Acaulon rufescens A. Jaeger
Plants yellow- to red-brown in nature. Spores variably low papillose-punctulose or smooth.
Capsules mature late fall to early spring. Soil, gravel pit, pasture, lawn; low to moderate elevations; B.C., Ont., Que., Sask.; Ariz., Calif., Ill., Fla., La., Md., Mich., Miss., Mo., Nebr., N.J., N.Y., Okla., Oreg., S.C., Tex., Wis.;. Am1. Mexico.
A specimen from New Jersey (Austin 51--UBC) is reddish and has small (ca. 20 µm), round, weakly papillose spores; generally spore size is not a good character. Another specimen with large (38--40 µm), round, punctulate spores is piebald with adherent granules similar to the papillae of var. muticum. One specimen placed with var. rufescens (California, Santa Clara Co., Stanford University, W. Schofield 5724, Feb.23, 1955--UBC), is rather immature, has a greenish cast and smooth, elliptic spores about 28-30 µm.