566 PROCEEDINGS OF THE AMEBICAN A.CADEMT. 



nerves: caly* sparingly pubescent or glabrate, salverform, with shorter 

 broader lobes. — Pi ebla, near Metlaltoyuca, alt. 250 m.,Jan. 81, 1898 

 i /.'. .1. Goldman, uo. 18). 



H. (Hypenia $ Laxiflorae) Nelsonii. Tall. Btem smootli and 

 -v below, minutely puberulent above: Leaves thick, glabrouB, rather 

 glaucous, lance-acuminate, slightly auriculate-claspicg at base, ihose of 

 the stem 1.-") to - dm. long, with line short teeth along the margin, the 

 upper much shorter and entire : panicle 4 to 5 dm. long, dichotomous; 

 the lower ascending branches •"> dm. long: bracts ovate-lanceolate, acum- 

 inate, puberulent, 1 cm. or less long: ultimate pedicels 0.5 to 1 cm. 

 long: calyx puberulent, campanulate, in anthesis 5 to G mm., in fruit 

 1 cm. long, strongly 13— nerved, slightly bilabiate ; the deltoid acuminate 

 lobes one-half as long as the tube: corolla 2 to 2.25 cm. long; tin- tube 

 constricted below, tubular and slightly enlarged upward; the blunt lobes 

 only 3 or 4 mm. long: styles and anthers exserted, glabrous : nut 

 oblong-obovate. — Jalisco, between San Sebastian and the summit of 

 Mt. Bufa de Mascota. alt. 1,850 in.. March 20, 1807 (J.\ W. Nelton, 

 no. 4108). A unique plant among the Mexican species, belonging 

 to a section hitherto known only from Brazil and adjacent South 

 America. 



Lycium geniculatum. Branches slender, geniculate, covered with 

 pale gray bark: spines slender, on the flowering branches about <s mm. 

 long, barely 1 cm. apart: leaves very glaucous, glabrous, oblong to 

 obovate, blunt or acute, 2.5 cm. long or less, on slender petioles 1 cm. or 

 less in length : flowers abundant in small cymes, terminating the rather 

 crowded short ultimate branchlets : pedicels 7 to 9 mm. long: calyx 

 glabrous, short campanulate, 2 mm. high, slightly broader, with ."> spread- 

 ing lance-subulate teeth 1 to 1.5 mm. long: corolla 1.2 cm. Ion-, funnel- 

 form, with broad-cordate lobes 4 to 5 mm. long, pubescent within the 

 tube: stamens slightly unequal, a little exserted : filaments pubescent 

 below: fruit 5 to 8mm. in diameter, red withabloom.— Pdebla, near 

 Tehuacan, Nov. 27, 1895 {C. G. Pn, /; ,l<>. no. 7000). Nearest relate, 1, 

 apparently, to L. cestmidrs, Schl., of Brazil. 



Margaranthua sulphureus. Annual, glabrous ; stem stout and 

 rather fleshy, 4 dm. high, branching above: lower leaves alternate, the 

 upper and those of the branches geminate and unequal, from ovate to 

 broadly rhombic-obovate, subentire or shallowly and bluntly sinuate, the 

 larger 3 to 6 cm. long, 3 or 4 cm. wide, narrowed below to winged pe- 



DO' 



tioles varying from 1 to 4 cm. long; upper leaves smaller, sometimes 

 subsessile: flowers generallv single from each of the upper axils ; pe- 



