Cycas ferruginea F.N.Wei

Cycad (en)

Species

Gymnosperms > Cycadales > Cycadaceae > Cycas

Characteristics

Trunk generally subterranean, sometimes to 60 × 25 cm above ground, base swollen; bark dark gray and scaly toward apex of trunk, white-gray and nearly smooth toward base. Leaves 25-40, 1-pinnate, 1-2 m × 25-55 cm; petiole subterete, 30-70 cm, with (0-)8-21 spines along each side, densely rusty brown tomentose when young; leaf blade oblong, flat; leaflets in 60-100 pairs, longitudinally inserted at ca. 90° to rachis, not overlapping, straight or downcurved, 13-18 cm × 5-12 mm, papery to subleathery, densely red-brown tomentose abaxially when maturing, later becoming light green and sparsely tomentose, midvein raised on both surfaces, base attenuate, symmetric, margin strongly revolute, apex acute to acuminate, somewhat soft at maturity. Cataphylls triangular, 3-4 × 1-1.3 cm, brown tomentose, apex soft. Pollen cones ovoid-fusiform, 20-30 × 6-8 cm; microsporophylls broadly cuneate, 1.5-3 × 1.2-1.5 cm, apical (sterile) part subrhombic, thickened, densely pale brown tomentose, margin inconspicuously toothed, apex with upcurved mucro. Megasporophylls more than 30, tightly grouped, 8-14 cm, tawny tomentose; stalk 4.5-7.5 cm; sterile blade rhombic-ovate, 3.5-5.5 × 3-5 cm, margin glabrescent and pectinate, with 17-31 subulate lobes 1-2.5 cm, terminal lobe subulate, 3-4 cm; ovules 2 or 3 on each side of stalk, glabrous. Seeds 2-4, yellowish when fresh, brown when dry, obovoid or subglobose, 2-2.8 × 1.8-2.5 cm, apex mucronate; sclerotesta smooth. Pollination Mar-Apr, seed maturity Aug-Oct.
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Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality dioecy
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Nitrogen fixer nostocaceae
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Cultivation

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Distribution

Cycas ferruginea world distribution map, present in China

Conservation status

Cycas ferruginea threat status: Near Threatened

Identifiers

LSID urn:lsid:ipni.org:names:980748-1
WFO ID wfo-0000631567
COL ID 32S39
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Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Cycas ferruginea