Senna wislizeni

Taxobox
name = Wislizenus' Senna

---

image_width = 240px
image_caption = Flowering branch
status = G4
status_system = TNC
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
subclassis = Rosidae
unranked_ordo = Eurosids I
ordo = Fabales
familia = Fabaceae
subfamilia = Caesalpinioideae
tribus = Cassieae
subtribus = Cassiinae
genus = "Senna"
species = "S. wislizeni"
binomial = "Senna wislizeni"
binomial_authority = (A.Gray) Irwin & Barneby
synonyms ="Cassia wislizenii" A.Gray
"Palmerocassia wislizenii" (A.Gray) Britton & Rose

"Senna wislizeni" is commonly called Wislizenus' Senna or Shrubby Senna (formerly "cassia", but this generally refers to larger Cassiinae). Formerly in the "wastebin taxon" "Cassia sensu lato", it is now placed in the genus "Senna" or sometimes separated in "Palmerocassia" together with "Senna unijuga"ILDIS (2005)] .

This is a perennial, deciduous shrub native to Chihuahua and Hidalgo in Mexico; and Texas, New Mexico, and Arizona in the U.S. It is a desert plant with good heat and drought tolerance.

"S. wislizeni" can reach ten feet (3 meters) tall with a ten foot spread. It has compound foliage. In summer, especially late summer, it bears yellow flowers developing into long, flat, dark brown pods.

The species is named after Dr. F. A. Wislizenus, a botanist who studied Mexican flora in the mid-19th century.

There are several named varieties:
* var. "painteri" (Britton & Rose) H.S.Irwin & Barneby (= "Cassia wislizenii" A. Gray var. "painteri" (Britton & Rose) H.S.Irwin & Barneby, "Palmerocassia painteri" Britton & Rose)
* var. "pringlei" (Rose) H.S.Irwin & Barneby (= "Cassia morelensis" Greenm., "Cassia pringlei" Rose, "Palmerocassia pringlei" (Rose) Britton & Rose)
* var. "villosa" (Britton & Rose) H.S.Irwin & Barneby (= "Cassia wislizenii" A. Gray var. "villosa" (Britton & Rose) H.S.Irwin & Barneby, "Palmerocassia villosa" Britton & Rose) [Note that there also exists a "Senna villosa" (Mill.) H.S. Irwin & Barneby (formerly "Cassia villosa" Mill.) which is a different species altogether.]

Footnotes

References

* (2005): [http://www.ildis.org/ Genera "Cassia", "Palmerocassia", "Senna"] . Version 10.01, November 2005. Retrieved 2007-DEC-20.

External links

* [http://www.desert-tropicals.com/Plants/Fabaceae/Cassia_wislizenii.html Desert Tropicals.]
* [http://www.wildflower.org/plants/result.php?id_plant=SEWI3 Lady Bird Johnson Wildflower Center.]
* [http://www.ars-grin.gov/cgi-bin/npgs/html/taxon.pl?406330 GRIN Taxonomy for Plants]
* [http://plants.usda.gov/java/profile?symbol=SEWI3&photoID=cawi4_3h.jpgUSDA PLANTs Profile]
* [http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=505184 ITIS Report]