Vascular Plants of the Gila Wilderness

Presented in Association with the
Western New Mexico University Department of Natural Sciences

Hymenothrix wislizeni Gray
(Transpecos Thimblehead, Transpecos Hymenothrix)


Family: Asteraceae

Status: Native

Synonyms:
None

Hymenothrix wislizeni is a erect roadside annual. The yellow flowerheads are arranged in dense mostly terminal clusters with 10 to 20 heads per cluster. Each flowerhead has about 5 ray flowers, and considerably more disc flowers. Both the rays and the disc are yellow. The effect is that of a yellow pinwheel. The leaves are highly dissected with linear segments. The achenes are pubescent and the pappus consists of about a dozen awned hyaline scales.
Please click on an image for a larger file.



Hymenothrix wislizeni, photo Russ Kleinman, Burro Mtns., Mangas Cyn. Road, July 14, 2007



Hymenothrix wislizeni, growth habit, photo Russ Kleinman, Burro Mtns., US90 near WD Ranch Road, July 3, 2009



Hymenothrix wislizeni, closeup inflorescences, photo Russ Kleinman, Burro Mtns., US90 near WD Ranch Road, July 3, 2009



Hymenothrix wislizeni, closeup of dissected leaf with linear segments, photo Russ Kleinman, Burro Mtns., US90 near WD Ranch Road, July 3, 2009



Hymenothrix wislizeni, 1x field macro of cypselae, photo Russ Kleinman, Burro Mtns., US90 at Tyrone Thompson Road, July 23, 2009


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