12 The Delta of the Rio Colorado. 
Diplachne imbricata (Thurb). 
Along the banks of the river and streamways. 
Distichlis spicata (L.) Greene. Salt grass. 
Forming carpet with Cressa in southern part of the delta, in which 
the soil is saline. 
Echinochloa Crus-galli (L.). 
Low ground near bayous and wet places. The seeds of this grass 
are probably to be included among those used for food. 
Eclipta alba (L.). Hook. 
Along the banks of the Rio Colorado near the margin of the 
stream. 
Lippia cuneifolia (Torr.). Skud. 
Exposed banks and bare places near the river. 
Phragmites Phragmites. Cane, Carrizo, Tule. 
Along the margins of streams, forming dense brakes. Used for 
making huts, flutes, and also in the construction of various articles. 
Pluchea sericea (Nutt.). Coville. Arrow-weed. 
In dense copses, forming pure cultures on banks above ordinary 
flood-level. Used by Cucopa Indians to form the shafts of arrows, to 
make the wattling and roofing of huts, for weaving coarse baskets, 
and granaries, etc. 
Populus. 
The young shoots are used, with willows, for wattling and por- 
tions of trunks for construction of huts. 
Prosopis pubescens. Tornillo. Screw-bean. ® 
Wood used in the same manner as the mesquite. 
Prosopis velutinea. Mesquite. 
The wood of the trunks is used for construction of all kinds, for 
making fires, and for tipping the points of arrows. The beans are 
collected and used for food. 
Rumex sp. Dock. 
Moist soil in open spaces. 
Salix. Willow. 
Two species are abundant throughout the delta, and these furnish 
material for use in huts, for the making of small hunting bows, and 
for miscellaneous purposes. 
Scirpus fluviatilis A. Gray. 
Mud flats throughout the delta. 
Scirpus Californicus (C. A. Meyer). Britton. 
Margins of streams. 
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