- Agaricus strictior Peck
- Entoloma strictius var. cystidiosum Hesler
- Entoloma strictius var. irregulare Peck
- Entoloma strictius var. isabellinum Peck
- Nolanea strictior (Peck) Pomerl.
- Rhodophyllus strictior (Peck) Singer
Calvatia lycoperdoides