Sporobolus compositus

{{Short description|Species of flowering plant}}

{{Italic title}}

{{Speciesbox

|name = Tall dropseed

|image = Sporobolus compositus var compositus BB-1913.png

|image_caption = 1913 illustration
S. compositus var. compositusBritton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 1: 196.

|genus = Sporobolus

|species = compositus

|authority = (Poir.) Merr.

|subdivision_ranks = Varieties

|subdivision = *S. c. var. compositus

• S. c. var. drummondii
• S. c. var. macer

|synonyms = {{center|Sporobolus asper
(Beauv.) Kunth}}

}}

Sporobolus compositus, the composite dropseed{{PLANTS|id=SPCO16|taxon=Sporobolus compositus|accessdate=27 November 2015}} or tall dropseed, is a native North American prairie grass growing from two to four feet tall. Also called rough dropseed and meadow dropseed, it is common on the Great Plains, and found in most states in the United States.

It flowers from August to September. The name derives from the readily falling grain. Dropseed has little value as food; its palatability decreases with its age.