1953] 



REVISION OF BRACHYOTUM 



381 



PERU: Cuzco: Pinasniocc, Cook & Gilbert 1861 (US); near Huallahualla, Vargas 9708 

 p.p. (G-DEL, UC p.p.); without definite locality, Gay s„n. (syntype P), Weddell 4772 (syn- 

 type P). Apurimac: between Huancarama and Cochacaya, West 3766 (GH, UC). Puno: 

 "Prov. de Carabaya," Raimondi 8939 (USM); near Limbani, Metcalf 30492 (G-DEL, NY, 

 UC, US). 



BOLIVIA: La Paz: Igenio, R. S. Williams 838 (NY); between Tararani and Yani, Kru- 

 koff 11467 (NY); near Sorata, Mandon 640 p.p. (BR p.p., GH p.p., W p.p.); between Unduavi 

 and Corvice, Buchtien 4001 (GH, NY, US). Cochabamba: Yungas, Pearce s.n. (K). With- 

 out province: Mandon 639 (NY). 



Vernacular Names: Masuca (Cook & Gilbert 1861); Macha (West 3766); Aganto 

 (Raimondi 8939). 



Lechler 1856 was designated by Macbride (1941, p. 268) as the type collec- 

 tion; of the several sheets of this collection annotated by Cogniaux (BR, G-BOIS, 

 G-DC, P), the Boissier Herbarium specimen is perhaps the best and might be con- 

 sidered as the lectotype. 



Vegetatively, the extremely glabrous forms of B. grisebachii are indistinguish- 

 able from the glabrous forms of B. sanguinolentum and also, to some extent, B. 

 cernuum. Cook & Gilbert 1861 has the foliage and persistent petal cilia glands of 

 B. naudinii, but the inflorescence, sepals, and petal shape of the remainder of the 

 specimens cited here. B. grisebachii is very closely related to B. naudinii, B. 

 huancavelicae , and B. nutans; from the latter species, it may be differentiated by 

 the longer sepals, larger leaves, somewhat differently shaped petals, and much 

 more densely pubescent hypanthia. 



22. Brachyotum huancavelicae Wurdack, sp. nov. 



Trichomata gracilia laevia vel sparse muriculata. Ramuli novelli quadrangulati 

 cum petiolis pedicellisque sparse strigulosi. Petiolus 4-7 mm. Lamina 15*30 x 6- 

 10 mm. lanceolata apice acuta basi obtusa vel subtruncata, nervis primariis 3 su- 

 pra impressis subtus expressis, secundariis supra invisis subtus leviter anguste- 

 que expressis et laxe reticulatis; supra sparse vel modice brevi-strigosa aut 

 strigulosa, pilis 2-ll/mm. 2 basi %- l / 2 adhaerentibus; subtus sparse vel modice 

 laxo-strigulosa 3~ll/mm. 2 , glandibus solitariis sparsis 5-20/mm. 2 Flores fere 

 semper 4-meri, in axillis oppositis confertis foliorum superiorum solitarii. Pedi- 

 cellus 0.5-3 mm. sub bracteolis, 5-8 super; bracteolae 4-6 x 0.5-2 mm. spathu- 

 latae trinervatae persistentes vel caducae. Hypanthium 4.8-5.5 x 3.5-5 mm., medio 

 0.2-0.3 mm. crassum, cum sepalis sparse brevi-strigosum vel strigulosum, pilis 

 tenuibus 5-10/mm. 2 Sepala 5.5-10 x 4-5 mm. lanceolata apice anguste acuta basi 

 per 0.8-1 mm. cohaerentia et leviter ampliata, sinu lato. Petala 15*23 x 12-16 

 mm. obovata et leviter asymmetrica apice obtusa, ciliis 0.1-0.4 mm. (paucis ter- 

 minalibus ad 0.7-0.8 mm.) non-glandulosis aut glandulis valde caducis. Filamenta 

 3.5-7.5 mm.; antherae 3.5*7 mm.; connectivum basi antherae (0.8-)1.5*2 mm., ab 

 anthera per (0.4*)0. 7-0.9 mm. liberum, lobis ventralibus 0.1-0.7 mm. Stylus 25* 

 33 x 0.4-0.5 mm., per 7-9 mm. exsertus. Ovarium 4.5-5.5 x 3 mm. apice per 2-2.5 

 mm. modice brevi-strigosum, lobis apicalibus super loculos 0.6-1.3 mm. 



Type Collection and Locality: Stork & Horton 10295 (HOLOTYPE F; isotypes 

 G-DEL, UC); Peru, Dept. Huancavelica, Prov. Tayacaja, quebrada south of Salca- 

 bamba in shrubwood, sandy loam, 8 Jan. 1939. "Shrub 1-1.5 m.: corolla very dark 

 violet: fr. immature." 



Distribution: southern Dept. Junln to northern Dept. Huancavelica, Peru, alt. 

 3000-3300 m. 



Junln: Hda. Runatullu near Comas, Ochoa 725 (NY). Huancavelica: between Colca- 

 bamba and Paucarbamba, Raimondi 10202 (USM). 



It is with misgivings that another epithet is added to the complex of poorly 

 defined species around B. naudinii and B. grisebachii. The flowers of B. huan- 



