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FOC | Family List | FOC Vol. 2-3 | Thelypteridaceae | Metathelypteris

10. Metathelypteris glandulifera Ching ex K. H. Shing, Fl. Reipubl. Popularis Sin. 4(1): 322. 1999.

有腺凸轴蕨 you xian tu zhou jue

Plants 50-60 cm tall. Rhizomes long creeping, apices including stipe bases with deep brown linear-lanceolate scales and grayish white acicular hairs. Fronds approximate; stipes 20-30 cm, stramineous, above bases with similar hairs but sparsely so and with few scales; laminae oblong-lanceolate, ca. 30 × 14-16 cm, nearly tapering to bases, pinnate-pinnatifid, apices acuminate and pinnatifid; pinnae 10-14 pairs, spreading, subopposite, sessile, lanceolate, 7-8 × 1-1.5 cm, bases slightly tapering, rounded-truncate, pinnatifid nearly to costae, apices long acuminate; segments ca. 17 pairs, spreading, lanceolate, sometimes falcate, 1-1.2 × ca. 0.3 cm, bases decurrent, connected to each other by narrow wings, margins crenate, apices rounded-obtuse or acute. Veins not evident, lateral veins forked, 8-10 pairs per segment, proximal pair arising above bases of costae and not reaching margins. Laminae herbaceous, when dry dark green, abaxially covered with grayish white multicellular acicular hairs along rachises, costae, and costules, lateral veins and intercostal areas covered with short unicellular acicular hairs, mixed with small orange-red globose glands, adaxially densely grayish white acicular hairy along rachises and costae, hairs along veins sparse. Sori small, orbicular, 6 or 7 pairs per segment, attached near ends of acroscopic vein of forked lateral veins; sporangia each with 4 or 5 globose small glands along both sides of annuli; indusia orbicular-reniform, greenish, when dry grayish brown, membranous, subentire, not easily seen when mature.

● Dense forests. N Guangxi.

The lamina outline of Metathelypteris glandulifera is extremely similar to that of M. flaccida, but the pinnae are covered with orange-red globose glands abaxially; the sporangia also have a few similar glands along both sides of the annuli, and the pinnae are covered with unicellular short acicular hairs along veinlets and intercostal areas.


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