188 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
The following additional specimens are in the National Herbarium: 
Texas: El Paso, Jones 4218, Stearns 77; in 1881, Vasey. Del Rio, June 13, 
1891, Dewey. Went, Tracy é Harle 411. Mouth of Pecos River, Bailey 
269. Boquillas, Bailey 356, 
New Mexico: Tortugas Mountain, Standley 6446. Mesa west of Organ 
Mountains, Wooton 129; June 138, 1906, Standley; August 19, 1906, 
Wooton & Standley. La Luz Canyon, August 27, 1901, Wooton. Lake 
Valley, 1914, Jirs, Ida M. Beals. North of Emory Peak, Mearns 305. 
Without locality, Vasey 180. Big Hatchet Mountains, Goldman 1842. 
Eddy, Bailey 142, 
Arizona: Near Fort Huachuca, Wilcox 415, 181. Huachuca Plains, Lem- 
mon 156. San Bernardino Ranch, Mearns 711. 
CHIHUAHUA: Near Chihuahua, Palener 116; Rose & Hough 4216; Pringle 
370. Sabina, Rose € Hay 5264. Between Casas Grandes and Sabinal, 
Nelson 6370. 
ZACATECAS: Caflitas, Rose é Hay 5266. 
QuERETARO: Near Higuerillas, Rose, Painter &€ Rose 9762. Between Viza- 
rr6n and Higuerillas, Altamirano 1696. 
Part of the material distributed as Wright 1050 and Mevican Boundary Sur- 
vey 327 also belongs to this species. 
The material here segregated as Acacia vernicosa has always been referred 
to A. constricta Benth. The two species are closely related and do not have 
separate ranges, but at the same time they seem to be clearly distinct. In A. 
constricia the pinnae are 4 to 9 pairs, the leaves are usually pubescent, and 
the leaflets are almost twice as large and very slightly or not at all viscid. 
Jentham evidently had both plants before him when the description of A. con- 
stricta was written, for he states* that the leaves of the sterile branches are 
more luxuriant, puberulent, with 4 to 6 pairs of pinnae, while those of the flower- 
ing branches are glabrous, with usually 2 pairs of pinnae. The writer is unable 
to find any indication that the difference in number of pinnae may be explained 
in this way. All the numerous specimens examined are clearly of one form 
or the other, and the two species are found associated on only one sheet, con- 
sisting of specimens collected by Wright (no. 1050). In this case, and in view 
of the method by which Wright’s collections were distributed, it seems not im- 
probable that the two plants came from widely separated localities, 
Because of the fact that Bentham’s description was based upon material of 
both species, there is naturally some question as to which should be taken as 
the type. The writer has arbitrarily chosen for that purpose the form with 
numerous pinnae, which has a rather wider distribution than A. vernicosa. 
The specimen of the type collection (Wright 162) in the National Herbarium 
consists of a single fruiting branch of this form. 
Calliandra conzattii Standl., sp. nov. 
Branches slender, grayish; petioles 6 to 12 mm. long; pinnae a single pair, 
the rachis slender, 2 to 4 cm. long, densely hirtellous; leaflets 5 or 7, ovate, 
elliptic, or elliptic-oblong, 2.2 to 6.2 cm. long, 1 to 2.5 ecm. wide, the lower ones 
much smaller than the upper, rounded or very obtuse at the oblique base, 
usually acute but sometimes obtuse at the apex, subchartaceous, bright green, 
puberulent or hirtellous on the costa, but elsewhere glabrous, the venation 
prominulous; flowers capitate, sessile, the heads sessile, solitary, the bracts 
puberulent; calyx 1 mm. long, campanulate, puberulent; corolla 4 to 5 mm. 
long, greenish, sparsely puberulent above, the lobes very short, ovate, obtuse; 
stamen tube short-exserted. 
*Pl. Wright. 1: 67. 1852. 
