Peganum

Peganum L. is a genus under the recently separated family Nitrariaceae.^[1] Formerly it used to be included in the family Zygophyllaceae.

Peganum
Syrian rue (Peganum harmala)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Sapindales
Family:	Nitrariaceae
Genus:	Peganum L.
Species
See text

Phylogeny and Species

The genus has around five species, occurring in warm temperate to subtropical regions across the world:

• Peganum harmala L. (Harmal or Syrian rue) — Mediterranean region east to China
• Peganum mexicanum Gray — Mexico
• Peganum multisectum (Maxim.) Bobrov — China, Mongolia
• Peganum nigellastrum Bunge — China
• Peganum texanum M.E.Jones — southern North America

Phylogenetic data suggests the following relationships:^[2][3]

	Nitraria (outgroup)
Peganum	P. multisectum P. harmala P. nigellastrum

References

1. Sheahan, M.C.; Chase, M.W. (1996). "A phylogenetic analysis of Zygophyllaceae R. Br. based on morphological anatomical and rbcL DNA sequence data". Bot. J. Linn. Soc. 122 (4): 279–300. doi:10.1111/j.1095-8339.1996.tb02077.x.
2. Zhang; Chi (2019). "The complete chloroplast genome of Peganum harmala". Mitochondrial DNA Part B. 4 (1): 1784–1785. doi:10.1080/23802359.2019.1612289.
3. Zhao; Wang; Branford-White; Wang (2011). "Classification and differentiation of the genus Peganum indigenous to China based on chloroplast trnL-F and psbA-trnH sequences and seed coat morphology". Plant Biology. 13 (6): 940–947. Bibcode:2011PlBio..13..940Z. doi:10.1111/j.1438-8677.2011.00455.x. PMID 21972911.

Media related to Peganum harmala at Wikimedia Commons