All Floras      Advanced Search
Login | eFloras Home | Help
Chinese Plant Names | Family List | Dryopteridaceae | Polystichum

Polystichum rhombiforme Ching et S. K. Wu


Description from Flora of China

Plants evergreen. Rhizome erect, densely covered with lanceolate dark brown scales. Fronds 25-50 cm; stipe stramineous, 10-20 cm, 3-5 mm in diam. at base, densely covered with ovate and broadly lanceolate scales. Lamina bipinnate, broadly lanceolate, 20-40 × 5-9 cm, broadly cuneate or truncate, acuminate; rachis without proliferous bulbils, both surfaces densely scaly; scales brown, lanceolate and linear, margins ciliate. Pinnae 24-30 pairs, alternate, slightly ascendant, approximate, oblong-lanceolate, middle pairs 2.5-5 × 1-2 cm, obliquely broadly cuneate, shortly stalked, pinnate, acute or acuminate. Pinnules 5-7 pairs, alternate, slightly ascendant, approximate, obliquely oblong or rhombic, bases cuneate, distal margins with open long spinulose teeth, apices acute and prolonged into spinules; basal acroscopic pinnules largest, 7-10 × 3-6 mm; abaxially scaly; microscales filiform, strongly ciliate at base; frond texture leathery; venation pinnate on pinnules, midrib concave adaxially; lateral veins slightly concave abaxially, indistinct adaxially. Sori in 1 row on each side of midrib; indusia present, entire.

● Alpine mixed broad-leaved coniferous forests, alpine Quercus forests; 2200-3300 m. W Sichuan, Xizang, NW and W Yunnan.


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