New Species of South American Plants 31 



The plant is probably dimorphous, the above being a descrip- 

 tion of the flower with long styles. 



Xanthoxalis flagellata. 



Pilose with divergent gland-tipped hairs. Branches much 

 elongated, slender, strongly sulcate. Stipule 4 to 6 mm. long, 

 lanceolate, costate, adnate to the base of the petiole, which is 

 sharply reflexed at the summit of the stipule, the reflexed por- 

 tion 2 to 3 cm. long, slender, costate. Leaflets 12 to 20 mm. long, 

 and wide, obcordate with broad, shallow, rounded sinus, a 

 slight point in the center, thin, drying yellowish, the margin 

 sparsely ciliate, the venation obscure. Peduncles to 7 cm. long, 

 filiform. Calyx campanulate, 5 mm. long, 3 mm. broad, the 

 sepals lanceolate, obtuse. Corolla 12 mm. long. Dissection 

 material wanting. Fruit not seen. 



'Unduavi, Bolivia, 3,300 meters altitude, November 1910." 

 (Otto Buchtien, No. 2877.) 



Xanthoxalis moUissima. 



Densely pilose with spreading or mostly reflexed hairs. 

 Stems stoutish, but weak, coarsely nodose, the base said to be 

 woody. Stipules short, adnate, densely pilose and not clearly 

 visible. Petioles to 12 cm. long, stout, erect, sulcate. Leaf- 

 lets 3, sessile, 3.5 to 4.5 cm. long, 2.5 to 4 cm. broad, the ter- 

 minal regularly obcordate with cuneate base, deep acute sinus 

 and rounded lobes, the lateral a little oblique, thickish for this 

 genus, densely pilose on both sides, the hairs coarse, appressed, 

 the venation not prominent. Peduncle (but one seen) 2 dm. 

 long, ascending, bifid at the summit, the branches subtended 

 by linear green bracts 5 mm. long, the pedicels with similar 

 ones. Flowers crowded on the branches, the pedicels at length 

 6 mm. or more long. Calyx 5 or 6 mm. long, green, thickish, 

 the sepals apparently obtuse. Corolla nearly 2 cm. long, 

 stoutly green-nerved. 



Dissection material wanting. 



"A shrub, to i meter, Unduavi, Bolivia, 3,300 meters alti- 

 tude, November 1910.' (Otto Buchtien, No. 2882.) 



Xanthoxalis biflexa. 



Younger portions sparsely pilose with short, soft, white 

 hairs, the leaves gray-tomentellate. Stems prostrate and 

 ascending, tufted, to i dm. long, slender, angled, reddish. 

 Stipules 2 mm. long, oblong or ovate, obtuse or acutish, mostly 

 free, adnate at the base, hyaline. Petioles to 2 cm. long, fili- 

 form. Leaflets 3, sessile, 3 to 5 mm. long, 2 to 4 mm. broad, 

 obovate, with cuneate base and rounded summit, thick, gray- 

 green. Peduncle axillary, filiform, i-flowered, i to 2 cm. long, 



