HYDROFHYLLAC EAE 



frooly from the roots and the caudiccs. For this reason it is an 

 excellent soil binder. It is probably browsed to some oxtent, par- 

 ticularly by shocp and goats. The leaves contain a balsam-like 

 resin which is not unpleasant to the taste. The balsam has been 

 utilized for cough preparations. The dried leaves are official in 

 the U. S, Pharmacopoeia. 



BORAGINACEAE 



Coldenia c anos cons is a low spreading suf f rutescent perennial 

 common to the hottest, driest sections of the southwest, from Texas 

 to California. It doubtless has so-ie value as a soil binder but as 

 it never makes a complete ground cover and as it is valueless as 

 forage, its only plo.ee is to excite the curiosity of the traveler. 



Coldenia greggii is a shrub with small gray ovate hairy leaves 

 and white flowers. It is very common on some of the dry limestone 

 hills of western Texas and southern New Mexico. Its value for for- 

 age is not known and its value a-s. an erosion control plant is slight. 

 It should make a hardy ornamental for rock gardens. 



Col denia hispidissima is a common sight in the White Sands 

 region, the sandy deserts of Central and Northern Arizona and those 

 of southern Utah. It is a true shrub but the steins are almost al- 

 ways buried in sand and only the ends of the branches with their 

 small hispid leaves arc visible'. This plant has a marked value as 

 a soil binder and should be suitable for propagation on sand dunes 

 and in reel: gardens. 



Euploca c o n v o 1 vu 1 a c e a e is an annual confined to the sand dunes 

 or very sandy land from Nebraska to Arizona. It is a creeping vine 

 with rather small, ovate-lanceolate leaves covered with long, stiff 

 appressed hairs, giving the leaves a grayish appearance. This plant 

 grows in profusion and in spite of being an annual is an effective 

 sand binder. It is valueless as forage but should make a beautiful 

 ornamental . 



VERBENACEAE 



Lippia wrightii is a common shrub in the foothills of the 

 southwest from, we stern Texas to southern California and south into 

 Ilexico. It is a mint with small crenate leaves and a very pleasant 

 odor. The white flowers are in short spikes. These have an even 

 more delicate perfume-like odor than the loaves. The bush is of 

 some value for forage and grows sufficiently abundant in many places 

 on stoop slopes to be of value for erosion control. The plant should 

 be used more extensively as a garden shrub because of its flowers 

 and its delightful odor. 



-125- 



