Family Code: ASTERA Genus Code: PITYO2 Genus CN: silkgrass Genus Authority: Nutt. Genus Summary: (contributed by Alan S. Weakley & Bruce A. Sorrie) Genus References: Semple in FNA (2006b); Semple & Bowers (1985)=Z; Ward (2004c)=Y; Bowers (1972)=X; Cronquist (1980)=SE. Key based largely on Semple in FNA (2006b). Last Updated: 2019-11-29 Publish: 1