140 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
smaller, usually entire, more pubescent leaflets, much shorter peduncles, glabrate 
pods, and a long, slender style. 
Phaseolus metcalfei Wooton & Standley, nom. nov. 
Phaseolus retusus Benth. Pl. Hartw. 11. 1839, not Moench. 
We have assigned the specific name in honor of Mr. J. K. Metcalfe, late of 
Mangas Springs, New Mexico. Mr. Metcalfe was the first to introduce this 
plant into cultivation, and it has been popularly known as the Metcalfe bean. 
It has proved of some value as a forage plant in the Southwest and has been 
treated of in some of thie Department of Agriculture publications under this 
name. 
Phaseolus tenuifolius (A. Gray) Wooton & Standley. 
Phaseolus acutifolius tenwifolius A. Gray, Pl. Wright. 2: 83. 1853. 
In P. acutifolius the leaflets are triangular-lanceolate or ovate, not much 
longer than the peduncles, while in P. tenuifolius they are elongated-linear to 
linear-oblong, and about twice as long as the peduncles. The latter, too, is 
usually a much larger, taller plant. 
Psoralea megalantha Wooton & Standley, sp. nov. 
A low perennial, 10 cm. high or less; stems very short; petioles equaling or 
twice as long as the leaflets, sericeous, also with a few spreading hairs; leaflets 
usually 6, obovate, 27 mm. long or less, cuneate at the base, rounded at the 
apex, densely sericeous beneath, sparingly sericeous above, dull green; peduncles 
stout, 20 mm. long or shorter, sericeous; bracts lanceolate or lance‘ovate, 11 mm. 
long or less, acute or somewhat acuminate, present only at the base of the in- 
florescence; flowers rather few, nearly capitate, on pedicels 8 mm. long; calyy 
about 18 mm. long, hirsute, the lobes nearly equal, linear, acute, equaling or 
shorter than the tube; corolla 20 mm. long. 
Type in the U. 8. National Herbarium, no. 368979, collected at Aztec, May 18, 
1899, by C. F. Baker (no. 440). 
''The collection was distributed as P. mephitica S. Wats. and it is related 
to that species. The flowers, however, are twice as large in our plant, the 
intlorescence subcapitate instead of elongated, and the pubescence mostly ap- 
pressed instead of spreading or retrorse. 
Robinia rusbyi Wooton & Standley, sp. nov. 
Shrub with stout, nearly glabrous, reddish brown branches; spines stout, 
straight, 15 mm. long or less; rachis of the leayes slender, minutely puberulent 
or glabrate; leaflets oval or broadly oblong, rounded and mucronate at the apex, 
rounded or slightly narrowed at the base, grayish green, glabrous above, minutely 
strigillose beneath; racemes many-flowered, short-peduncled, pubescent ; pedicels 
stout, densely glandular-pubescent; corolla 20 mm. long or more; calyx lobes 
ovate, acute; pods 45 to 85 mm. long, 18 mm. broad or less, glabrous, purplish. 
Type in the U. S. National Herbarium, no. 690288, collected on the Mogollon 
Road 15 miles east of Mogollon, August 8, 1900, by IE. O. Wooton. 
ADDITIONAL SPECIMENS EXAMINED: Eagle Peak, August 2, 1900, Wooton; Burro 
Mountains, alt. 2,250 meters, 1903, Metcalfe 189; Deep Creek, August 9, 1900, 
Wooton; head of Carrizo Creek, Mescalero Reservation, alt. 2,220 meters, 1903, 
Plummer. 
The last specimen cited may not belong here, for the leaflets are narrower, 
longer, and acute. It certainly is not Robinia neomexicana. R. rusbyi dif- 
fers from that species conspicuously in its glabrous fruit and merely glandular- 
pubescent peduncles and pedicels. 
