62 i UNITED STATES AND MEXICAN BOUNDARY. 
ACACIA COULTERI, Benth. 1. с.; Gray, Pl. Wright. 2, р. 53. Eagle Pass and plains, and plains 
near Zoquete Creek ; Bigelow. 
ACACIA FLEXICAULIS, Benth.; Gray, l. c. 1, p. 65, adnot. Monterey, Neuvo Leon, &c.; Thurber. 
This is clearly the same as Gregg’s plant. 
Acacia CUSPIDATA, Schlecht. in Linnea, 12, p. 513; Gray, Pl. Wright. 1, p. 66. А. hirta, 
Nutt. in Torr. & Gray, Fl. 1, p. 404, А. Texensis, Torr. @ Gray, l. с. Plains and dry places 
along the Rio Grande, and in New Mexico; also іп Sonora; June—October. After a careful 
comparison of numerous specimens of the first and last species here quoted with an original 
specimen of A. Texensis, I unite the whole without hesitation. 
ACACIA CONSTRICTA, Benth. in Gray, Pl. Wright. 1, p. 66” Hills along the Rio Grande, from 
El Paso to the Presidio del Norte ; also near Tascata, and in Sonora; May—July. Sometimes 
the leaves have only 1 or 2 pairs of pinne; but such occur chiefly on very short branches or 
spurs. The leaves and young branches are strongly pubescent in specimens collected near the 
Presidio del Norte by Dr. Parry. 
AcAcrA: беноттп (n. sp.:) glabra; spinis stipularibus subulatis rectis; foliis fasciculatis 
unijugis ; foliolis 3—5-jugis filiformi-linearibus alternis ; legumine lineari complanato toruloso 
curvato, valvulis coriaceis. Near the Cañon of San Carlos, at the Comanche Crossing of the 
Rio Grande, September, (in truit); Parry. Branches flexuous terete. Petiole below the fork 
one-third of an inch long. Pinne an inch in length. Leaflets 2 lines long, and scarcely 4 of a 
jine wide, thick. Spines 2 一 3 lines long. Peduncles slightly bracteate in the middle. Stamens 
very numerous. Legume 2—3 inches long, and 4 of an inch wide, elevated on a short stipe, 
6—9-seeded, curved into a semi-circle, or even a nearly complete circle, This is a very distinct 
species, but seems to be allied to À. constricta. 
Acacta FARNESIANA, Willd. А. Cavenia. Hook. & Arn. Bot. Beechey, р. 21; Benth. Мітоз. 
in Hook. Lond. Jour. Bot. l. e. Common on the boundary from Texas to California. 
** ACACIA TORTUOSA, Willd. Sp. 4, p. 1083, Benth. Mimos. in Hook. Lond. Jour. Bot. 1, p. 392. 
A. albida. Lindl. Bot. Reg. t. 1317. УасһеШа Lindheimeri seu minor. Engelm. MS. in 
herb. Gray. Plains near Eagle Pass on the Rio Grande, and on hill sides, Santa Rosa, Chi- 
huahua ; Bigelow. "Tamaulipas ; Berlandier. In flower this species is readily mistaken for A, 
Farnesiana ; but Dr. Engelmann had distinguished it even in that state. Flowering specimens 
have been confounded with A. Cavenia, which is only A. Farnesiana. The present species 18 
well distinguished by its pod, which is elongated-linear, 3 to 5 inches long, narrow, nearly 
terete, moniliform, fleshy, and minutely tomentose; seeds uniserial, compressed, black. The 
corolla is longer than in A. Farnesiana. The heads and peduncles are nearly glabrous in our 
specimens.” —A. Gray. 
ACACIA? CRASSIFOLIUM, Gray, Pl. Thurb. р. 311. La Peña, Cohahuila ; Dr. Edwards, Thurber. 
PITHECOLOBIUM BREVIFOLIUM, Benth. in Gray, Pl. Wright. 1, p. 67. Rocky hills around the 
silver mines of Santa Rosa, Coahuila. January, (with fruit of the preceding season ;) Bigelow. 
ROSACEA. 
‘Prunus (Cerasus) VIRGINIANA, Linn. Sp. 1, р. 473. Dry ravines near vnl Baehe, New 
Mexico, and at the Copper Mines ; July; in fruit. | 
PRUNIN CAPoLLIN, DC. Prodr. 2, p. 539, (sub Ceraso;) Gray, Pl. Wright. 2, p. 544. Sides. 
of the Limpio mountain, Texas; Bigelow. Sierra del Pajaritos, &c., Sonora; Schott, Capt. E. — || 
K. Smith. 
