MIMOSACEAE 



*De smodi um bachtooaul is resembles somewhat D. cin e rase e ns but 

 the stems arc lees erect and more branches and the entire plant is 

 more fragile in general appearance. It has rather soft, slightly- 

 hairy, trifoliate leaves which arc only slightly reticulately veined. 

 The lomonts of the pods are much smaller than those of D. c in eras c ons . 

 This plant is abundant in United areas in the mountains of extreme 

 southwestern Tew Mexico and it doubtless occurs in southern Arizona 

 as well. The root system and the semi-prostrate habit of' this plant 

 make it much more desirable for an erosion control plant then the 

 D. cinora scons. It is also probably much bettor forage. 



* De smodium grahami is a perennial vine or semi-prostrate herb 

 or vine with trifoliate leaves, the leaflets of which are ovate. 

 The ]. omenta of the pods are quite large. The prostrate habit and 

 divided woody root system make it an excellent erosion control plant. 

 It is, however, relatively rare in the southwest. It occurs in the 

 vicinity of Prescott and doubtless throughout the Mogollon region 

 of Arizona and adjacent Hew Mexico. Ho data is available on its 

 palatability but it is probably relatively good. 



Desmodiu m angustif olium is a very rare and handsome tick 

 trefoil from Santa Cruz County in Arizona. The leaves are simple 

 and very long and narrow, the blades being often as long as five 

 inches. The Desmodium arc: commonly thrce-f ol iatc. The plant has 

 an excellent root system and should make a good erosion control and 

 forage plant. It is extremely rare, however, and has never been 

 grown in the nurseries. 



Desmoid urn b igelovi i and D. rosoi arc annuals, possibly of no 

 significance. These plants are confined to the southern part of 

 New Mexico and adjacent Arizona. It may prove interesting and 

 profitable to try these in observational work as annual ground cover 

 legumes . 



*Prosopis glandulosa. This He s quite is much smaller than 

 Z*. HiAAHJeaHEL* ~ ^ n fact it is commonly a low shrub froquontly half 

 covered by sand. Vast areas in southern New Mexico and adjacent 

 Texas are covered with low clumps of this me s quite and with sand 

 dunes. The Question naturally arises in one's mind what would 

 happen if the mosquito were not there. It is certain the sand dune 

 condition is caused primarily by overgrazing. It may be that the 

 mosquito s in the dunes aggravate the movement of the sand by divert- 

 ing the wind into channels. 



These sand duties offer an excellent opportunity for a study 

 of grasses suitable to these sites. Setaria macros taohya, Stipa 

 eminons .and exotics such as Elymus sabul osus and Aristida pinna ta 



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