23 



hills, A. Zionis and remulcus of the Grand Canon region, and the 

 small A. tephrodes of central New Mexico plains, and slopes. All 

 these are either of the Lower Temperate life zone or reach a little 

 up into the Middle. We now have a peculiar group of the Navajo 

 Basin with cellular pods. A. pygmaeus and Musiniensis, in the Lower 

 Temperate life zone. Then we have a group with pick-shaped hairs. 

 A. cymboides and Missouriensis have rather small pods, the one 

 belongs in the clay lands of the Navajo Basin, the other on th« 

 Plains from Montana to New Mexico. A. amphioxys is the third mem- 

 ber of this group and has variously elongated and arched pods and 

 belongs on the Colorado drainage and adjacent parts of the Rio 

 Grande. The Group with woolly pubescence shows a tendency to 

 Inflation of pod but never very great. Of this A. Newberryi and Eu- 

 rckensis have hairy pods and belong in the Great Basin region though 

 the first extends to the Mogollons and both in the Lower Temperate. 

 Forms with woolly leaves and pods are A. coccineus and funereus of 

 the Death Valley region, A. Utahcnsis of the Great Basin in general 

 and A. inflexus of the Columbia Basin. A species with very shortly 

 woolly pods and hairy leaves is A. Purshii of both Basins. 



20. Succumbentes. This group with so many characters of the 

 Hamosi as to the pods still is related to the Malaci on the one hand 

 .•i.nd the Galegiformes on the other. The flowers are those of the 

 latter and the leaves and habit and even the pods more like the Ma- 

 laci. But at best the relationship is remote, even to any known 

 species. For the present I merge this in the Malaci. 



21. Malaci. This group separates from the Argophylli early at 

 A. cibarius. A. Parryi and Feensis v.'ith capitate flowers come first 

 and belong to the Colorado foothills and New Mexical plains re- 

 spectively. A. ensiformis, malacus and Layneae follow. The first 

 species belongs on the high plateau south of St. George Utah; A. 

 malacus along the eastern base of the Sierras and over to the 

 Snake river on the Columbia drainage; A. Layneae from the south- 

 ern Sierras to the Grand Canon. The whole group belongs in the 

 Lower Temperate life zone, in and near the pinon and juniper mesas. 



22. Mollissimi. This group, the highest differentiation of the 

 Argophylli is compact and mostly Mexican. Species with smooth 

 pods are A. mollissimus and giganteus of the Colorado and Texan 

 to Arizona plains and mesas. Forms with stiff-hairy or shaggy pods 

 are A. Bigelovii and Phoenicis of the New Mexican and Mogollon 

 mesas, and a variety extending to central Utah. The form with 

 felted pods is A. Humboldtii of the high valleys of Mexico. Forms 

 with inflated pots are A. Orizabae of central Mexico, A. orthanthus 

 of Coahuila, and A. anisus of Pueblo Colorado. Apparently all the 

 species belong to the Lower Temperate life zone in well drained regions 

 with little alkali. 



23. Sarcocarpi. This branch of the Malaci starts off early also, 

 apparently near A. Parryi, whose closest relatives are A. Tennesse- 



■ ensis and Plattensis; the one from the southern prairies from Iowa 

 to Tennessee, the other from Indiana to Colorado and Texas on phiins 

 and prairies. The species with plum-shaped and very fleshy pods are 

 A. crassicarpus and Mexicanus of the Plains and prairies from Mon- 

 tana eastward and southenstward to Texas. 



24. The natural alteration of the Flexuosi Is the Ocreati into 

 which it passes at the start by the modification of the walls of the 

 pods In grooves and ribs, but without intrusion of the suture notice- 

 iibly. This group, like the Bisulcati has the flowers mostly with a 

 strong and snake-like odor and inhabits the Navajo Basin resion. 

 The species with pick-shaped hairs are A. sophoroides and conferti- 

 florus, the latter growing also in the Green River Basin of Wyo- 

 ming. The species with normal hairs are A. argillosus of the Green 

 River region in Utah, find A. Moencoppensis of the IJttle Colorado 

 region, the former growing on the hot bare mesas, and the latter in 

 the pine forests of the Mogollons. 



