粗壮阴地蕨 cu zhuang yin di jue

Botrychium rutifolium A. Braun var. robustum Ruprecht ex Milde, Nova Acta Regiae Soc. Sci. Upsal., ser. 3, 26: 763. 1858; B. longipedunculatum Ching; B. multifidum (Gmelin) Ruprecht var. robustum (Ruprecht ex Milde) C. Christensen ex Hultén; B. sutchuanense Ching.

Plants small, hardy. Rhizomes erect, short, cylindrical. Fronds 35-40 cm tall. Sterile lamina: stalk 2-7 cm or more, up to 1 cm in diam., fleshy; lamina bi- or tripinnatifid, dull green, pentagonal, 6-11 × 7-11 cm; pinnae 4-6 pairs, subopposite, lower ones stalked; basal pinnae largest, ovate to triangular, 4-6 × 2.5-4.5 cm, bipinnate to tripinnatifid; pinnules 3 or 4 pairs, narrowly oblong or lanceolate, lower basal pinnule longest, 2.5-4 × 1.5-2 cm; ultimate segments ovate or oblong, margin dentate; costae and costules beneath sparsely lanuginose, lateral veins obscure. Sporophore arising from middle or lower part of common stipe, with longer stalk, up to 10-25 cm, lamina 4-11 cm, bipinnate to tripinnate, spikelike; pinnae short; sporangia ellipsoid-globose, each on tip of short but distinct ultimate axes or veins. Spore irregularly reticulate with minute granules. 2n = 90.

Forests, grasslands; 1000-2000(-4000) m. Chongqing, Heilongjiang, Jilin, Liaoning, Sichuan, Yunnan [Japan, Korea, Russia].