Erigeron strigosus [Prairie Fleabane]: Another Instance

[dancingcat]

Frary, S.C. (2022) Another Instance of Erigeron strigosus Muhl. ex Wild (Asteraceae) Prairie Fleabane. Photographed in ultraviolet and visible light.  LINK

 

Collected 13 May 2022, roadside, Waxahachie TX, USA.  Voucher deposition: Botanical Research Institute of Texas Herbarium (BRIT) S. C. Frary [134].

 

Other Common Names:  Daisy Fleabane, Whitetop, Rough Fleabane

 

Comment:  Very common roadside and prairie flower, here blooming with Queen Anne’s Lace (Daucus carota), and Indian Blanket (Gaillardia pulchella) in waste ground and overgrown pastures.  Small ½” wide daisy-like flowers on tall slender stems (about 1-2 feet).  The short, appressed hairs on the stems are indicative of this species.  There are many similar species of Erigeron called by similar common names, but this one is ubiquitous in north Texas.  The UV image is almost entirely dark.

 
Reference:
1. George M. Diggs Jr., Barney L. Lipscomb, Robert J. O'Kennon (1999) Shinners and Mahler's Illustrated Flora of North Central Texas. Erigeron strigosus page 352. Published by Botanical Research Institute of Texas, Fort Worth. Online in PDF format at Illustrated Flora of North Texas Online.

2. Blum, A.G. (2012, 2016) Erigeron strigosus Muhl. ex Willd. (Asteraceae) Rough Fleabane. Flowers photographed in ultraviolet, visible and infrared light. Bee vision simulation included. http://www.ultravioletphotography.com/content/index.php/topic/52-erigeron-strigosus-rough-fleabane/
 
Equipment [Olympus EM1mk2-broadband + Olympus 30mm f/3.5 macro]
 
Visible Light [f/11, iso 640, 2”, Kolari UV/IR Cut HotMirror Pro 2 filter, ambient indoor room light.]

 

 

Ultraviolet Light [f/11, iso 640, 15”, BaaderU filter, Adaptalux 2x UV LED.]  Note that lighting by LED produces a nearly monochrome image.

 

[colinbm]

Good detail dancing cat

[Andy Perrin]

This flower shows light petals and a dark center in SWIR (1500-1600nm):