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Ambrosia cordifolia 
Summary
Ambrosia cordifolia, called the Tucson bur ragweed,[3] is a North American species of plant in the family Asteraceae. It is native to northern Mexico (Sonora, Sinaloa, San Luis Potosí, Guanajuato, Baja California Sur) and the State of Arizona in the United States.[4][5][6]
| Ambrosia cordifolia | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Ambrosia |
| Species: | A. cordifolia
|
| Binomial name | |
| Ambrosia cordifolia (A. Gray) W.W. Payne
| |
| Synonyms[1][2] | |
| |
Ambrosia cordifolia is a shrub up to 50 cm (20 inches) tall. Leaves are triangular or heart-shaped. Flower heads are small and inconspicuous, as the plant is wind-pollinated. The heads develop into spiny burs as the seeds ripen.[7]
The reference to the Arizona city of Tucson in the common name refers to the species' first discovery by Cyrus G. Pringle in the mountains near Tucson in 1884.[8]
References edit
- ^ Tropicos, Ambrosia cordifolia (A. Gray) W.W. Payne
- ^ The Plant List Ambrosia cordifolia (A.Gray) W.W.Payne
- ^ Southeastern Arizona Wildflowers and Plants, Ambrosia cordifolia – Tucson Bur Ragweed
- ^ Biota of North America Program 2014 county distribution map
- ^ Tropicos, specimen listing for Ambrosia cordifolia (A. Gray) W.W. Payne
- ^ Payne, Willard William 1964. Journal of the Arnold Arboretum 45(4): 421
- ^ Flora of North America, Vol. 21 Page 14 Ambrosia cordifolia (A. Gray) W. W. Payne
- ^ Gray, Asa 1884. Synoptical Flora of North America 1(2): 445 as Franseria cordifolia
External links edit
- Pollen Library, Tucson Burr-Ragweed (Ambrosia cordifolia)
- Cabeza Prieta Natural History Association, Sonoran Desert Plants, Ambrosia cordifolia (Heart-leaf Bur-sage)