德保苏铁

SPECIES

1. KingdomPlantae
2. PhylumTracheophyta
3. ClassCycadopsida
4. OrderCycadales
5. FamilyCycadaceae

Native toChina South-Central, China Southeast

Observations46

Observations recorded109

Trunk almost subterranean, to 40(-70) × 25(-40) cm above ground, sometimes clumped; bark brown-gray, scaly toward apex of trunk, subsmooth toward base. Leaves (3-)5-11(-15), 3-pinnate, ovate in outline, ± openly "V"-shaped in cross section at 110-150° between leaflets, 1.3-2.7 × 0.5-1.5 m; petiole obovate-orbicular in cross section, 0.6-1.3 m × 1.5-3 cm, tomentose when young, later glabrescent except at base, spiny except at base; spines 20-55 along adaxial part of each side, 1-4.5 cm apart, conical, 3-4 mm; primary leaflets in 6-14 pairs, 3-12 cm apart, middle leaflets subopposite, longest, 40-70 × 20-27 cm, "V"-shaped in cross section at 70-90° between secondary leaflets, basal and apical leaflets alternate, gradually smaller toward base and apex of leaf blade, 17-50 × 10-23 cm; secondary leaflets in 3-5 pairs, ovate to obtriangular, dichotomously 2- or 3-forked, 12-25 × 4-15 cm, with petiolule 0.5-2 cm; segments (ultimate leaflets) 3-5, green and shiny above, light green below, linear, 10-22(-28) × 0.8-1.5 cm, thickly papery, glabrous, midvein raised on both surfaces, base decurrent, margin flat or somewhat undulate, apex long attenuate or long acuminate. Cataphylls triangular,