566 PROCEEDINGS OF THE AMERICAN ACADEMY, 



nerves : calyx sparingly pubescent or glabrate, salverform, with shorter 

 broader lobes. — Puebla, near Metlaltoyuca, alt. 250 m., Jan. 31, 1898 

 {E. A. Goldman, no. 48). 



H. (Hypenia § Laxiflorae) Nelsonii. Tall, stem smooth and 

 glossy below, minutely puberuleut above : leaves thick, glabrous, rather 

 glaucous, lance-acuminate, slightly auriculate-clasping at base, those of 

 the stem 1.5 to 2 dm. long, with fine short teeth along the margin, the 

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

 the lower ascending branches 3 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 6 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 ; the tube 

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

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

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

 Mt. Bufa de Mascota, alt. 1,850 m., March 20, 1897 {E. W. Nelson, 

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

 to a section hitherto known only from Brazil and adjacent South 

 America. 



Lycium genictilatum. Branches slender, geniculate, covered with 

 pale gray bark ; spines slender, on the flowering branches about 8 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 campaimlate, 2 mm. high, slightly broader, with 5 spread- 

 ing lance-subulate teeth 1 to 1.5 mm. long: corolla 1.2 cm. long, 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 8 mm. in diameter, red with a bloom. — Pdebla, near 

 Tehuacan, Nov. 27, 1895 (C. G. Pringle, no. 7000). Nearest related, 

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



Margaranthus 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- 

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

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



