Abrodictyum C. Presl
- Dataset
- Abrodictyum inexpectatum, an unexpected new fern species (Hymenophyllaceae, Polypodiidae) for Madagascar, as revealed by an integrative approach
- Rank
- GENUS
Classification
- kingdom
- Plantae
- phylum
- Tracheophyta
- class
- Polypodiopsida
- order
- Hymenophyllales
- family
- Hymenophyllaceae
- genus
- Abrodictyum
Abrodictyum C. Presl
New key to the Abrodictyum species in the Afro-Malagasy region (modified from Dubuisson et al. 2017)
- Distal ultimate lobes or segment usually multi-veined and/or fused, often spatulate and appearing serrulate...... A. pachyphlebium
1. Distal ultimate lobes or segment usually single-veined, free, or sometimes fused by pair................................................................ 2
2. Lamina apparently absent or reduced to one row of cells on both sides of the veins........................................................................ 3
- Lamina always developed.................................................................................................................................................................. 4
3. Fronds subsessile or with short stipes not exceeding 4–5 cm, narrowly oblong to linear on herbarium, always with a narrowly cylindrical brush-like shape when fresh...................................................................................................................... A. cylindratum
- Fronds with stipes usually longer than 4–5 cm, narrowly to widely lanceolate when dried, plane or with a lanceolate brush-like shape when fresh......................................................................................................................................................... A. parviflorum
4. Lamina of ultimate segments usually not exceeding 3 cells on both sides of the veins..................................................................... 5
- Lamina of ultimate segments with usually more than 3 cells on both sides of the veins................................................................... 6
5. Lamina width often variable (1 to 3 rows of cells on both sides of the veins) within the same frond; fronds narrowly to widely lanceolate, plane or with a brush-like shape; usually more than 6 sori per pinna....................................................... A. parviflorum
- Lamina width usually not variable within the same frond; fronds narrowly oblong to linear, sometimes narrowly lanceolate but never widely lanceolate, always plane; often a single sorus per pinna, rarely more than 6 sori per pinna.................................................................................................................................................................................................................. A. angustimarginatum
6. Rhizomes erect; lamina without a clearly distinct marginal row of cells; plants usually terrestrial or saxicolous, rarely epiphytic............................................................................................................................................................................................................... 7
- Rhizomes short-creeping; lamina with a clearly distinct marginal row of cells; plants usually epiphytic, sometimes saxicolous..................................................................................................................................................................................... A. tamarisciforme
7. Fronds bipinnate-pinnatifid or more divided, always plane in the wild, never crispate or curled..................................................... 8
- Fronds rarely more than bipinnate-pinnatifid, usually with pinnules curled in the wild.................................................. A. franceae
8. Fronds often more divided than bipinnate-pinnatifid, broadly lanceolate to triangular, often exceeding 30 cm long; lamina dark green and opaque; sori cylindrical to slightly campanulate.................................................................................................. A. dregei
- Fronds usually not more divided than bipinnate-pinnatifid, usually not exceeding 13.5 cm long, narrowly lanceolate; lamina light green and translucent; sori obconic (cup-shaped)....................................................................................... A. inexpectatum sp. nov.
Name
- Homonyms
- Abrodictyum C. Presl
- Abrodictyum