Compilation
Sisyrinchium alpestre

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Name

Identification
Sisyrinchium alpestre Bicknell, E.P. 1899 [family IRIDACEAE ] (stored under name); Verified by Not on sheet,
Related name
  • Sisyrinchium alpestre

Flora

Entry for Sisyrinchium montanum Greene var. montanum [family IRIDACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 26,
Names
Sisyrinchium montanum Greene var. montanum [family IRIDACEAE]
Sisyrinchium alpestre E. P. Bicknell [family IRIDACEAE]
Sisyrinchium heterocarpum E. P. Bicknell [family IRIDACEAE]
Treatment Author(s)
Anita F. Cholewa
Douglass M. Henderson†
Information
Plants pale green to olive when dry. Spathe: outer 36–76 mm, 14–46 mm longer than inner, connate basally 1–3.5 mm; inner with hyaline margins ending 0.9–4.3 mm proximal to green apex. 2n = 96.
Phenology
mar-may (spring), jun-aug (summer)
Altitude range
0–3100 m;
Distribution
USA Colo.USA Conn.USA IdahoUSA Ind.USA Kans.USA MaineUSA Mass.USA Mich.USA Minn.USA Mont.USA Nebr.USA N.H.USA N.J.USA N.Mex.USA N.Y.USA N.Dak.USA Pa.USA R.I.USA S.Dak.USA Vt.USA Wis.USA Wyo.Canada Alta.Canada B.C.Canada Man.Canada N.B.Canada Nfld. and Labr. (Labr.)Canada N.W.T.Canada N.S.Canada Ont.Canada P.E.I.Canada Que.Canada Sask.Canada Yukon
Discussion
Populations of var. montanum in Kansas and Nebraska have an unusually high proportion of branched-stem plants mixed with simple-stemmed ones—even within the same clump (Great Plains Flora Association 1986). Although branched stems are found occasionally elsewhere in the taxon’s range, the high incidence in this region is unusual and may be related to the distributional approach of S. angustifolium, with which it often has been confused.
Canadian populations of var. montanum tend to have narrower bracts and other less pronounced interspecific differences than do populations elsewhere. These populations can easily be confused with S. mucronatum, which consistently has some purple in the spathes and usually has a shorter outer spathe, and with S. septentrionale, which lacks emarginate outer tepals and has a very long and narrow outer spathe.

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