Dryopteris pallida explained

Dryopteris pallida is a species of fern.

Description

Dryopteris pallida is a winter-green Dryopteris fern of small to moderate size with very pale broad chaffy scales on the long somewhat pale stem and leaves that are often rather a pallid green; glands may be present.

The fronds are two-fold divided (2-pinnate), with the final leaflets (pinnules) usually being obviously stalked and also conspicuously lobed (sometimes almost further dividing the leaflet to 3-pinnate). The frond divisions are not greatly asymmetric so that the first divisions (pinna) closest to the ground have a lower part somewhat similar to the upper and subdivisions similar to adjacent ones.

The fertile sori under the leaflets are round with an incompletely rounded covering (reniform or kidney-shaped indusium), and are arranged as two lines, one on each side of the leaflet axis.

Its habitat is alkaline to acidic, 0 - 3000 m, in woods, scrubs and slopes, typically avoiding dry ground.^{[1] [2] [3] [4] [5] [6]}

Subspecies and range

• subsp. pallida - Albania, Algeria, Balearics, Corsica, Cyprus, Greece, Iran, Italy, Crete, Lebanon-Syria, Palestine, Sardinia, Sicily, Transcaucasus, Tunisia, Turkey, Yugoslavia.^[7]
• subsp. balearica (Litard.) Fraser-Jenk. - frond only to 25 cm with a deltate shape and stalk more than 50%^[1] - Baleares.^[8]
• subsp. libanotica (Rosenst.) E.Nardi - Cyprus, Lebanon-Syria, Palestine, Turkey.^[9]
• subsp. raddeana (Fomin) E.Nardi - Iran, Transcaucasus.^[10]

Resimli Türkiye Florası differs from Plants of the World in placing the Turkish plants as subsp. raddeana.

Notes and References

1. Book: Flora Europaea . Tutin.
2. Book: Resimli Türkiye Florası, Cilt. 2 (Illustrated Flora of Turkey, vol. 2) . Adil Güner.
3. Book: Flora of Turkey and the East Aegean Islands, vol. 1 . Davis.
4. https://dergipark.org.tr/tr/download/article-file/425432 "Türkiye'de Yetişen Dryopteris Türleri Üzerinde Farmasötik Botanik Yönünden Araştırmalar" by Nevin Tanker, Maksut Coşkun
5. Web site: Ferns and Fern Allies of Iran .
6. Book: Atlas of the Aegean Flora Part 1 . Arne Strid.
7. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77056865-1 Plants of the World Online (with map) (ssp pallida)
8. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:17558930-1 Plants of the World Online (with map) (ssp balearica)
9. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:17558950-1 Plants of the World Online (with map) (ssp libanotica)
10. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:17558960-1 Plants of the World Online (with map) (ssp raddeana)