Stem: The stem is cylindrical, 3(-8) meters high and 45(-95) cm in diameter. It often bears adventitious buds at the base or lower part, sometimes branches, and the top is densely covered with thick hairs; the dry skin is gray-black, With persistent leaf scars;
Leaves: 40-100 or more leaves, one pinnae split, 0.7-1.4 (-1.8) meters long, 20-25 (-28) cm wide, the pinnae extend in a V shape; the petiole is 10-20 cm long, There are 6-18 pairs of spines; the pinnae are straight or nearly sickle-shaped, leathery, 10-20 cm long, 4-7 mm wide, slightly twisted at the base, extending downward on the outside, tapering at the apex, with a spine-like tip, and sparse below. It is pubescent, the edges are strongly recurved, the center is slightly concave, the midrib is green on both sides, the upper side is slightly raised or nearly flat, the lower side is significantly raised, and the cross section is V-shaped;
Male cone: The microsporophyll is ovate-cylindrical, 30-60cm long, 8-15cm in diameter; the microsporophyll is narrowly wedge-shaped, 3.5-6cm long, 1.7-2.5cm wide, with a rounded truncate apex and a short pointed tip. ;
Megaspore: Megasporophyll is 15-24 cm long, densely covered with gray-yellow tomentose, sterile top piece ovate or narrow ovate, 6-12 cm long, 4-7 cm wide, with deeply lobed edges, 10-10 lobes on each side. 17, subulate-shaped, 1-3 cm long; ovules 4-6, densely covered with light brown hairs;
Seeds: 2-5 seeds, orange-red, obovate or oblong, obviously flattened, 4-5 cm long, sparsely covered with tomentose, smooth midseed, without grooves on both sides;
Cycas revoluta seeds
sago palm, king sago, sago cycad, Japanese sago palm,Cycas revoluta var. robusta Cycas revoluta var. brevifrons Cycas revoluta var. prolifera Cycas revoluta var. planifolia
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