I planted this on the north side of my house in 2012. I purchased this from a general purpose nursery when I started looking for native to US plants. When asking for natives, the lady showed me this "Black-eyed Susan". I didn't pay attention to Latin names then.

It was only because someone recently told me Black-eyed Susans are a full sun plant, that I now question what this may be. It has grown and blossomed every year since I got it, but this year, the Wild Bergamot is nearly snuffing it out. I hope to transplant it to an area with more room.

But I would like to know its Latin name, if possible. I have Black-eyed Susan (Rudbeckia hirta) in our prairie patch and the leaves are smaller than this. I would say the length of this leaf is about three inches.



Here is one of the flowers that struggled to show its face.



Thank you for your help.

The leaves don't look like Rudbeckia; kinda thought maybe Helianthus Sunroots (Helianthus tuberosus) but leaves aren't right for that either. Maybe a type of Silphium?
http://garden.org/plants/searc...

I think it is Rudbeckia fulgida, http://plants.usda.gov/java/la...

@frostweed Josephine! The leaves looked too fat to me for Rudbeckia but it sure looks like it might be Black-Eyed Susan (Rudbeckia fulgida)

find a plant that has these stunted leaves




I don't think that it is Rudbeckia, leaves has a stem
Rudbeckia leaves not stem, leaves on the base taper

I think that the leaves of Rudbeckia fulgida are very variable.

Leaves can be variable in shape, size etc. Leaves can be lance shaped or ovate, lobed or unlobed, teeth or no teeth along the edges.

http://hvp.osu.edu/pocketgarde...
http://www.wildflower.org/plan...
https://plants.ces.ncsu.edu/pl...
https://gobotany.newenglandwil...
http://theplantencyclopedia.or...

frostweed said:I think that the leaves of Rudbeckia fulgida are very variable.

I agree! I have several types of Rudbeckia, and some have narrow leaves and some have wider leaves.

Maybe I found it
look the video
http://www.baumschule-horstman...
https://sandysplants.wordpress...

Thank you for the replies, everyone. So it really is a "Black-eyed Susan". These common names... At least I now have the correct Latin name. This brings a question...

With the Latin name being Rudbeckia fulgida var. sullvantii, what does "var." mean? I've seen the abbreviation for subspecies, so this must be something different. I looked at the USDA site and it lists this plant, but does not have a page for it.

I'm not sure but I think it means variety.

From Wikipedia:
var
see varietas.
varietas (variety in common usage, abbreviated as var.)
(Latin) in the Linnean hierarchy a rank below that of species, between the ranks of subspecies and form.

"var." means variety. USDA doesn't have a page for varieties, as far as i know. They only have a page for the main species.

the basic name Rudbeckia fulgida
Genus: Rudbeckia
species: fulgida (spec.)
lower grades :
subspecies - subsp.
varieta - var.
form - f.

Watch - sp. - all species

frostweed said:"var." means variety. USDA doesn't have a page for varieties, as far as i know. They only have a page for the main species.

http://www.ars-grin.gov/cgi-bi...
http://www.ars-grin.gov/cgi-bi...

Yes they have then listed but they don't have a regular page for varieties, that is what I meant.

I don't know what you mean, I think you're wrong variety for the cultivar ?

for example, you may create a theoretical
Rudbeckia fulgida subsp. fulgida var. sullvantii f. alba cultivar Josephine
then the name will be Rudbeckia fulgida 'Josephine'
the cultivar is not a variety or form,
subspecies - subsp.,varieta - var.,form - f. they are naturally created
the cultivar is artificially cultivate - by selecting the random variation, or targeted crossing, mostly differ just paint flowers

Well, you lost me, but if you say I am wrong then I probably am, I guess we can't be right all the time, sorry

Excellent explanation! I've never paid too much attention to those abbreviations. Now if I can just remember them.

I'm sorry, I don't understand