Published online by Cambridge University Press: 12 June 2017
Crabgrass, Digitaria sanguinalis (L.) Scop., is one of the most troublesome annual turf weeds over much of the United States. In the sub-tropical climate of Southern California its life cycle appears to be quite different from that in most of the United States. To the author's knowledge, its behavior in such a climate has not been described. Studies of its natural development here were conducted in 1959 and 1960.