366 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VOL. 13, No. 16 
Type in the U. 8. National Herbarium, no. 1,152,451, taken from a plant 
cultivated in San Salvador, Salvador, January, 1923, by Dr. Salvador 
Calderén (no. 1463). 
The vernacular name is magueyén. 
Peperomia izalcoana Trelease, sp. nov. 
A glabrous subrhizomatous herb; stem slender (2 mm.), scarcely 30 em. 
high; leaves alternate, round- or subdeltoid-ovate, blunt or subacute, round- 
based, moderate or rather small (2-4.5 em. long), 5 or 7-nerved; petiole 
rather short (scarcely 3 em.); spikes terminal and opposite the leaves, 40-100 
mm. long, loosely flowered; peduncle, depending on the spike length, 1-3 cm. 
long; bracts round-peltate; berries ellipsoid, essentially sessile; style short but 
evident; stigma apical. 
Type in the herbarium of the University of Lllinois, collected at Izalco, 
Salvador, on wet bank, March 19, 1922, by Paul C. Standley (no. 21874). 
Peperomia matapalo Trelease, sp. nov. 
A villous assurgent herb; leaves alternate or the uppermost congested into a 
whorl of 2 or 3, elliptic-oblanceolate or the lower reduced and obovate, rather 
small (1.5-2 cm. wide, 3—4.5 em. long), obtuse or bluntly acuminate, cuneate, 
5-nerved, appressed-villous on both faces; petiole short (5 mm.); spikes ter- 
minal, 2 mm. thick, 50-70 mm. long, rather closely flowered; peduncle 10-15 
mm. long; bracts round-peltate; ovary subglobose ; stigma obliquely anterior. 
Type in the herbarium of the University of Illinois, collected at San Sal- 
vador, Salvador by Dr. Salvador Calderén (no, 1121). 
The common name js matapalo. 
Peperomia standleyi Trelease, sp. nov. 
A delicate fleshy glabrous herb, creeping over tree branches; stem filiform; 
leaves commonly 4-6 at a node, elliptic-obovate, acute-based, minute (5-7 
mm. wide, 8-10 mm. long), 1 or obscurely 3-nerved, impressed-punctulate ; 
petiole 2-3 mm. long; spikes terminal, scarcely 2 mm. thick and 15 mm. long, 
rather loosely flowered; peduncle about 10 mm. long; bracts round-peltate; 
ovary ovoid, submucronulate; stigma apical. 
Type in the herbarium of the University of Illinois, collected at Tonacate- 
peque, Departamento de San Salvador, Salvador, December 30, 1921 by 
Paul C. Standley (no. 19426). 
Piper patulum cordifolium Trelease, var. nov. 
A shrub 2-3 m. tall, glabrous except that the leaves are more or less 
puberulent on the nerves beneath; leaves broadly ovate, acuminate, deeply 
cordate with rather narrow sinus, moderately large (10-16 em. wide, 15-23 
em. long); spikes in fruit 4 mm. thick and 130 mm. long; berries oblong- 
truncate, glabrous. 
Type in the herbarium of the University of Illinois, collected at Nahulingo, 
Departamento de Sonsonate, Salvador, March 21, 1922, by Paul C. Standley 
(no. 22046). 
Piper standleyi Trelease, sp. nov. 
A shrub 1—1.5 m. tall; twigs slender, for a time conspicuously subhirsute; 
leaves membranous, lance-oblong, long-acuminate, inequilaterally cordulate, 
rather small (1.5-2.5 em. wide, 5-9 em. long), subpalmately 5-nerved, hirsute 
