Sceptridium jenmanii (Underw.) Lyon

Botrychium alabamense Maxon, Proc. Biol. Soc
Wash. 19: 23. 1906.
Plant 7-38 cm. high, lax and slender, the rhizome mostly erect ; bud hairy, entirely enclosed; commonstalk short, hypogean ; lamina lax, with a stalk 1.5-11 cm. long, broadly deltoid, rhombic or pentagonal, acute or obtuse, 4.5-21 cm. long, 7-22 cm. broad, two or three times pinnately or subternately divided, with distant, often long-stalked primary divisions, the lowest deltoid to pentagonal, the upper ones oblong or lanceolate to deltoid, the penultimate divisions lanceolate or oblong to oblong-ovate, pinnately divided into two to six cuneiform to fan-shaped, or ovate to orbicular, mostly sessile, usually distant, oblique lateral segments, and somewhat larger, similarly shaped tips, the outer margins finely serrulate; sporophyl 6-33 cm. long, the stalk 4-27 cm. long, the panicle lax; spores maturing in September.
Type locality : Spring Hill, Alabama. Distribution : Alabama and Georgia.

Sceptridium jenmanii, the Alabama grapefern or Dixie grapefern, is a species of fern in the Ophioglossaceae native to the southeastern United States. It is a rare species, and is apparently in decline. Like other grape ferns, it depends on a mycorrhizal association in the soil to survive.

Sceptridium jenmanii là một loài dương xỉ trong họ Ophioglossaceae. Loài này được Underw. Lyon mô tả khoa học đầu tiên năm 1905.