1953] 



RE VISION OF BRACHYOTUM 



397 



Type Collection and Locality: Mathews 1254 (LECTOTYPE K); Peru, Dept. 

 Amazonas, "ad Bajasan prov. Chachapoyas." 



Illustration: Weberbauer, El Mundo Vegetal de Los Andes Peruanos 525, /. 

 61a (1945). 



Distribution: Dept. Amazonas, Peru, alt. 3000-3200 m. 



Cerro de Fraijaco northeast of Tambo de Ventilla, Pennell 15854 (PH); Piscohuanuma 

 Pass, Sandeman 57 (K). 



Markgraf recognized the two entities involved in the collections of B. lyco- 

 podioides and B. markgrafii, but did not realize that Triana's description encom- 

 passed both elements. Unfortunately, Macbride (1941, p. 269) designated Mathews 

 1254 as the type collection of B. lycopodioides, and this collection coincides 

 with B. minimum. Triana's description is so inconclusive that Macbride's desig- 

 nation must stand, thus synonymizing Markgraf's epithet. 



The packet containing the only specimen examined of Weberbauer 4399 (BR, 

 collected at Chachapoyas) has a mixture of B. lycopodioides and B. markgrafii. 

 The photograph (Gleason 27-9) of a sheet of this collection at Berlin seems to 

 indicate that a portion of another collection, perhaps Weberbauer 2072 which is 

 B. markgrafii, was inadvertently mixed with Weberbauer 4399. 



40. Brachyotum rosmarinifolium (R. & P.) Triana, Trans. Linn. Soc. 28: 49. 1871. 



Rhexia rosmarini folia R. & P. Fl. Peruv. & Chil. 3: 84. 1802. 

 Arthrostemma rosmarini folia (R. & P.) DC. Prodr. 3: 136. 1828. 



Chaetogastra rosmarini folia (R. & P.) Naudin, Ann. Sci. Nat. III. 14: 131, quoad syn. 

 1850. 



Trichomes very minutely and sparsely to moderately roughened (to smooth ?). 

 Branchlets obscurely quadrangular, moderately to densely strigulose. Petiole 1-3 

 mm. Blade 6-12 x 3-4 mm., oblong-elliptic to lance-oblong with the apex and 

 base obtuse, the 3 primaries deeply impressed above and below elevated, the 6- 

 10 pairs of secondaries obscured by the pubescence above and below; above 

 densely strigulose, the stout hairs 3-8/mm. 2 with their basal %-% adherent and 

 0.1-0.3 mm. diam. but apically gradually attenuate; below very densely strigu- 

 lose. Flowers predominantly 5~merous, mostly ternate but occasionally with an 

 additional pair of flowers at the node below the dichasial node and then the 

 slightly reduced leaves subtending the dichasium early caducous. Pedicel 1-3 

 mm. below the bracteoles, 1-8 mm. above; pedicellar bracteoles 4-9 x 1-2 mm., 

 narrowly elliptic, early caducous, pubescent as the leaves except for the gla- 

 brous adaxial apical Hypanthium 4.5 x 4.5 mm., 0.3 mm. thick medianly, 

 moderately to densely strigulose to short-strigose, the hairs 10-12/mm. 2 Sepals 

 6-6.5 x 3-4 mm., oblong with obtuse apices, united at bases 1 mm., the sinuses 

 acute. Petals deep purple, 15-16 x 12-13.5 mm., asymmetrically obovate with ob- 

 tuse apices, the gland-tipped cilia 0.3-0.4 mm. Filaments 5-5.5 mm.; anthers 5 

 mm.; connective at anther base 1.7-2.2 mm., free of the anther 0.8-1.4 mm., the 

 ventral lobes each 0.3-1.2 x 0.6-0.7 mm. Style 23 x 0.5 mm., exserted 6-9 mm. 

 Ovary 5.5 x 3 mm., densely strigulose with gland-tipped hairs on the apical 2-2.5 

 mm., the apical lobes 0.2-0.3 mm. above the locules. 



Type Collection and Locality: Ruiz & Pavbn s.n. (SYNTYPES presumably at 

 MA; isosyntype F); Peru, Depts. Huanuco and Junln, "in Huanuci et Tarmac" 



Type Photographs & Illustrations: F16907 and Gleason 27-10 (destroyed syn- 

 type at B); Fl. Peruv. & Chil. 3: pi. 318, f. a (1802) (as Rhexia rosmarinifolia). 



Distribution: central Peru, alt. 3000-4200 m. 



Huanuco: Mito, Macbride & Featherstone 1870 p.p. (F, G-DEL p.p., NY); "Torre- 

 huasi," Woytkowski 326 (F). 



