Alsophila rosenstockii
Alsophila rosenstockii, synonym Cyathea ascendens, is a species of tree fern native to northeastern New Guinea, where it grows in rain forest at an altitude of . The erect trunk is slim and  tall. Fronds are bi- or tripinnate and may be over  in length. They form a distinctive open crown. The stipe is covered in glossy scales with pale, fragile edges. Sori occur near the midvein of fertile pinnules and lack indusia.

References

rosenstockii
Endemic flora of New Guinea