50 UNITED STATES AND MEXICAN BOUNDARY. 
PHASEOLUS ANGUSTISSIMUS, Gray, Pl. Wright. 2, p. 33. Dry ravines on the Cibolo, a tributary 
”of the Rio Grande, Cohahuila, July ; Bigelow. 
PHASEOLUS, MACROPOIDES, Gray, 1. c. Hills at the Copper Mines, August; Bigelow. . 
PHASEOLUS ATROPURPUREUS (n. sp.:) caulibus volubilibus retrorsim pubescentibus ; stipulis minutis 
subulatis; foliolis lanceolatis basi dilatatis utrinque pubescentibus lateralibus ad basim unilobatis, 
terminati trilobo ; pedunculis folio multoties longioribus paucifloris ; calycibus subsessilibus, 
laciniis inferioribus lanceolato-subulatis, superioribus triangulari-lanceolatis, alis corolle late 
ovatis (atropurpureis) vexillo duplo longioribus; leguminibus deflexis lineari-falcatis 7 一 9- 
spermis, Rocks on the Rio Cibolo of the Rio Grande, and ravines, Bufitillo ; Bigelow. Presidio 
del Norte, July—August; Parry. Leaflets 14—24 inches long, tapering to a long narrow 
point; the lateral ones with large acute lobe on the outer side at the base; the terminal leaf 
more or less dilated at the base, and usually 3-lobed, but sometimes (especially in the lower 
leaves) only obscurely lobed.  Peduncle 8—12 inches long, and still more elongated in fruit. 
Flowers 6—10, at first approximated toward the extremity of the peduncle, but afterwards 
distant. Pods about 3 inches long and 2 lines wide. Seeds oblong, compressed, about 24 lines 
long, and 1j wide; smooth, greyish, speckled with dark purple. This seems to be quite distinct 
from any Phaseolus hitherto described. Mr. Schott found on the sea beach at Brazos Santiago, 
Texas, a plant allied to this, but much more downy, and the leaflets half as large, ovate, 
obtuse, with very short lobes, 'ТҺе specimens are not sufficiently complete for a more minute 
comparison. 
VIGNA VILLOSA, Savi. ? DC. Prodr. 1. 2, p. 40. Thickets on the Rio Grande, between Ringgold 
Barracks and Laredo ; Schott. If, as is probable, this and V. glabra are not specifically distinct, 
it ought to be called V. luteola, the genus Vigna having been founded on Dolichos luteolus, 
Jacq. 
ERYTHRINA CORALLOIDES, Мос. Ё Sesse in DC. Prodr. 2, р. 413? Gray, Pl. Thurb. p. 301. 
Bachuachi and Gaudaloupe cafion, June (in flower) and August (in fruit); Thurber. Summit 
of mountains north of Imores; Capt. E. K. Smith ; and Sierra del Pajarito, in the same State ; 
Schott. I have followed Dr. Gray in naming this plant, but it does not well accord with the 
description of De Candolle. The leaves are broader than long, and the petioles in our specimens 
are more or less prickly. Indeed, it scarcely differs from E. herbacea, of the southern States, 
for that species becomes shrubby in Florida, and the stem, as well as the petioles, prickly. 
БнүхсновгА TEXANA, Torr. 人 Gray, Fl. 1, p. 687. Western Texas; also near the Copper 
Mines and Sonora, May—June. 
БнүхсновтА TEXANA, var. ANGUSTIFOLIA, Gray, Pl. Wright. 1, p. i Mountain ravines» 
between Van Horn’s Wells and Muerte, July ; Parry, Bigelow. 
RHYNCHOSIA MENISPERMOIDEA, DC. Prodr. 2, p. 384. Sandy places, low land, Texas, June; 
T'hurber, Bigelow. 
CENTRO&EMA VIRGINIANA, Benth. ; Torr. & Gray, Fl. 1, p. 290. Var. foliolis minoribus angus” 
tioribusque. Brazos Santiago, May ; Schott. 
GALACTIA MARGINALIS, Benth.; Torr. Ё Gray, Fl. 1, p. 288. Western Texas, near the Rio 
Grande; Parry. 
—  GaLacriA TEPHRODES, H. B. Kth.; Gray, 5 Wright. 2, р. 34. Ван near Rock creek; 
. Bigelow. Janos, Chihuahua; 7 ааа 
GALACTIA CANESCENS, Benth. ; Torr. Ё Gray, Fl. 1, p. 288. Sandy pu between Ringgold 
Barracks and- 2: Техав: ‘Schott. 
