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Athyriaceae | Family List | Athyriaceae | Athyrium

Athyrium silvicolum Tagawa, Acta Phytotax. Geobot. 2. 17. 1933.

高山蹄蓋蕨

Athyrium silvicolum
Spines on adaxial side

Credit: Liu, Yea-chen

Rhizome erect, covered with stupe bases; scales pale brown becoming dark brown, lanceolate. Stipes 20-35 cm long, stramineous, bisulacate, dark and scaly at base; lamina deltoid, 20-40 cm long by 18-30 cm wide, texture thin, bipinnate-tripinnate; pinnae petiolate, alternate, 9-18 cm long; basal pairs of pinnules petiolate; segments of pinnules on large fronds free and sessile, segments on smaller fronds cut about 1/2 way to costa; upper surface with spines along rachilla grooves and costae. Sori costal borne at the base of fork of a veinlet, 1-2 mm long; indusia usually straight, thin, brown, entire or slightly erose.

Taiwan and Japan.

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

Leaf shape: Deltoid

Apex of Leaf: Acuminate

Leaf Division: Bipinnate

Length of Stipe: 25 (15-40)

Length of Lamina: 35 (20-70)

Width of Lamina: 30 (25-50)

Stipe Color: Stramineous

Free Pinnulate in basal Pinnae: Yes

Form of basal Pinnulate arrangement: Anadromous

Apex of Pinnae: Acuminate

Petioled in pinnae: Obvious Petiole (more than 3 mm)

Length of Lowest Pinnae: 10 (8-15)

Wideth of Lowest Pinnae: 5 (3-8)

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

Apex of terminal fragment: Round or Obtuse, Acute

Margin of terminal fragment: Deep Lobed

Type of Basal of Pinnule: Petiolulate

Anterior pinna or pinnule auriculate: auricaulate

Lowest Pinnae with shorter basal pinnule: Yes, basal pinnule shorter than next two

Second Lowest Pinnae with shorter basal pinnule: Yes, Basal Pinnulate shorter than next two

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

Abaxial Surface of Rachis with Gland Hairs?: No, there is no gland hairs on it

Abaxial Surface of Coaste with Unicellular Hairs ?: No, there is no unicellular hairs on costae (glabrous)

Type of Adaxial Costae Spines: Long-soft spines

Spines Existing on Adaxial Costulate: Yes, spines Existing 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

Altitude: 1700 (1500-2000)


 

Related Objects Image Gallery 
  • Athyrium slivicola Tagawa (Liu, Yea-chen)
  • Image/JPEG
  • Sori position (Liu, Yea-chen)
  • Image/JPEG
  • Spines on adaxial side (Liu, Yea-chen)
  • Image/JPEG

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