Elkhorn Fern, Dwarf Elkhorn Fern, Climbing Bird’s Nest Fern, Terrestrial Elkhorn Fern, Fishtail Strap Fern, Fishtail Fern…
Microsorum punctatum (L.) Copel.
Polypodium punctatum (L.) Sw.
Synonyms of Microsorum punctatum (49) (Updated on 2-13-21): Acrostichum punctatum L., Aspidium microcarpon Blume, Drynaria irioides J.Sm., Drynaria obtusata Brack., Drynaria polycarpa Brack., Drynaria pulverulenta Brack., Microsorum irioides Fée, Microsorum irregulare Link, Microsorum neoguineense (Copel.) Copel., Microsorum polycarpon (Cav.) Tardieu, Microsorum sessile Fée, Microsorum subirideum (Christ) Copel., Microsorum validum Ching, Niphobolus polycarpus Spreng., Phymatodes irioides C.Presl, Phymatodes lingulata C.Presl, Phymatodes polycarpa C.Presl, Phymatodes sessilis C.Presl, Pleopeltis antrophyoides Alderw., Pleopeltis irioides T.Moore, Pleopeltis longifolia T.Moore, Pleopeltis megalosoroides Alderw., Pleopeltis millisora Alderw., Pleopeltis neoguineensis Alderw., Pleopeltis obtusata T.Moore, Pleopeltis polycarpa T.Moore, Pleopeltis pulverulenta T.Moore, Pleopeltis punctata Bedd., Pleopeltis sessilis T.Moore, Pleopeltis valida Alderw., Pleopeltis viridis Moore & Ridl., Polypodium altum Bojer, Polypodium ambiguum Blume, Polypodium antrophyoides Alderw., Polypodium crassinerve Schumach., Polypodium glabrum Roxb., Polypodium irioides Poir., Polypodium lingulatum Sw., Polypodium megalosoroides (Alderw.) C.Chr., Polypodium microsorum Mett., Polypodium millisorum Baker, Polypodium neoguineense Copel., Polypodium polycarpon Sw., Polypodium polycarpon var. obtusatum (Brack.) Fosberg, Polypodium polycephalum Wall., Polypodium punctatum (L.) Sw., Polypodium punctatum subsp. subirideum Christ, Polypodium subirideum Christ, Polypodium validum Copel.
Microsorum punctatum (L.) Copel. is the correct and accepted scientific name for this species of Microsorum. It was named and described as such by Edwin Bingham Copeland in University of California Publications in Botany in 1929. It was first named and described as Acrostichum punctatum by Carl von Linnaeus in the second volume of the first edition of Species Plantarum in 1753.
Now a synonym, Polypodium punctatum (L.) Sw. was the last name I had this plant listed as. This is the species this plant is commonly sold as at garden centers and online. It was described as such by Olof Peter Swartz in Journal für die Botanik in 1800 and 1801 which appears to be invalid. He again published the name and description in the same publication in 1802. I am really kind of confused about all that… Anyway, POWO has the link to the invalid name in IPNI and not the one that wasn’t validly published. Doesn’t matter, I suppose, since the Polypodium punctatum (L.) Sw. is a synonym anyway.
The genus, Microsorum Link, was named and described by Johann Heinrich Friedrich Link in Hortus Regius Botanicus Berolinensis in 1833.
Plants of the World Online currently list 56 species in the Microsorum genus (as of 2-13-21 when I last updated this page. It is a member of the plant family Polypodiaceae with 65 genera. Those numbers could change as updates are made Iand likely will).
I am not sure when the “last” official name change took place, but this species has flopped around mainly between Microsorum punctatum (L.) Copel. and Polypodium punctatum (L.) Sw. It is still commonly sold at garden centers under the name Polypodium punctatum AND Polypodium grandiceps. I have switched the names back and forth several times… Usually, every time I update this page it is different. Polypodium grandiceps is somehow an “unplaced” name… Ummm… From 1888. Somehow the species name became a cultivar name. Very good!
To make matters more confusing, there is a Wikipedia page that says Polypodium punctatum is a synonym of Hypolepis punctata. The caption under the photo even says Hypolepis punctata ‘Grandiceps’… WELL, that is a shocker, huh? The problem is… Polypodium punctatum Thumb. IS a synonym of Hypolepis punctata (Thunb.) Mett. but the photo and caption on the Wikipedia page is COMPLETELY wrong… You can see the Wikipedia page HERE. You have to pay attention to the author’s name. The information on the right side of the article is correct. Whoever wrote this page was misinformed which is a problem when several species were given the same scientific name by different authors… I contacted the author of the page to let him know the photo was wrong. Now, lets see how long it takes for him to correct it…
There are three other species of ferns that were named Polypodium punctatum by other authors which have been moved to other genera. They all have “typical ferny fronds”. instead of the strap-like fronds of this species… There are MANY species of ferns throughout much of the world that were given different names by different botanists. Then there are those, as in Polypodium punctatum, where the same name was given to several entirely different plants. Many species of ferns have MULTIPLE (understatement) synonyms. Like this one with 49…
Polypodium punctatum Thunb.=Hypolepis punctata (Thunb.) Mett.
Polypodium punctatum Spruce (or Spruce ex Hook)=Stigmatopteris lechleri (Mett.) C.Chr.
Polypodium punctatum Hook.=Grammitis punctata Raddi
Enough venting… 🙂
THERE ARE A FEW LINKS AT THE BOTTOM OF THE PAGE FOR FURTHER READING.
I brought my Dwarf Elkhorn Fern home from Lowe’s in Greenville, Mississippi in October 2011. I was living at the mansion in Leland at the time and was enjoying collecting plants. I am not sure how many times I have changed the scientific name of this plant…
Zones: USDA Zones 10b-11 (35 to 40° F).
Size: 18-24” tall and wide.
Light: Part to full shade.
Soil: Consistently moist.
There isn’t much online about caring for this species. I kept my Elkhorn Fern, or whatever you choose to call it, on the cypress shelf I made in the kitchen at the mansion beside the Staghorn Fern. I cared for them both the same way as they have similar requirements. They received morning sun and shade the rest of the day. I saved rainwater especially for my Elkhorn and Staghorn Fern and normally immersed their pots in a bowl of water whenever they needed it. Their soil should not dry out completely. They prefer dappled shade to part shade and their leaves will burn if in too much sun. I didn’t take them outside during the summer like most of the other plants.
I had no problems with this fern but I gave it to a good friend of mine when I moved back to the family farm in mid-Missouri in February 2013. Someday I will bring home another Elkhorn Fern when I have adequate conditions.
I hope you enjoyed this page and maybe found it useful. If you have any comments, questions or suggestions, I would like to hear from you. Please click on “like” if you visited this page. It helps us bloggers stay motivated. 🙂 You can check out the links below for further reading. The links take you directly to the genus and species of this plant.