Asplenium marinum       0

Author: Carl von Linné (1707-1778)
Family: Aspleniaceae
Genus: Asplenium
English name: Sea Spleenwort
Zone: Mediterranean

Description
You can find it from southern Norway to North Africa and Macaronesia (The group of islands in the Atlantic Ocean West of Africa and Europe, consisting of the archipelagos of the Azores, Madeira, Canary Islands and Cape Verde Islands). It always attaches to the siliceous cliffs near the ocean or the sea. Most frequently in Brittany and England. An Asplenium which is little known in cultivation, it is resistant to salt, it likes the spray, the northern exposure and it requires a siliceous substrate.

Experiences
What a magnificent plant, once divided, the spines are elongated, with rounded serrated edges, arranged alternately on both sides of the rachis! The leaf is thick, dark green and shiny and contrasting well with the dark granite cliffs where it settles.
Asplenium marinum Observed in Spain by Godo (license)
Botanical Description
Evergreen fern, 4 to 10 inch. Zones 8 (with appropriate pampering) and 9. Erect rhizome. The marginally winged stipes are deep purple and usually up to one-third of the frond length. Once-pinnate kelly-green blades are succulent and lanceolate with 20 to 25 pairs of stalked pinnae. Sori are easily recognized by their herringbone, linear pattern with an indusial flap.

References
- Encyclopedia of garden ferns, Sue Olsen. 2007. ISBN
- Flora iberica, Santiago Castroviejo. 2010 Vol. 1 pag. 92. ISBN
- Malta Wild Plants. Asplenium marinum
References for the genus
- A new species of Asplenium section Thamnopteris ( Aspleniaceae ) from Indonesia, Dong, Shi-Yong and Wei, L.L. and Chao, Yi-Shan. Blumea - Biodiversity, Evolution and Biogeography of Plants 2012 Vol. 57 pag. 190-194. DOI
- A taxonomic revision of the New Zealand species of Asplenium, P. J. Brownsey. New Zealand Journal of Botany 1977 Vol. 15(1) pag. 39-86. DOI
- An annotated checklist of the vascular plants of Taita Hills, Eastern Arc Mountain. PhytoKeys 2022 Vol. 191 pag. 1-158. Address
- Asplenium ceterach and A. octoploideum on the Canary Islands (Aspleniaceae, Pteridophyta), heede, Caroline and Pajarón, Santiago and Pangua, Emilia and Viane, Ronald. American Fern Journal 2009 Vol. 94 pag. 81-111. DOI
- eFloras. eFloras.org Vol. 2 pag. 102877. Asplenium
- Encyclopedia of garden ferns, Sue Olsen. 2007 pag. 104-124. ISBN
- Flora iberica, Santiago Castroviejo. 2010 Vol. 1 pag. 90-104. ISBN
- Flora of Southern Africa, L.E. Codd, B. De Winter And H.B. Rycroft. Vol. P pag. 173-205. Address
- Flora of Turkey and the East Aegean Islands, P.H. Davies. 1984 Vol. 1 pag. 48-52. ISBN
- Megaspore investigations of Selaginella species from São Paulo, Brazil, Bauer, Dennise and Prado, Jefferson and Trovó, Marcelo and Coan, Alessandra and Stützel, Thomas and Schulz, Christian. American Fern Journal 2016 Vol. 106 pag. 55-86. DOI
- New addition to the Asplenium normale complex (Aspleniaceae): an endemic forma in Taiwan, Chang, Zhi-Xiang and Kuo, Li-Yaung and Lu, Pi-Fong and Huang, Yao. Taiwania 2020 Vol. 65 pag. 253-260. DOI
- Phylogenetic analysis of Asplenium subgenus Ceterach (Pteridophyta: Aspleniaceae) based on plastid and nuclear ribosomal ITS DNA sequences, Heede, Caroline and Viane, Ronald and Chase, Mark. American journal of botany 2003 Vol. 90 pag. 481-95. DOI
- Taxonomic studies on Asplenium sect. Thamnopteris (Aspleniaceae) I: Cytological observations, Dong, Shi-Yong. American Fern Journal 2011 Vol. 101 pag. 156-171. DOI
- Taxonomic studies on Asplenium sect. Thamnopteris (Aspleniaceae) II: Spore morphology, Wei, Ling-Ling and Dong, Shi-Yong. Nordic Journal of Botany 2012 Vol. 30. DOI
- Typification and nomenclature of the western Indian Ocean islands ferns and lycophytes described in Linnaeus filius's Supplementum plantarum, Callmander, Martin and Mazumdar, Jaideep and Jarvis, Charles. Candollea 2019 Vol. 74 pag. 223. DOI
General specifications
Indigenous plant
Biological type: fern
Frost resistance: 5ºF
Leaf color: dark green
Reproduction mode: cryptogams plant that reproduce via spores

Specifications for the Mediterranean basin
Adult size (h x w): 1,3ft x 1,3ft
Plant with a spacing of: 1,1ft
Sun exposure: big part shadow (Sun hours: <2h
Foliage: evergreen
Growth: average

Specific information for our garden
Planting substrate: 40%Compost+20%Peet+40%Sand
Plant watering: 3x a week pH 5.5
Logical sequence of containers for: Ferns; container, C1 container, 2L forestry pot, 6L container, 55L container
Propagation is done by root division

Ecology in its country of origin
Rainfall: 800-2000mm
Gravelly soil: much
Coastal soil: much
Sowing instructions
SPRING Sow in an airtight container. The tray and the sterilized substrate. No direct sunlight on the substrate. The seeds germinate in 18-18 weeks.
The average seed weight is 100000,0 per gram (0,00001g).

Germination references
- Germination and reproductive biology in salty conditions of Asplenium marinum (Aspleniaceae), a European coastal fern, Pangua, Emilia and Belmonte, Román and Pajarón, Santiago. Flora - Morphology, Distribution, Functional Ecology of Plants 2009 Vol. 204 pag. 673-684. DOI

Experiences in the garden
03-06-19A Obtaining seeds from seed provider American Fern Society collected in '....'. (Cultivated from unknown origin)
25-06-19 Sown seeds in a tray, they did not geminate in Serre4.
Protocol: Spring Surface Fern sowing mix 68-77°F Ferns
04-01-21B Obtaining seeds from seed provider American Fern Society collected in '....'. (Cultivated from unknown origin)
17-03-21 Sown seeds in a tray and germinated at 26-07-21, result: 8 units in Serre1.
Protocol: Spring Surface Fern sowing mix 59-68°F Ferns
. . . 2021B Production of 8 plants in our nursery (Cultivated from unknown origin)
21-09-23 7x Plants eaten by rodents: Serre1 C1.
18-07-24 1x Dead plant because of heat and drought in summer: Serre1 C1.