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Chinese Plant Names | Family List | Thelypteridaceae | Parathelypteris

Parathelypteris petelotii (Ching) ching


Description from Flora of China

Thelypteris petelotii Ching, Bull. Fan Mem. Inst. Biol., Bot. 6: 326. 1963; Coryphopteris petelotii (Ching) Holttum; Lastrea petelotii (Ching) Tagawa.

Plants to 70 cm tall. Rhizomes thick and erect, ± trunklike. Fronds clustered; stipes ca. 30 cm, with sparse scales at bases and with dense grayish white multicellular acicular hairs, distally castaneous-brown and subglabrous; laminae oblong-lanceolate, ca. 40 × 15 cm, slightly tapering to bases, pinnate-pinnatifid, acuminate and pinnatifid at apices; pinnae ca. 20 pairs, alternate, sessile, proximal ones somewhat shortened, reflexed, lanceolate, ca. 10 × 2-2.5 cm, bases truncate, symmetrical, pinnatifid nearly to costae, apices long acuminate; segments 20-40 pairs, spreading, segments below middle narrowly rectangular, ca. 1 × 0.3 cm, shallowly undulate or usually sparsely bluntly serrate along margins, slightly bent distally, rounded at apices. Veins evident on both sides, lateral veins simple, 6-8 pairs per segment, proximal pair arising from base of costules. Laminae herbaceous, dark green when dry, with dense reddish purple spherical glands abaxially, costae and veins with dense grayish white multicellular acicular hairs; adaxially spreading appressed pubescent throughout; rachises dark stramineous, pubescent adaxially, glabrous abaxially. Sori orbicular, dorsifixed at middle of lateral veins, 3-6 pairs per segment; indusia large, orbicular-reniform, thickly membranous, brown, with spreading grayish white long acicular hairs throughout, persistent.

Evergreen forests; ca. 1500 m. S Guangxi [N Vietnam].


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