Sceptridium schaffneri (Underw.) Lyon

Botrychium pusillum Underw. Bull. Torrey Club 30 : 50. 1903
Sceptridium pusillum Lyon, Bot. Gaz. 40 : 458. 1905.
Plant 6-11 cm. high, fleshy, the rhizome ascending ; bud hairy, entirely enclosed ; commonstalk short, hypogean ; lamina with a stalk 1-2 cm. long, broadly deltoid to pentagonal, obtuse, 2-3 cm. long, 3-5 cm. broad, about 3 times pinnately or subternately divided, the primary divisions oblong or lanceolate to deltoid or pentagonal, the penultimate divisions oblong or lanceolate, pinnately divided into small crowded, often imbricate, oblique, oblong or ovate, rounded or acute, somewhat fleshy lateral segments, and broader, rhomboid tips, the margins of the segments entire or barely crenulate ; sporophyl 3.5-8 cm. long, the stalk 2.5-5 cm. long, the panicle about twice divided, with crowded sporangia; spores maturing from September to October.
Type locality : Sierra de las Cruces, State of Mexico, altitude 3000 meters. Distribution : Known only from the type collection.

Botrychium schaffneri Underw. Bull. Torrey Club 30 : 51. 1903
Sceptridium Schaffneri Lyon, Bot. Gaz. 40 : 458. 1905.
Plant 32-43 cm. high, rather fleshy, strict; bud hairy, entirely enclosed; commonstalk short, hypogean ; lamina with a stalk 4.5-11 cm. long, broadly deltoid to pentagonal, obtuse, 3-14.'5 cm. long, 5-20 cm. broad, 4-6 times pinnately or subternately divided, the primary divisions crowded and imbricate, lanceolate to deltoid, the penultimate divisions lanceolate or ovate-lanceolate, pinnately divided into very small, oblique, oblong to ovate, lateral segments, and rhomboid tips, the margins of the segments entire or notched ; sporophyl 28-39 cm. high, the panicle usually rather compact.
Type locality: Near San I^uis Potosi. Distribution : San Luis Potosi and Valley of Mexico.