Astragalus laxmannii

Astragalus laxmannii
	A silvery blue feeding on flowers in the Sand Lake Wetland Management District
	In Wyoming
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fabales
Family:	Fabaceae
Subfamily:	Faboideae
Genus:	Astragalus
Species:	A. laxmannii
Binomial name
	Astragalus laxmannii; Jacq.
Synonyms
	List Astragalus adsurgens Pall.; Astragalus adsurgens var. albifolius Blank.; Astragalus adsurgens f. chandonnetii (Lundell) B.Boivin; Astragalus adsurgens var. fujisanensis (Miyabe & Tatew.) Kitag.; Astragalus adsurgens var. laxmannii (Jacq.) Trautv.; Astragalus adsurgens f. leucantha Takeda; Astragalus adsurgens subsp. oreogenus (Jurtzev) Vorosch.; Astragalus adsurgens var. paucijugus E.Peter; Astragalus adsurgens var. pauperculus Blank.; Astragalus adsurgens var. prostratus DC.; Astragalus adsurgens subsp. robustior (Hook.) S.L.Welsh; Astragalus adsurgens var. robustior Hook.; Astragalus adsurgens var. tananaicus (Hultén) Barneby; Astragalus adsurgens subsp. viciifolius S.L.Welsh; Astragalus austrosibiricus Schischk.; Astragalus chandonnetii Lundell; Astragalus crandallii Gand.; Astragalus fujisanensis Miyabe & Tatew.; Astragalus gmelinii Scop.; Astragalus inopinatus Boriss.; Astragalus inopinatus subsp. fujisanensis (Miyabe & Tatew.) Kitag.; Astragalus inopinatus subsp. oreogenus Jurtzev; Astragalus inopinatus subsp. substepposus Jurtzev; Astragalus karoi Freyn; Astragalus laxmannii Nutt.; Astragalus laxmannii var. adsurgens (Pall.) Kitag.; Astragalus laxmannii subsp. fujisanensis (Miyabe & Tatew.) Kitag.; Astragalus laxmannii var. robustior (Hook.) Barneby & S.L.Welsh; Astragalus laxmannii var. tananaicus (Hultén) Barneby & S.L.Welsh; Astragalus longispicatus Ulbr.; Astragalus marianus C.Huber; Astragalus microphyllus Georgi; Astragalus nitidus Douglas ex Hook.; Astragalus nitidus var. robustior (Hook.) M.E.Jones; Astragalus oostachys E.Peter; Astragalus oreogenus (Jurtzev) Knjaz.; Astragalus prostratus Fisch. ex Turcz.; Astragalus semibilocularis Fisch. ex Bunge; Astragalus semibilocularis DC.; Astragalus striatus Nutt.; Astragalus sulphurescens Rydb.; Astragalus sulphurescens var. pinicola E.H.Kelso; Astragalus syriacus Pall. ex Ledeb.; Astragalus tananaicus Hultén; Astragalus viciifolius Hultén; Phaca adsurgens (Pall.) Piper; Phaca laxmannii (Jacq.) Medik.; Solenotus adsurgens (Pall.) Steven; Tragacantha adsurgens (Pall.) Kuntze; Tragacantha laxmannii (Jacq.) Kuntze; Tragacantha semibilocularis Kuntze; ;

Astragalus laxmannii, the standing milkvetch, Tanana milkvetch, or Laxmann's milkvetch, is a species of flowering plant in the family Fabaceae.^[2] It is native to Kazakhstan, Siberia, Mongolia, China, Korea, Japan (where it is called ムラサキモメンヅル (murasaki momenjiru - lit. purple cotton vine)), Canada, and the northwestern and north-central United States.^[1] A perennial reaching 16 in (41 cm), it is typically found in dry soils with little organic content in otherwise wetter areas.^[2]^[3] Asian populations were previously considered to be a separate species, Astragalus adsurgens Pall..^[4]

Close-up of flowers
Undersides of leaflets
Pods

Subtaxa

The following subspecies are accepted:^[1]

Astragalus laxmannii subsp. laxmannii – Kazakhstan, Siberia, the Russian Far East (except Sakhalin, the Kurils, and Kamchatka), Mongolia, China, Korea, Japan
Astragalus laxmannii subsp. robustior (Hook.) Podlech – Canada (but not Nunavut or east of Ontario), northwestern and north-central USA (but not Kansas, Oklahoma, Wisconsin, Illinois, or Missouri), and Utah and New Mexico
Astragalus laxmannii subsp. viciifolius (S.L.Welsh) Podlech – east-central Alaska, southern Yukon

References

^ ^a ^b ^c "Astragalus laxmannii Jacq". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 27 August 2025.
^ ^a ^b Joseph A. Marcus (1 November 2022). "Astragalus laxmannii". Plant Database. Lady Bird Johnson Wildflower Center. Retrieved 27 August 2025.
^ "斜茎黄耆 xie jing huang qi". Flora of China. Missouri Botanical Garden & Harvard University Herbaria. 2025. Retrieved 27 August 2025. 10-60 cm tall
^ Choi, In-Su; Kim, So-Young; Choi, Byoung-Hee (2015). "A taxonomic revision of Astragalus L. (Fabaceae) in Korea". Korean Journal of Plant Taxonomy. 45 (3): 227–238. Bibcode:2015KJPT...45..227C. doi:10.11110/kjpt.2015.45.3.227.

[POWO_25081-2-1] "Astragalus laxmannii Jacq". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 27 August 2025.

[LBJWC_ASLA27-2] Joseph A. Marcus (1 November 2022). "Astragalus laxmannii". Plant Database. Lady Bird Johnson Wildflower Center. Retrieved 27 August 2025.

[FoC_250094292-3] "斜茎黄耆 xie jing huang qi". Flora of China. Missouri Botanical Garden & Harvard University Herbaria. 2025. Retrieved 27 August 2025. 10-60 cm tall

[4] Choi, In-Su; Kim, So-Young; Choi, Byoung-Hee (2015). "A taxonomic revision of Astragalus L. (Fabaceae) in Korea". Korean Journal of Plant Taxonomy. 45 (3): 227–238. Bibcode:2015KJPT...45..227C. doi:10.11110/kjpt.2015.45.3.227.

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