相马氏莲座蕨 xiang ma shi lian zuo jue

Archangiopteris somae Hayata, Icon. Pl. Formosan. 5: 256. 1915 ["somai"]; A. henryi Christ & Giesenhagen var. somae (Hayata) Tagawa; Protangiopteris somae (Hayata) Hayata.

Fronds 50-85 cm; stipes 20-70 cm, with 1(or 2) naked pulvinus. Laminae once pinnate; pinnae 4-6, alternate to subopposite, (ob-)lanceolate, (15-)22-25(-28) × 3-6.5 cm, bases cuneate, margins undulate, crenate to dentate, apices caudate to acuminate. False veins absent. Sori medial, 1-2 cm, composed of up to 170 sporangia; paraphyses present, longer than sporangia.

● Forests. Taiwan.