYPE K); Chacha- 

 poyas, Dept. Amazonas, Peru. Known only from the type collection. 



Type Photograph: Gleason 88-10 p.p. (holotype). 



The holotype of this species is mounted on the same sheet as the holotype of 

 B. radula, and Triana's description of that species included B. intermedium; how- 

 ever, his description of the upper leaf surface pubescence clearly applies only to 

 B. radula. From that species, B. intermedium may be distinguished by the obvi- N 

 ously 5-nerved leaves with somewhat longer petioles, the upper leaf surface with 

 fine hairs, the non-reticulate secondary veins on the lower leaf surface, the se- 

 pals which are pubescent within, and the nearly glabrous petals. The trichomes 

 are much less densely roughened than in B. radula or B. maximowiczii. These tri- 

 chomes, the internal sepal pubescence, and general appearance suggest linkage 

 with B. barbeyanum. 



10. Brachyotum radula Triana, Trans. Linn. Soc. 28: 48. 1871. 

 Brachyotum asperum Cogniaux, Bot. Jahrb. 42: 132. 1908. 



Trichomes notably and densely roughened, as in B. ledifolium. Branchlets 

 rounded-quadrangular, densely strigulose. Petiole 4-11 mm. Blade 20-50 x 10-30 

 mm., elliptic to ovate-elliptic with the apex obtuse or rounded and the base ob- 

 tuse, the 3 primaries deeply impressed above and elevated below, the numerous 



