All Floras      Advanced Search
Login | eFloras Home | Help
Chinese Plant Names | Family List | Athyriaceae | Athyrium

Athyrium dentilobum Ching et S. K. Wu


Description from Flora of China

Rhizomes short, erect, apex densely clothed with dark brown or blackish brown, shiny, broadly lanceolate scales. Fronds caespitose; fertile fronds ca. 60 cm; stipe blackish brown at base, upward pale green-stramineous, shiny, 30-35 cm, base ca. 1.5 mm in diam., similarly densely scaly, upward glabrate; lamina 2-pinnate, oblong, 28-30 × 18-22 cm, base not narrowed, broadly rounded, apex acuminate; pinnae ca. 12 pairs, alternate, ascending, with stalk up to 5 mm; basal pinnae narrowly oblong, up to 12 cm × ca. 5 cm, base subequilateral, rounded-cuneate, pinnate, apex long acuminate; pinnules ca. 12 pairs, alternate, anadromous, subspreading, separate from each other, lower pinnules shortly stalked (stalk ca. 1.5 mm), upper pinnules sessile; basal basiscopic pinnules longer, narrowly oblong, up to 3.5 × ca. 1.3 mm, base inequilateral, truncate and somewhat auriculate on acroscopic side, cuneate on basiscopic side, decurrent, pinnatipartite, apex obtuse; pinnule segments 7 or 8 pairs, slightly oblique, approximate, narrowly oblong, basal acroscopic segments larger, nearly free, 7-8 × ca. 3 mm, pinnatilobate, small segments with 2 or 3 teeth at apex; upper segments smaller, 5-6 × ca. 2 mm, obtuse-truncate and with 4-6 teeth at apex, margin subentire; other pinnules smaller, oblong or oblong-lanceolate, apex obtuse-rounded or acute; second basal pinnae slightly narrowed, ca. 4 cm wide at base; pinnules ca. 2 cm, base subequilateral, truncate on acroscopic side, cuneate on basiscopic side, pinnatipartite, apex obtuse-rounded or acute; pinnule segments 4 or 5 pairs, oblong, truncate and with 4-6 teeth at apex; third basal and upper pinnae similar to second basal pinnae but gradually shortened; veins visible on both surfaces, pinnate in segments, lateral veins 2-4 pairs, simple. Lamina herbaceous when dried, greenish brown, glabrate on both surfaces; rachis and costae stramineous, glabrate abaxially, with subulate spines on adaxial side at base of costae or costules. Sori oblong, 1 per segment, 3-5 sori on basal acroscopic segments, costular; indusia brown, oblong, occasionally J-shaped, membranous, margin erose, persistent. Perispore surface without folds.

● Coniferous forests; ca. 2600 m. SE Xizang (Mêdog, Namjagbarwa).


Related Objects  

Flora of China  
  • Illustration
  • Illustration

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |