This winter annual is centered in the midwest (often in thin woods with Floerkea nearby). It has widely scattered occurrences elsewhere, but perhaps adventive in some cases. There is a coll. by G.F. Buddell from CAMP (KNK): "yardweed growing along sides of house and garage", 320 Fairview Drive, Dayton. There is also an old report from BOON (Nelson 1919).