Wildflowers: yellow flowers, fall bloomers

location: central arkansas
along roadside, and undisturbed fields
sunny locations

blooming now- end of september

yellow flowers, with brown center

please help identify- thanks

 

Looks like a Rudbeckia.

 

the leaves look different than on a rudbeckia, they are thin blades - I will need to look at the plant again for a better description

 

Helianthus angustifolius

 

my plant is less than 3 ft, maybe a different species?

the helianthus a. gets 5 to 6 ft tall, I have also seen it along some other roadsides, it really stands out tall - I need to get out and take more pics and make a comparison

 

I added more pictures, pulled out one plant, it's about 4 ft, most of the plants grow along a sloped ditch, and appear less tall because they did not grow upright but slanted -
the texture of the leaves, stem fell rough like on a sunflower

 

Just a suggestion... Rudbeckia hirta var angustifolia.

http://www.wildflower.org/gallery/result.php?id_image=26059

Yellow daisy things are difficult.

I was choosing pic... meanwhile you posted with new pics. This one has leaves that are too long. Please ignore this suggestion!

 

I think the post from tipularia fits: narrow leafed sunflower or helianthus a.

 

Leaf photos not in original post.

 

sorry - will include with next new plant id

 

silver surfer,
thanks for your research
will include leaf pictures if available with the next plant