En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Differences between Ratibida columnifera and Ratibida peduncularis

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.

Need help with plant identification, visit the plant identification page.
 
rate this answer
1 rating

Thursday - June 03, 2010

From: Nederland, TX
Region: Southwest
Topic: Plant Identification
Title: Differences between Ratibida columnifera and Ratibida peduncularis
Answered by: Nan Hampton

QUESTION:

How do you tell the difference between Ratibida columnifera and Ratibida peduncularis. On NPIN columnifera has red and penduncularis is solid yellow, but I have seen pictures listed as columnifera that are solid yellow.

ANSWER:

The flower color for the ray petals of both species can range from entirely yellow to entirely reddish-brown. The chief easily recognizable difference between Ratibida columnifera (upright prairie coneflower) and Ratibida peduncularis (naked Mexicanhat), according to The Manual of the Vascular Plants of Texas by Correll and Johnston, is that Ratibida columnifera (syn. Ratibida columnaris) has leaves all the way up the stem to right below the blossom and Ratibida peduncularis has the leaves concentrated at the base of the plant with the majority of the stem bare, thus its common name of 'naked Mexicanhat'. They do say that the plants may intergrade, however.  Rare Plants of Louisiana has a very good photo of R. peduncularis showing the leaves all occurring at the very bottom of its stalk.  You can see more detailed characteristics with flower and fruit size measurements that differ between the two from Flora of North American online (eFloras) and you can read the individual descriptions of R. columnifera and R. peduncularis from eFloras. This source also gives a reference that indicates that hybridization likely occurs among the species of this genus.


Ratibida columnifera

Ratibida columnifera

Ratibida peduncularis

 

 

More Plant Identification Questions

Identification of plant in Menard TX
April 16, 2010 - We recently purchased 40 acres in Menard Texas on the San Saba River. There is a plant that looks like a fern that is all over the river bottom. It looks like the foliage on a carrot and they are al...
view the full question and answer

Seeds of Castilleja purpurea
April 12, 2012 - The seed photo for Castilleja purpurea is incorrect; seeds are black and poppyseed size.
view the full question and answer

Was my grandmother growing a Honeysuckle Bush in Middleton, Idaho?
May 17, 2010 - I would like to know the name of the flowering bush that grew in the backyard of my grandmother's house in Middleton, Idaho. I remember it to be purple in color and had petals with what I used to ca...
view the full question and answer

Identification of tree along Austin highways
April 01, 2011 - I am trying to identify a large tree seen along many Austin Highways. The best ID can find is Western Soapberry, but the articles all specify white blooms. The trees I see have purple clusters of bloo...
view the full question and answer

Identification of tall dry, stalk plant in Central Texas
January 19, 2011 - I'm trying to identify a plant from my childhood in Central Texas, as I'd like to evaluate its potential as a biofuel crop. It is a stalk-plant, growing quite tall, 7-8' on average, with knobbed...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.

Bibliography

Manual of the Vascular Plants of Texas (1979) Correll, D. S. & M. C. Johnston

Search More Titles in Bibliography

E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center