Ambrosia confertiflora

Taxobox
name = "Ambrosia confertiflora"


image_width = 220px
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo = Asterales
familia = Asteraceae
subfamilia = Heliantheae
genus = "Ambrosia"
species = "A. confertiflora"
binomial = "Ambrosia confertiflora"
binomial_authority = DC.
synonyms ="Franseria confertiflora"
"Franseria strigulosa"
"Gaertneria tenuifolia"

"Ambrosia confertiflora" is a species of ragweed known by the common name weakleaf bur ragweed. It is native to much of northern Mexico and the southwestern United States as far east as Kansas and Oklahoma. It is a perennial herb reaching heights between 30 centimeters and nearly two meters with bristly, fuzzy green to brown erect stems. The multilobed fuzzy leaves have blades which can be nearly 16 centimeters long and are borne on petioles with lobed, winglike appendages. As in other ragweeds, the inflorescence has staminate (male) and pistillate (female) flower heads. The pistillate heads yield one or two fruits which are burrs up to half a centimeter long and covered in short spines.

External links

* [http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,648,654 Jepson Manual Treatment]
* [http://plants.usda.gov/java/profile?symbol=AMCO3 USDA Plants Profile]
* [http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Ambrosia+confertiflora Photo gallery]