Adiantum species
Creators: name: Cádiz-Véliz, Arón
name: Palma-Villalobos, Bárbara
name: Villarroel, Alejandro E.
name: Muñoz-Schick, Mélica
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Pteridaceae
Adiantum

description: Identification key to Adiantum species in Chile, modified from Rodríguez (1995, 2015) and Sundue et al. (2010)
1. Pinnules glabrous................................................................................................................................................................................2
- Pinnules not glabrous .........................................................................................................................................................................5
2. Blades 1 pinnate .................................................................................................................................................................. A. pearcei
- Blades 2–3 pinnate .............................................................................................................................................................................3
3. Veins sparse (≤4), spaced, conspicuous; rachises with septate trichomes and narrow scales up to 2 mm long; blades herbaceous ... ............................................................................................................................................................................................ A. excisum
- Veins numerous (>4), approximate, inconspicuous; rachises glabrous; blades coriaceous ...............................................................4
4. Apical pinnules cuneate-flabellate; veins ending in the center of a tooth.............................................................. A. capillus-veneris
- Apical pinnules subtrapezoidal or reniform; veins ending between two teeth................................................................... A. chilense
5. Blades with simple or glandular trichomes ........................................................................................................................................6 - Blades with glomerular trichomes (mealy texture) ............................................................................................................................8
6. Blades with simple, non-glandular trichomes, without sticky or aromatic resin ...............................................................................7
- Blades with capitate and glandular trichomes, producing sticky and aromatic resin........................................................ A. viscosum
7. Blades with trichomes ≤ 1 mm long; pinnae subtrapezoidal to reniform................................................................... A. glanduliferum
- Blades with trichomes 1–1.5 mm long; pinnae rhomboidal.............................................................................................. A. gertrudis
8. Pinnules covered with white glomerular trichomes .......................................................................................................... A. scabrum
- Pinnules covered with yellow glomerular trichomes .........................................................................................................................9
9. Glomerular trichomes rounded........................................................................................................... A. sulphureum var. sulphureum
- Glomerular trichomes elongated ................................................................................................................. A. sulphureum var. majus
description: Published as part of Cádiz-Véliz, Arón, Palma-Villalobos, Bárbara, Villarroel, Alejandro E. & Muñoz-Schick, Mélica, 2023, Adiantum viscosum (Pteridaceae), a new species endemic to sclerophyllous forest of Central Chile, pp. 183-192 in Phytotaxa 599 (3) on pages 189-190, DOI: 10.11646/phytotaxa.599.3.5, http://zenodo.org/record/8012573