566 PROCEEDINGS OF THE AMERICAN ACADEMY. 
nerves: calyx sparingly pubescent or glabrate, salverform, with shorter 
broader lobes. — Pursua, near Metlaltoyuca, alt. 250 m., Jan, 31, 1898 
(4. A. Goldman, no. 48). . 
H. (Hypenia § Laxiflorae) Nelsonii. Tall, stem smooth and 
glossy below, minutely puberulent 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 tu 
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 (Z. 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 geniculatum. 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 
obovate, blunt or acute, 2.5 em. 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 4 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 
tube: stamens slightly unequal, a little exserted; filaments pubescent 
below: fruit 5 to 8mm. in diameter, red with a bloom. — PuEBLA, eat 
Tehuacan, Nov. 27, 1895 (0. G. Pringle, no. 7000). Nearest related, 
apparently, to Z. 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 be: 
broadly rhombic-obovate, subentire or shallowly and bluntly sinuate, te 
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; P& - 
