Pteropyrum

Species of Pteropyrum are shrubs. The few leaves may be arranged alternately or in bundles (fascicled). The ochrea is short. The flowers are small and bisexual, with five tepals, two outer and three inner, the three inner clasping the fruit when it forms. There are eight stamens. The ovary is three-angled with three styles. The fruit has three broad wings.

The genus was erected by Hippolyte François Jaubert and Édouard Spach in 1844. It is placed in the subfamily Polygonoideae, tribe Calligoneae, along with its sister genus Calligonum.

{{As of|2019|March}}, sources varied considerably in the number of species assigned to the genus. Plants of the World Online accepted the following two species:

• Pteropyrum aucheri Jaub. & Spach (synonym Pteropyrum ericoides Boiss.)
• Pteropyrum scoparium Jaub. & Spach

Other sources listed more species, some with an "unresolved" status. These include:

• Pteropyrum olivieri Jaub. & Spach (synonyms Pteropyrum gracile Boiss., Pteropyrum griffithii Meisn.)
• Pteropyrum naufelum Al-Khayat

{{Reflist|refs=

{{citation |title=Species Details: Pteropyrum aucheri Jaub. & Spach |website=Catalogue of Life: 2018 Annual Checklist |url=http://www.catalogueoflife.org/annual-checklist/2018/details/species/id/dc40c32b5c400273df19679c4f768f2e |access-date=2019-03-17}}

{{citation |title=Species Details: Pteropyrum olivieri Jaub. & Spach |website=Catalogue of Life: 2018 Annual Checklist |url=http://www.catalogueoflife.org/annual-checklist/2018/details/species/id/e84e7cca83c3f81c968cbb4ddc5266c2 |access-date=2019-03-17}}

{{citation |first1=M. |last1=Qaiser |contribution=Pteropyrum |contribution-url=http://www.tropicos.org/Name/40019979?projectid=32 |access-date=2019-03-17 |title=Flora of Pakistan (online) |publisher=Missouri Botanical Garden }}

{{citation |title=Plant Name Details for Pteropyrum Jaub. & Spach |work=The International Plant Names Index |url=http://www.ipni.org/ipni/idPlantNameSearch.do?id=32574-1 |access-date=2019-03-09 }}

{{citation |title=Pteropyrum Jaub. & Spach |work=Plants of the World Online |publisher=Royal Botanic Gardens, Kew|url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:32574-1 |access-date=2019-03-09 }}

{{Citation |last1=Schuster |first1=Tanja M. |last2=Reveal |first2=James L. |last3=Bayly |first3=Michael J. |last4=Kron |first4=Kathleen A. |date=2015 |title=An updated molecular phylogeny of Polygonoideae (Polygonaceae): Relationships of Oxygonum, Pteroxygonum, and Rumex, and a new circumscription of Koenigia |journal=Taxon |volume=64 |issue=6 |pages=1188–1208 |doi=10.12705/646.5 |name-list-style=amp }}

{{Citation |last1=Tavakkoli |first1=Solmaz |last2=Kazempour Osaloo |first2=Shahrokh |last3=Maassoumi |first3=Ali Asghar |date=2010 |title=The Phylogeny of Calligonum and Pteropyrum (Polygonaceae) Based on Nuclear Ribosomal DNA ITS and Chloroplast trnL-F Sequences |journal=Iranian Journal of Biotechnology |volume=8 |issue=1 |pages=7–15 |url=http://www.ijbiotech.com/article_7122.html |access-date=2019-03-18 |name-list-style=amp }}

{{citation |title=Search results for Pteropyrum|work=The Plant List |url=http://www.theplantlist.org/tpl1.1/search?q=Pteropyrum |access-date=2019-03-17 }}

{{Citation|title=Search for Pteropyrum|website=Tropicos|url=http://www.tropicos.org/NameSearch.aspx?name=Pteropyrum|publisher=Missouri Botanical Garden|access-date=2019-03-17}}

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Category:Polygonoideae

Category:Polygonaceae genera

Category:Flora of Iran

Category:Flora of Oman

Category:Flora of the Gulf States

Category:Taxa named by Hippolyte François Jaubert

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