All Floras      Search Specimen
Login | eFloras Home | Help
IBSC | Family List | Pteridophyta | Aspidiaceae

Pteridrys C. Christensen et Ching

牙蕨属

Description from Flora of China

Plants terrestrial, 1-2 m tall. Rhizome creeping, ascending, or erect; rhizome apex and stipe base covered with lanceolate scales; scales brown, 0.8-1.5 cm, margins entire. Fronds close or clustered; stipe light to dark stramineous or brown. Lamina 2-pinnatifid at base, elliptic, oblong, or ovate-lanceolate, widest at or below middle; basal pair of pinnae often largest, lanceolate or broadly lanceolate, basiscopic lobes elongate or not; lateral pinnae not adnate to rachis, ± deeply lobed, with a tooth in each sinus between two lobes; veins free; lamina papery or herbaceous, both surfaces usually glabrous; rachises grooved adaxially, glabrous; costae raised on adaxial surface, glabrous or sometimes with sparse short hairs on adaxial surface. Sori terminal or dorsal on veins, medial, one line on either side of costules; indusia present, persistent or fugacious; perispore consisting of anastomosing wings. n = 41.

Seven species: tropical Asia, from NE India, Sri Lanka, and S China, to Indochina, Malaysia, Borneo, Indonesia, and the Pacific islands; three species (one endemic) in China.

(Authors: Dong Shiyong (董仕勇); Maarten J. M. Christenhusz)


 

IBSC @ efloras.org
Browse by
Family
Genera
Search by name

Specimen Search

People @ IBSC

 

 

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