449 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Ranae: Rio Grande Valley about El Paso and southward, in the Lower Sonoran 
Zone. 
This is probably to be found in southern New Mexico, although we have seen no 
specimens, IJtis very common on the mesas about El Paso. 
6. Opuntia clavata Engelm. in Wisliz. Mem. North, Mex. 95. 1848. 
Type Locauity: About Albuquerque, New Mexico. Type collected by Wislizenus. 
Rance: New Mexico. 
New Mexico: Santa Fe; El Rito; Las Vegas; Carrizozo; Stanley; Tesuque; Socorro; 
Albuquerque; Laguna; Los Lunas; Cubero, Dry plains, in the Upper Sonoran Zone. 
A common plant on the high mesas and plains of the central and northern parts of 
the State. It is rarely over 10 cm. high and forms irregular beds sometimes 1 or 2 
meters across, 
7. Opuntia whipplei Engelm. & Bigel. Proc. Amer. Acad. 3: 307. 1856. 
Opuntia whipplei laevior Engelm. & Bigel. loc. cit. 
Type Locauty: ‘‘From Zufii westward to Williams River,’’ Arizona or New Mexico. 
Ranae: Western New Mexico to Arizona. 
New Mexico: Gallup; Aztec; Puertecito; south of Ojo Caliente; Farmington; Cedar 
Hill. Upper Sonoran Zone. 
This is a characteristic low, cylindric-stemmed plant, reaching a height of 60 cm. 
in western New Mexico in the region about Zuni. It often forms dense beds 1 meter 
or more in diameter. The New Mexican plant, so far as we know, is always of this 
form and size, and has yellow flowers. Farther west, in Arizona, it becomes much 
larger and often has purple flowers. 
The species is most like the next, Opuntia davisii, which is fairly common in the 
eastern part of the State, on plains south and east of Portales. Both are low and very 
spiny and have medium-sized yellow flowers and tuberculate fruit. Opuntia davisii 
is stouter, with shorter joints and more numerous spines. The two are most easily 
distinguished by the sheaths of the spines. Opuntia whipplei always looks whitish 
or very pale yellow, while Opuntia davisii is a golden brown, these colors being due 
to the sheaths. 
8. Opuntia davisii Engelm. & Bigel. Proc. Amer. Acad. 3: 305. 1856. 
Tyre Locality: On the Llano Estacado, near the upper Canadian River, New 
Mexico or Texas. 
RanGe: Eastern New Mexico and western Texas. 
New Mexico: Red Lake (Wooton), Sandy plains, in the Upper Sonoran Zone. 
9. Opuntia leptocaulis DC. Mém. Mus. Hist. Nat. 1'7: 118. 1829. 
Type Locauity: Mexico. 
Range: Southern New Mexico and Arizona to western Texas, south into Mexico. 
New Mexico: Mesa near Agricultural College; ten miles east of Hillsboro; Oro- 
grande; Guadalupe Mountains; Kingston; Upper Corner Monument; Tularosa; Socorro; 
Hachita. Lower Sonoran Zone. 
The slender-stemmed species of Opuntia of this type usually pass under the name 
of “‘tasajilla” among the Mexicans, although this species is also called ‘‘garrambullo,” 
a name applied to almost any shrub with red berries. 
10. Opuntia kleiniae DC. Mém. Mus. Hist. Nat. 17: 118. 1829. 
Opuntia wrightti Engelm. Proc. Amer. Acad. 3: 308. 1856. 
Type Locality: Mexico. 
Rance: Western Texas and southern New Mexico to Mexico. 
New Mexico: Low hills west of San Antonio; mesa near Agricultural College. 
Lower Sonoran Zone. 
The specimens here listed are referred to the above species tentatively and with 
considerable doubt. They agree in most of their characters with the description of 
Opuntia wrightii, but the flowers are a dull purple, more or less streaked with green. 
