8 BULLETIN 1031, U. S. DEPARTMENT OF AGRICULTURE. 
The vegetation is more or less grouped into types. Figure 1 shows 
the vegetation classified into these range types for the plains of the 
reserve. Table 1 gives the acreage of each type by pastures of the 
reserve. 
TABLE 1.—Acreage by types and pastures of the plains area of the Jornada Range 
Reserve.* 
G Snak fe itel S Mizeat bree 
rama-| Snake- |Mesquite age- r fixe rush— 
Pasture. grass. | weed. |sandhill.| brush. Weed Swag grass. | creosote Total. 
| bush. 
Pe cmc ceeicls clomieisintee Acres. | Acres. | Acres. | Acres. | Acres. | Acres. | Acres. | Acres. | Acres. 
Dee liar tk AS te 3, 416 1,438 | 31,730 8 894 5,393 | 25,472 26, 363 74, 714 
Sie a SIS Ne tit 14, 473 4, 834 5, 922 423 721 Telarc BILE | oe 34, 545 
yeaa clacteineee sees 541 963 486 50 82 168 21120) ee eee 2,410 
eee thin eileen st soe 1407). = === (Aa seBseeeee 461 286 DAOT he See 2,815 
Bee cone cisisia niacin O99 || Secs s cicias| Swiss aascell ne cme nice tec ee ae | Some elas 3 408 509 1,450 
OR eecemciibaiteers SVD eee ee ae A Saas 33 | 21,255 2,427 4,030 
LO Sees Beer ae Seal eos rasal | pee ecco sAaOeG SoBe He SoS 138 3 401 245 
TET ROO seta wl ono ser 4, 292 260" Erne ee es | CESS ee See | eee CSS BU saci 1 4, 805 
11D ee Ue Tea TAG | ooee ce RCS e SN. Eee ke cee eee ee 68 352] 6,183 7,049 
TSS Seen ta et ge ip GBis) WGoacocaoe Wososdcedbasscscee 45 398 | 32,401 | 12,619 17,001 
TOG alese eee 27, 351 7,495 | 38,212 481 2, 203 8,142) 17,373 | 48,346 | 149, 603 
1 Pasture No. 11 is not included. This is an area of approximately 52,317 acres of mixed grasses and 
browse types in the San Andres Mountains. 
2 Mixed-grass ty pein this pasture mainly grama, three-awn, and drop-seed grasses. 
3 Mixed-grass type in this pasture mainly burro, tobosa, and salt grasses. 
Because of the time of the year during which the forage in the 
various types is palatable to cattle and the growth habits of the 
main forage species, the several types are divided into yearlong or 
winter range, and summer range. The grama-grass type, mixed 
grama, three-awn, and dropseed-grass type, snakeweed type, and 
mesquite-sandhill type constitute the yearlong or winter range, and 
the swag type, mixed tobosa, burro, and salt-grass type, and black- 
brush-creosote bush type make up the summer range. 
YEARLONG OR WINTER-RANGE TYPES. 
The grama-grass type (PI. I, fig. 1) is the most important of the 
several yearlong or winter-range types. Black grama grass is the 
predominating plant species in this type, but other grasses, such as 
three-awn and dropseed occur to some extent. Soapweed ° is the most 
conspicuous species next to the grama grass and is nearly always 
found in this type. Occasionally three-awn and dropseed grasses are 
more abundant than the grama grass, and in such cases form a mixed- 
—— 
Footnote continued from page 5: 
Annual weeds— 
Boerhaavia=Boerhaavia torreyana. 
Mouse ear=Tidestromia lanuginosa. 
Hriogonum—LHriogonum spp. 
Glandleaf=FPectis angustifolia. 
Caltrops=Tribulus terrestris. 
Six-weeks grasses— 
Aristida bromoides, Bouteloua aristidoides, B. barbata, B. parryi. 
6 Soapweed= Yucca elata. 
