OF ARTS AND SCIENLE.S. 



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pubescent corymbs ; calyx deeply cleft, -I to nearly 1 line long ; co- 

 rolla white, neaily 2 lines long: fruit unlvnowu. — At the base of the 

 mountains near Lake Chapala; May, 1890 (n. 3085), 



BoKRHAAViA OCTANDKA. Stems slender, dichotoraously and di- 

 varicately branched, glabrous or {)ul)erulent above: leaves broadly 

 ovate, acutish or abruptly short-acuminate, rounded at base, sparsely 

 pubescent and shortly ciliate, |- to 1| inches long- umbels terminal, 

 few - many-flowered, the flowers neaily sessile ; perianth tubular to 

 funnelform with a short slightly dilated limb, green with a tinge of 

 red, 2 lines long: stamens 8, exserted , fruit oblong, 4 lines long by 

 1^ broad, glabrous with a i'cw scattered tubercles.- — Much resembling 

 B. scandens in habit and foliage. On river-banks near Guadalajara ; 

 October, 1889 (n. 2958). 



Ahistolochia (Gymnolobus) NANA. Stems procumbent, from 

 a slender subterranean branching rhizome, slender and flexuous, 3 to 

 6 inches long, leafy, nearly glabi'ous : leaves from renlform-cordate to 

 deltoid- cord ate, very obtuse or acutish and with broad rounded basal 

 lobes, 3 to 8 lines long, on short petioles : flowers solitary in the axils, 

 nearly sessile; ovary pubescent, narrow, 2 lines long; perianth dark 

 brown, narrowly tubular and nearly straight, \^ to 2 J inches long, 

 the elongated narrow blade exceeding the tube, the scarcely dilated 

 base of the tube closed by a glabrous diaphragm with a circular cen- 

 tral orifice : anthers 5 : capsule depressed-globoso, 6 lines broad. — 

 Collected by Prof. A. Duges of Guanajuato in 1883 at Guadalcazar 

 in the State of San Luis Potosi, and by Mr. Pringle iu August, 1890 

 (n. 3630), on dry limestone hills at San Jose Pass in the same State. 



Piper (Enckea) Jaliscanum. Shrubby, 8 feet high, glabrous : 

 leaves oblong-ovate to round-ovate, acute or short-acuminate, abruptly 

 short-cuneate at base, 5-7-nerved, \\ to 3 inches long, on slender peti- 

 oles 3 to 7 lines long, not punctate, becoming thiekish, rather rigid and 

 glaucous : spikes slender, on peduncles nearly equalling the petioles, 9 

 to \ii lines long, becoming 24- inches long in fruit, densely flowered: 

 flowers 6-androus : fruit sessile, oblong, obtusely quadrangular, a line 

 long. — Canons near Guadalajara, in dense raoist shade, Dr. E. 

 Palmer, June, 1886 (n. 122), in flower, and Mr. C. G. Pringle iu 

 December, 1888 (n. 2153), in young fruit. 



Peperomia Jaltscana. Herbaceous, the short stem from a small 

 tuberous root, glabrous: leaves 2 to 4, one radical, the rest cauline and 

 alternate, suborbicular, cordate at base, very obtuse or rounded at the 

 summit, thin, 2 to 5 inches broad, on petioles G to 12 lines long or 

 more: spikes 2 to 4, axillary and terminal, pedunculate, slender and 



VOL. XXVI. (n S. XVIII.) 10 



