Doesn't like Kool-Aid
Join Date: Feb 2003
Location: Hawthorne, New Jersey
Kasselmann, page 276:
Other: Two kinds of Echinodorus tenellus are cultivated in aquariums. they differ in coloring, leaf length, and growth height. Whereas one form displays light green, short blades, as well as low growth in the aquarium, the other form develops medium to dark green, often brownish, considerably longer leaf blades, and a growth height up to 5cm.
That is understood. I never claimed there were not two types of E. tenellus. Note how Kasselmann herself calls them two kinds. She has not made the assumption of variety.
Aquarium Plants Handbook does mention two forms and variety. The only problem I would have with The Aquarium Plant Handbook is that it is in fact a plant selling catalog by Oriental Aquarium. I would defer to Kasselmann. I would love to see the other source you cited. Is that an AGA publication?
Now, my objections were not with the types or forms of E. tenellus. I am aware there are three different types being talked about. Magnus does a good job explaining that. What I do object to is the use of the scientific name Echinodorus microtenellus. By using this Latin name, you have created a whole new species. I searched and searched and could find no plant in the Genus Echinodorus to be of the species microtenellus. Therefore Echinodorus tenellus and Echinodorus microtenellus (if that species actually existed) would constitute two different plants since they are of two different species.
Calling the plant Echinodorus tenellus var."micro leaf" makes much more sense.
Either way all of the mentioned forms are in fact varieties of the same plant, that plant being Echinodorus tenellus.
Am I splitting hairs? Let me know and I'll knock it off!