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Athyriaceae | Family List | Athyriaceae | Athyrium

Athyrium reflexipinnum Hayata


Athyrium reflexipinnum

Credit: Liu, Yea-chen

Summer-green. Rhizome stout, ascending to erect, covered with persistent stipe bases; scales thin, rusty-brown, ovate-lanceolate, 203 mm long 0.5 mm broad. Stipe much shorter than lamina, tufted, slender, stramineous sometimes purplish, 3-20 cm long; lamina narrowly lanceolate, deeply bipinnatifid to bipinnate (basal pinnules free), 10-20 cm long, 3-6 cm wide; all except upper pairs of pinnae reflexed, 2-4 cm long, sessile; pinnules cut nearly to costa, obtuse, dentate, adaxial basal pinnule enlarged, herbaceous, glabrous, fertile even in small leaves; ultimate segments oblong to elliptic, serrate or sharply lobed at margin; very short spines present on the adaxial side of costae. Sori medial or basal on lower veinlets; indusia oblong, J-shaped or reniform; margins somewhat erose.

Taiwan, Japan, Shikoku and Kyushu (Yakushima), and S. Korea.

Habitat: Edge of forest or side by the trail, Understory of Forest

Leaf shape: Lanceolate

Apex of Leaf: Acuminate

Leaf Division: Bipinnatifid

Length of Stipe: 7 (5-15)

Length of Lamina: 15 (5-20)

Width of Lamina: 7 (3-15)

Stipe Color: Stramineous

Free Pinnulate in basal Pinnae: No

Form of basal Pinnulate arrangement: Opposite

Apex of Pinnae: Acute

Petioled in pinnae: Sessile

Length of Lowest Pinnae: 3 (1-5)

Wideth of Lowest Pinnae: 1 (0.5-3)

Lowest pinnae with enlarged basiscopic pinnules (more than 3 mm): No, less than 3 mm

Apex of terminal fragment: Round or Obtuse

Margin of terminal fragment: Serrulate, Denticulate

Type of Basal of Pinnule: Broadly adnate

Anterior pinna or pinnule auriculate: not auricaulate

Lowest Pinnae with shorter basal pinnule: No, basal pinnule similar with next two pinnules

Second Lowest Pinnae with shorter basal pinnule: No, Basal Pinnulate similar with next two

Abaxial Surface of Rachis with Unicellular Hairs ?: Yes, densely coved with unicellular hairs (pubescent)

Abaxial Surface of Rachis with Gland Hairs?: Yes, there are rare gland hairs on rachis

Abaxial Surface of Coaste with Unicellular Hairs ?: Yes, densely coverd unicellular hairs on costae (pubescent)

Type of Adaxial Costae Spines: None, Short spines

Spines Existing on Adaxial Costulate: No, spines Absent on costulate

Type of Scales on Basal Stipe: Lanceolate

Color of Scales on Basal Stipe: Yellow Brown

With Adventitious Bud near the Apex of Leave: No, adventitious buds absent

Sori Shape: Short straight, Curved

Sori Position: Closed to midrib

Type of Rhizome: Short Erect

Geographic Distribution: Taiwan - Japan

Altitude: 2800 (2500-3300)


Related Objects  
  • Habitat (Liu, Yea-chen)
  • Image/JPEG

    Flora of China  
  • Illustration
  • Illustration

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