1953] 



REVISION OF BRACHYOTUM 



399 



Trichomes minutely and moderately roughened. Branchlets obscurely quad- 

 rangular, densely to moderately fine-hirsute to strigose or strigulose, the hairs 

 mostly eglandular, occasionally with some intermingled gland-tipped hairs. Peti- 

 ole 1-6 mm. Blade (5-)10-25 x (2-)5-13 mm., ovate to elliptic or oblong-elliptic 

 with the apex bluntly acute or rounded and the base obtuse to truncate, the 3 pri- 

 maries narrowly impressed above and elevated below, the 8-15 pairs of second- 

 aries above obscurely impressed or obsolete and below narrowly elevated but 

 mostly obscured by the pubescence; above moderately short- (rarely long-) stri- 

 gose, the hairs 2-5(-8)/mm. 2 on low callosities and in 10 or more irregular rows 

 with the adherent expanded bases 0.2-0.5("1.5) mm. diam. and the more or less 

 abruptly attenuate free apices (0.2-)0.5-l(-3) mm. long; below densely to very 

 densely loose-strigulose to fine-hirsutulous, the hairs (10-)15"*30/mm. 2 and mostly 

 eglandular but occasionally with intermingled gland-tipped hairs, the glands soli- 

 tary and dense (15-60/mm. 2 ) but obscured by the trichomes. Flowers predomi- 

 nantly 5-merous, mostly ternate (rarely a few solitary) or sometimes with an addi- 

 tional pair of flowers at the node below the dichasial node or the dichasia ter- 

 nate. Peduncle of dichasium (5-)10-25 mm. long and slender (about l / 2 ~% diam. of 

 the supporting branchlet); bracts at base of the dichasium 3*10 x 1-4 mm., per- 

 sistent until anthesis, with pubescence as in leaves or above glabrous. Pedicels 

 0.5-7 mm. below bracteoles, 1-7 mm. above; pedicellar bracteoles 1.5-6 x 0.3*2 

 mm., mostly caducous before anthesis, above glabrous or apically strigulose, be- 

 low moderately loose-strigulose. Hypanthium 4-8x4-6 mm., 0.2-0.5 mm. thick 

 medianly, sparsely to moderately strigulose or appressed-hirsutulous, the fine 

 hairs 6-12(-15)/mm. 2 and eglandular or in part gland-tipped. Sepals 4-7 x 3"4.5 

 mm., narrowly oblong-ovate to triangular-ovate with the apices acute, united at 

 bases 0.6-1 mm., the sinuses rounded-acute. Petals yellowish (or purple fide 

 Naudin), 9- 16 x 8-12 mm., asymmetrically obovate with the apices obliquely trun- 

 cate, outside glabrous or very sparsely strigulose at base and apex, the gland- 

 tipped cilia 0.1-0.5 mm. Filaments 3.5*7.5 mm.; anthers 4-6.5 mm.; connective at 

 anther base not prolonged (rarely free of anther 0.15 mm. or less). Style 15-20 x 

 0.5-0.7 mm., exserted 4-8 mm. Ovary 4-7 x 2.5-3.5 mm., moderately strigulose on 

 the apical 2-3 mm., usually the hairs in part gland-tipped, the apical lobes 0.1- 

 0.3 mm. above the locules. 



Type Collection and Locality: Dombey s.n. (HOLOTYPE presumably at P; 

 isotypes BM, BR, F, G-DEL, L, P, US); "Peruvia," probably in Depts. Huanuco, 

 Pasco, or Junin. 



Type Photographs: F38256 (isotype of B. rostratum at P); Gleason 27-12 and 

 F16718 (destroyed isotype of B. rostratum at B); F36133 (holotype of B. micro- 

 phyllum at P); Gleason 51-4 (isotype of B. trianaei, at G-DC ?); F 16719 (des- 

 troyed isotype of B. trianaei at B); F63423 (holotype of B. callosum at F). 



Distribution: north central to southeastern Peru, alt. 3100-4100 m. 



Cajamarca: Llama, Sandeman 4118 (K). Ancash: between Tallenga and Pachapaque, 

 Ferreyra 7504 (USM). Huanuco: northeast of Huanuco, Macbride & F eatberstone 2181 

 (holotype of B. callosum F; isotypes G-DEL, NY,S, US); south of Mito, Macbride & Feath- 

 erstone 1871 p.p. (A p.p., F p.p., W). Junin: Goyllarisquisga, Asplund 11900 (S); Hua- 

 capistana, Weberbauer 2218 (BR, G-DEL, S); between Vitoc and Palca, Isem 583 (F); 

 Hda. Runatullu, Ochoa 206 (S, US). Huancavelica: between Salcabamba and "Ampurco," 

 Stork & Horton 10429 (F, G-DEL, UC). Cuzco: Paso de Tres Cruces, Pennell 13847a 

 (NY, PH), Vargas 2057 (NY); Paucartambo, Soukup 387 (F). Puno: "Tabina" near Aya- 

 pata, Lechler 2061 (holotype of B. trianaei BR; isotypes BR, G-BOIS, K, P, S, W; frag- 

 ment F); near Limbani, Metcalf 30548 (G-DEL, NY, UC, US). Without Department: Bonp- 

 land s.n. (hoiotype of B. microphyllum P; fragment F); Raimondi 9439 (USM). 



Vernacular Name: Pinchos {Ochoa 206), 



