Holotype (L)
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Cycas edentata

Cycas edentata de Laub., "in De Laub. & Adema, Blumea 43: 372" (1998). H—L
"TYPE: Philippines, Sulu Archipelago, Mt Cabucan, Kondo & Edaño 38877, (holo L, iso A, BM)."


Etymology: From the Latin dentata, toothed, with the Latin prefix e-, without, in reference to the megasporophyll apices.

Literature: Foxworthy 1911 (as circinalis), Merrill 1912 (as circinalis), Merrill 1917 (as C. rumphii), Merrill 1918 (as circinalis), Merrill 1921 (as circinalis), Merrill 1923 (as C. rumphii), Schuster 1932 (as C. rumphii p.p.), Zamora and Co 1979 (as C. circinalis), Amoroso 1986 (as C. rumphii).

Illustrations: Schuster 1932 (as C. rumphii p.p.), Amoroso 1986 (as C. rumphii).

Historical notes: Described by de Laubenfels and Adema in 1998.

Distinguishing features: very highly glossy leaves; long spines on microsporophyll tips, no or rudimentary teeth on megasporophyll tips, spongy endocarp in seed.

Distribution and habitat: Philippines only, usually in littoral forests.

Conservation status: Once abundant and widespread, this species occurred in coastal sites that have experienced severe pressures from population increase and development. Although probably not immediately threatened, it is potentially vulnerable in the longer term. IUCN (1994) Red List status VU ?.

Description:

Stems arborescent.

Leaves 150-180 cm long, flat (not keeled) in section (opposing leaflets inserted at 180° on rachis), with 160-200 leaflets, tomentum shedding as leaf expands. Petiole 30-60 cm long, glabrous, spinescent for 50% of length. Basal leaflets not gradually reducing to spines, 270 mm long.

Median leaflets simple, strongly discolorous, 270-370 mm long, 14-18 mm wide, 12-17 mm apart on rachis; section flat; margins slightly recurved; apex acute, not spinescent; midrib raised above, raised below.

Cataphylls narrowly triangular, soft, pilose, persistent.

Pollen cones fusiform, orange, 55-60 cm long, 11-13 cm diam.; microsporophyll lamina firm, not dorsiventrally thickened, 37-44 mm long, 12-23 mm wide, apical spine prominent, sharply upturned, 13-23 mm long.

Megasporophylls 24-34 cm long, brown-tomentose; ovules 2-4, glabrous; lamina lanceolate, 43-60 mm long, 20-30 mm wide, obscurely dentate, with soft lateral spines 0-1 mm long, apical spine distinct from lateral spines, 14-20 mm long.

Seeds flattened-ovoid, 55-66 mm long, 45-50 mm wide; sarcotesta orange-brown; fibrous layer absent; sclerotesta smooth. Spongy endocarp present.


The Cycad Pages

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