6 BULLETINS OF THE BUREAU OF PLANT INDUSTRY. 



Bulletin No. 178. — Improvement oi the Wheat Crop in California— 

 Continued. 



Requirements for the production of profitable crops — Continued. 

 Development of better varieties of wheat— Continued. 



Selecting varieties for California — Continued. Page. 



Habit of growth 21 



Nonshattering habit - 21 



Milling quality 22 



Other requisites 22 



Seed improvement by the grower 23 



Small compared with large seed 23 



The seed plat - 23 



Two new varieties of wheal adapted to California conditions 24 



The Chul variety 24 



Origin and history 24 



Introduction into California 25 



Description 25 



Yields obtained 25 



Milling quality 20 



The Fretes variety 2(1 



Origin and history _'<'> 



Description 27 



Yields obtained ' 27 



Milling quality 28 



Pure seed of the Chul and Fretes varieties 29 



Protein content as affected by time of seeding 21) 



Summary 30 



Index 33 



Bulletin No. 179. — The Florida Velvet Bean ami Related Plants. 



Introduction 7 



General character of the genus Stizolobium 9 



Analytical key to the species 10 



Stizolobium deeringianum 11 



Stizolobium capita turn 12 



Stizolobium utile 14 



Stizolobium cinereum : 15 



Stizolobium niveum i 15 



Stizolobium hassjoo 17 



Stizolobium aterrimum 18 



Stizolobium pachylobium . 19 



Stizolobium velutinum 20 



Index 23 



Bulletin No. ISO. — Agricultural and Botanical Explorations in Pales- 

 tine. 



Introduction 7 



Analogy between Palestine and California 8 



General conformation of Palestine S 



Climate and rainfall of Palestine i 8 



Geological formations of Palestine 10 



Vegetation of Palestine 11 



Economic plants worthy of introduction into the United States 13 



Plants recommended as stocks 13 



Zizyphus spina-christi (Christ-thorn) 13 



Zizyphus spina-christi biennis 13 



