Christensenia (plant)
Christensenia is a genus of ferns in the botanical family Marattiaceae. The genus is confined to the Indo-Malayan region. The basal chromosome number for this genus is 2n=80.
- For the broad-nosed weevil genus, see Christensenia (beetle).
| Christensenia | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Class: | Polypodiopsida |
| Order: | Marattiales |
| Family: | Marattiaceae |
| Genus: | Christensenia Maxon |
| Synonyms | |
|
Kaulfussia C.Presl | |
Christensenia is unique in the Marattiaceae, because of its reticulate venation, palmately arranged leaves and radial synangia. Christensenia produces enormous amounts of spores, up to 7,000 spores per sporangium. The presence of a radial synangium is an archaic character, very similar to some of the fossil Asterothecaceae/Psaroniaceae, such as Scolecopteris. Christensenia itself has no fossil record.
Species
After the 1993 revision by Rolleri, only two species and one variety are recognized:
- Christensenia aesculifolia (Blume) Maxon (type species)
- Christensenia aesculifolia var. korthalsii
- Christensenia lobbiana (de Vriese) Rolleri
References
- BRUMMITT, R. K. (1992) Vascular plant families and genera. Royal Botanic Gardens
- Pink, A. (2004). Gardening for the Million. Project Gutenberg Literary Archive Foundation.
- Rolleri, C. H. 1993. Revision of the genus Christensenia. Amer. Fern J. 83(1): 3-19.
 |
Wikispecies has information related to Christensenia. |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.