Salix humilis

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Distribution Map: Based on vouchered plant specimens only. View county names by placing the mouse cursor over a particular county.

Species Distribution Map
Family:SALICACEAE
Species:Salix humilis Marshall
Common Name:Prairie Willow; Dwarf Willow; Scrub Willow
Habitat:**
Associated Ecological Communities:**
Growth Habit:Shrub
Duration:Perennial
Category:Vascular
USDA Symbol:SAHU2
Plant Notes:Prairie Willow is a native deciduous shrub in the Willow family (Salicaceae). It occurs in central and northern Alabama. Prairie Willow grows in deciduous forest, along streams, and in prairie margins, usually in areas with calcareous soils. Prairie Willow is a small clonal shrub growing from 3-9 feet in height. It is often thicket forming. The young stems are red-brown, yellow-brown, or greenish brown in color and moderately to very densely pubescent. Older stems have dark reddish-brown bark. The leaves are alternate, petiolate, oblong to elliptic or obovate in outline with entire, crenate, or sinuate margins. The margins are often revolute (curved downward). The upper surface of the leaf is medium green in color with scattered hairs and the lower surface of the leaf is pubescent with white hairs. Prairie Willow is dioecious with separate male and female plants. Flowers are produced in catkins in the early spring before the leaves. The male floret consists of a pair of stamens and a hairy bract and the female floret consists of an ovary and a hairy bract. The fruit is a capsule that splits to release many tiny seeds embedded in white cottony hairs. Prairie Willow is listed as an S2/S3 species in Alabama (S2 - Typically 6 to 20 occurrences, few remaining individuals, or factors demonstrably making it very vulnerable in the state; S3 - Typically 21 to 100 occurrences, or limited acreage in the state) and globally as a G5 species (Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery).—A. Diamond.
Taxonomic Notes:**
Status:Native, FACU (NWI), S2S3 (State Rank), G5 (Global Rank)
References:**

** Not applicable or data not available.

Classification

FamilySALICACEAE - Willow family
Genus Salix
Species Salix humilis Marshall - Prairie Willow; Dwarf Willow; Scrub Willow

Citation

Citation Salix humilis Marshall, Arbust. Amer. 140. 1785.
Basionym: **
Type: **

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Usionis humilis (Marshall) Rafinesque, Alsogr. Amer. 17. 1838.Salix humilis Marshall 1785. 
Salix alpina Salix alpina Walter, Fl. Carol. 243. 1788. Without data, Fraser/Walter 93-C (lectotype: BM). Lectotypified by S. F. Blake, Rhodora 17: 136. 1915; D. B. Ward, J. Bot. Res. Inst. Texas 1: 419. 2007.
Salix conifera Salix conifera Muhlenberg, Ges. Naturf. Freunde Berlin Neue Schriften 4: 240. 1803. PENNSYLVANIA: Lancaster Co.: Lancaster, s.d., Muhlenberg 567 (holotype: PH).
Salix humilis var. grandifolia Salix humilis Marshall, var. grandifolia (Andersson) Andersson, in de Candolle, Prodr. 16(2): 236. 1868.Salix humilis Marshall, forma grandifolia Barratt ex Andersson 1867; Salix conferta Muhlenberg 1803, non Wangenheim 1787. 
Salix humilis var. keweenawensis Salix humilis Marshall, var. keweenawensis Farwell, Rep. Michigan Acad. Sci. 6: 206. 1904. MICHIGAN: Keweenaw Co.: "Bluffs between N. A. mine and No. 4 shaft house", 18 Jun 1883, Farwell 14 (lectotype: BLH). Lectotypified by McVaugh et al., Cranbrook Inst. Sci. Bull. 34: 65. 1953.
Salix humilis var. longifolia Salix humilis Marshall, var. longifolia Andersson, in de Candolle, Prodr. 16(2): 236. 1868, nom. inadmiss.Salix humilis Marshall, forma longifolia Andersson 1867; Salix humilis Marshall 1785. 
Salix humilis var. rigidiuscula Salix humilis Marshall, var. rigidiuscula (Andersson) B. L. Robinson & Fernald ex C. R. Ball, in Lundell, Fl. Texas 3(6): 390. 1961.Salix humilis Marshall, forma rigidiuscula Andersson 1867. 
Salix muhlenbergiana var. angustifolia Salix muhlenbergiana Willdenow, var. angustifolia Barratt, Salices Amer. Sp. 1. 1840. CONNECTICUT: Middlesex Co.: Middletown, Aug 1834, Barratt s.n. (holotype: NY).
Salix repanda Salix repanda Rafinesque, Alsogr. Amer. 17. 1838. FLORIDA
Salix humilis var. hyporhysa Salix humilis Marshall, var. hyporhysa Fernald, Rhodora 48: 45. 1946. NEW JERSEY: Ocean Co.: Manahawkin, 23 Jul 1923, Long 28011 (holotype: GH).

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Autauga, Barbour, Bibb, Bullock, Butler, Clay, Cleburne, Crenshaw, Henry, Jackson, Lauderdale, Macon, Montgomery, Pike, Russell, Shelby, Talladega, Tallapoosa

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: ALNHS, AUA, JSU, NY, TROY, UNA, UWAL

Range of years during which specimens were collected: 1893 - 1997

Barcode / Accession No. County Coll. Date Collector &
Collection No.		 Herbarium &
Herbarium Name Used		 Image
TROY000035681 Butler 12 Sep 2012 Diamond, Alvin R.
23345		 TROY
Salix humilis Marshall
JSU132970 Jackson 20 Aug 1998 Brodeur, Kristin R.
1349		 JSU
Salix humilis Marshall
AUA_ACC_52826 Bullock 1 Apr 1992 Diamond, Alvin R.
8052		 AUA
Salix Humilis Marsh.
AUA_ACC_40885 Clay 18 Apr 1980 Whetstone, R.David
9851		 AUA
Salix Humilis Marsh.
JSU132966 Clay 9 Mar 1981 Whetstone, R. David
10426		 JSU
Salix humilis Marshall
AUA_ACC_72000 Russell 31 May 2007 Schotz, Alfred
2055		 AUA
Salix Humilis Marsh.
ALNHS00006434 Bullock 22 May 2019 Barger, T. Wayne
SP#4418		 ALNHS
Salix humilis Marsh.
TROY000035288 Bullock 12 Jun 2012 Diamond, Alvin R.
23084		 TROY
Salix humilis Marshall
JSU132969 Jackson 2 Apr 1999 Brodeur, Kristin R.
1673		 JSU
Salix humilis Marshall
AUA_ACC_52825 Barbour 1 Apr 1992 Diamond, Alvin R.
8051		 AUA
Salix Humilis Marsh.
UWAL0002814 Bullock 21 Apr 2011 Dykes, Bailee
17		 UWAL
Salix humilis Marsh.
AUA_ACC_52340 Pike 25 Feb 1992 Diamond, Alvin R.
7913		 AUA
Salix Humilis Marsh.
UNA00063652 Bibb 28 Mar 2004 Schotz, Alfred
1927		 UNA
Salix humilis Marsh.
JSU132968 Cleburne 28 Apr 1976 Atkinson, Tim A.
1433		 JSU
Salix humilis Marshall
AUA_ACC_52458 Butler 20 May 1994 Diamond, Alvin R.
9176		 AUA
Salix Humilis Marsh.
UNA00012056 Lauderdale 26 Apr 1893 Wilson, M.C.
s.n.		 UNA
Salix humilis Marsh.
TROY000045409 Russell 31 May 2007 Schotz, Alfred
2055		 TROY
Salix humilis Marshall
JSU132973 Tallapoosa 27 Mar 1979 Whetstone, R. David
10561		 JSU
Salix humilis Marshall
UNA00059240 Bullock 08 Aug 2002 Diamond, Alvin R.
13528		 UNA
Salix humilis Marsh.
UNA00058353 Crenshaw 24 Mar 2002 Diamond, Alvin R.
12983		 UNA
Salix humilis Marsh.
UWAL0012436 Butler 12 Sep 2012 Diamond, Alvin R.
23345		 UWAL
Salix humilis Marshall
TROY000008856 Pike 16 Jun 2000 Diamond, Alvin R.
11728		 TROY
Salix humilis Marshall
AUA_ACC_50842 Montgomery 21 Jun 1992 Diamond, Alvin R.
8334		 AUA
Salix Humilis Marsh.
ALNHS00004999 Bullock 01 Jun 2017 Barger, T. Wayne
SP#3128		 ALNHS
Salix humilis Marsh.
JSU132965 Clay 18 Apr 1980 Whetstone, R. David
9851		 JSU
Salix humilis Marshall
AUA_ACC_50847 Crenshaw 5 Jul 1992 Diamond, Alvin R.
8357		 AUA
Salix Humilis Marsh.
JSU132974 Tallapoosa 27 Mar 1979 Whetstone, R. David
10561		 JSU
Salix humilis Marshall
ALNHS00005872 Bullock 20 Mar 2018 Peters, Ashley
SP#3619		 ALNHS
Salix humilis Marsh
UWAL0011037 Bullock 12 Jun 2012 Diamond, Alvin R.
23084		 UWAL
Salix humilis Marshall
TROY000023661 Butler 30 Aug 2007 Diamond, Alvin R.
17955		 TROY
Salix humilis Marshall
TROY000008854 Crenshaw 24 Mar 2002 Diamond, Alvin R.
12983		 TROY
Salix humilis Marshall
JSU132971 Russell 27 Jun 1978 Kral, Robert
62190		 JSU
Salix humilis Marshall
UWAL0016065 Henry 11 Mar 2014 Diamond, Alvin R.
24831		 UWAL
Salix humilis Marshall
AUA_ACC_40884 Cleburne 21 Apr 1980 Whetstone, R.David
9861		 AUA
Salix Humilis Marsh.
TROY000039085 Henry 11 Mar 2014 Diamond, Alvin R.
24831		 TROY
Salix humilis Marshall
AUA_ACC_50906 Macon 14 Aug 1991 Diamond, Alvin R.
7695		 AUA
Salix Humilis Marsh.
UWAL0034949 Clay 03 Jun 2012 Webb, Wayne K.
15		 UWAL
Salix humilis Marsh
UNA00045986 Barbour 27 May 1998 MacDonald, John R.
11290		 UNA
Salix humilis Marsh.
UWAL0004007 Henry 18 May 2009 Diamond, Alvin R.
20713		 UWAL
Salix humilis Marsh.
UWAL0004006 Butler 30 Aug 2007 Diamond, Alvin R.
17995		 UWAL
Salix humilis Marsh.
ALNHS00007640 Cleburne 21 JUL 2021 Barger, T. Wayne
SP#5605		 ALNHS
Salix humilis Marsh.
AUA_ACC_51814 Barbour 25 Feb 1991 Diamond, Alvin R.
7225		 AUA
Salix Humilis Marsh.
UNA00047401 Barbour 14 Jun 1997 MacDonald, John R.
10669		 UNA
Salix humilis Marsh.
JSU132967 Cleburne 21 Apr 1980 Whetstone, R. David
9861		 JSU
Salix humilis Marshall
UWAL0048066 Bullock 21 Mar 2018 Soehren, Eric C.
541		 UWAL
Salix humilis Marshall
AUA_ACC_55635 Russell 24 Feb 1991 Diamond, Alvin R.
7220		 AUA
Salix Humilis Marsh.
TROY000008853 Bullock 08 Aug 2002 Diamond, Alvin R.
13528		 TROY
Salix humilis Marshall
NY02451650 Tallapoosa 27 Mar 1979 R. D. Whetstone
10561		 NY
Salix humilis Marshall
AUA_ACC_53107 Russell 25 Feb 1991 Diamond, Alvin R.
7224		 AUA
Salix Humilis Marsh.
TROY000023530 Talladega 16 Aug 1981 Kral, Robert
67668		 TROY
Salix humilis Marshall
UNA00057484 Autauga 01 Mar 2002 Haynes, Robert R.
10219		 UNA
Salix humilis Marsh.
UWAL0002792 Pike 04 Mar 2011 Diamond, Alvin R.
21761		 UWAL
Salix humilis Marsh.
TROY000032784 Bullock 21 Apr 2011 Dykes, Bailee
17		 TROY
Salix humilis Marshall
JSU132972 Shelby 4 Sep 1998 Brodeur, Kristin R.
1365		 JSU
Salix humilis Marshall
TROY000028359 Henry 18 May 2009 Diamond, Alvin R.
20713		 TROY
Salix humilis Marshall
UNA00056508 Russell 24 Feb 1991 Diamond, Alvin R.
7220		 UNA
Salix humilis Marsh.
AUA_ACC_55521 Crenshaw 14 Mar 1995 Diamond, Alvin R.
9497		 AUA
Salix Humilis Marsh.
TROY000008855 Crenshaw 16 Jul 2000 Diamond, Alvin R.
11845		 TROY
Salix humilis Marshall
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