1953] 



REVISION OF BRACHYOTUM 



377 



duced leaves. Pedicel 2-60 mm. below the bracteoles, 3-15 mm. above; pedi- 

 cellar bracteoles (or bracts) 5-25 x 1-8 mm., 3-nerved, linear or narrowly elliptic 

 to spatulate or narrowly ovate, sometimes leaflike, caducous in late bud or per- 

 sistent until fruit, pubescent as the leaves or the smaller glabrous above. Hypan- 

 thium 5-9 x 4-8 mm., fleshy and 0.5-1.4 mm. thick medianly, moderately to densely 

 short- to long-strigulose, the hairs (10-)15-25(-40)/mm. 2 Sepals (3-)4-6(-7) x (3-) 

 4-5 mm., united at bases l-2(-3) mm., the lobes acuminate-triangular to triangular-, 

 the sinuses broad and rounded. Petals deep purple, (14-)l6-19(-23) x (ll-)13-l6 

 (-21) mm., asymmetrically obovate with the apices very broadly obtuse to almost 

 truncate and with small midvein acumens, the cilia 0.1-0.4 mm. (the terminal few 

 to 1 mm.) and tipped with inconspicuous early-caducous glandular tips. Filaments 

 (4-)5-7 mm., as long as the anthers; connective at anther base 1-1.8 mm., free of 

 the anther 0.3-0.7 mm., the ventral lobing 0-0.6 mm. Style 20-36 x (0.5-)0.8-1.3 

 mm., apically tapered usually noticeably, exserted 4-15 mm. Ovary 5.5-10.5 x 

 3.5-5 mm., moderately to densely strigulose to short-strigose on the apical 3—7 

 mm., the apical lobes 1-4.5 mm. above the locules. 



Type Collection and Locality: D'Orbigny 481 (HOLOTYPE P); near "Carcuata- 

 Yungas." This locality is perhaps Circuata, Dept. La Paz, Bolivia. 



Type Photographs and Illustrations: F36132 (HOLOTYPE); New York s.n. 

 (holotype of Cbaetogastra hermannioides); F36128 (isotype of Chaetogastra her~ 

 mannioides at P); F36138 (presumed holotype of Chaetogastra pentlandii at P); 

 New York s.n. (holotype of Brachyotum setosum); Ann. Sci. Nat. III. 14: pL 4, f. 6 

 (1850) (as Chaetogastra hermannioides). 



Distribution: northwestern Bolivia to extreme northwestern Argentina, alt. 

 1900-3800 m. 



BOLIVIA: La Paz: near Pelechuco, Pearce s.n. (K), R. S. Williams 2471 (NY); between 

 Ocara and Ancoma, Tate 860 (NY); Tusuhuaya, Cardenas 1315 (NY); near Sorata, Mandon 

 641 (BR, G-BOIS, K, P, S, W), Weddell s.n. (P); "San Felipe" in Prov. Sur Yungas, Asp- 

 lund 1803 (S); near Unduavi, Asplund 1845 (S), Buchtien 219 (F, G-DEL, GH, K, NY, SI), 

 Buchtien 2916 (BR, US), Eyerdam 25368 (F, G-DEL, UC), Julio 325 (US), Rusby 2340 (F, 

 G-BOIS, GH, MICH, NY, P, PH, US); base of Illimani, Pentland s.n. (isotype of Chaeto- 

 gastra pentlandii P; fragment F); "Nequejahuira" in Cordillera Real, Tate 660a (NY); Ca- 

 racoles, Nichols & Eggers s.n. (F); near Pongo, Tate 181a (NY), White 151 (holotype of 

 B. setosum NY; isotypes GH, MICH, PH, US). Cochabamba: "Sailapata" in Prov. Ayo- 

 paya, Cardenas 3056 (GH, P, S, US), Cardenas 3214 (F); Yungas, Bang 695 (F, G-BOIS, 

 GH, MICH, NY, PH, US, W); below "Llanta Aduana" in Prov. Chapare, Balls B6277 (GH, 

 NY, UC, US); "Plumerito" between Colomi and Tablas, Cardenas 3981 (US); Incachaca, 

 Werdermann 2015 (S); near Colomi, Balls B6249 (GH, NY, UC, US); Sacaba, Steinbach 5948 

 (F, LIL, NY, SI); Cochabamba, Bang s.n. (NY, US); near Pocona, Steinbach 8667 (F, GH, 

 K, NY, S). Santa Cruz: between Comarapa and San Mateo, Herzog 1913 (BR, L, S, W), 

 Steinbach 8512 (GH, NY). Chuquisaca: Prov. Tomina, Weddell 3784 (holotype of Chaeto- 

 gastra hermannioides P; isotype F); near Padilla, Carriker s.n. (PH); without definite lo- 

 cality, Weddell 3783 (P). Tarija: "Narvais" between Tarija and Chaco, Fries 1283 (S, 

 US); Tucumilla near Tarija, Fiebrig 2458 (A, BR, G-DEL, GH, K, L, P, S, US, W). With- 

 out Department: Bridges s.n. (BR, G-BOIS, K) Cuming s.n. (W), Lobb s.n. (W), Pearce 709 

 (K). 



ARGENTINA: Jujuy: "Tirasi near Volcan, Castillon 399 (LIL, NY), CastilVon 9378 

 (LIL, NY), Castillon 9474 (LIL, NY); "Juan Gaban" near Leon, Castillon 538 (LIL, NY); 

 Yala, Burkart & Troncoso 11264 (NY), O'Donell 4880 (LIL). 



There are no noticeable criteria for specific delimitation of the three epithets 

 here involved. The "pentlandii'* element would typically be represented by speci- 

 mens with compact inflorescences, elliptic round-tipped leaf blades (15-35 x 8-16 

 mm.) with length/width ratio of 1.8-2.6 and with the upper surfaces sparsely strig- 

 ulose (1-2/mm. 2 ), sparsely strigulose branchlets, and ovary apex lobes 2-4.5 mm. 

 long: P entland s.n., Nichols & Eggers s.n. , White 151 , Cardenas 3214, and Bridges 

 s.n. Similar but with upper leaf surface pubescence 2-7/mm. 2 and ovary apex 



