Pilea pumila

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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:URTICACEAE
Species:Pilea pumila (L.) A. Gray
Common Name:Canadian Clearweed; Green Fruit Clearweed; Coolwort
Habitat:**
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Annual
Category:Vascular
USDA Symbol:PIPU2
Plant Notes:Canadian Clearweed is a native herbaceous annual in the Nettle family (Urticaceae). It is native to Asia and eastern North America. In Alabama it is found throughout the state. Canadian Clearweed occurs in moist shaded woods, along streams, and in swamps. It is an annual with erect, glabrous stems 6-15 inches in height. The roots are fibrous and shallow, with adventitious roots often forming near the base of the stem. Both the stems and leaves are translucent and bright green in color. Leaves are opposite, petiolate, elliptic to elliptic to ovate in outline, with toothed margins. The veins of the leaves are depressed, giving the leaf a wrinkled appearance. Flowers are produced in compact to lax cymes in the upper leaf axils. The flowers are unisexual, with both staminate and pistillate flowers in the same cyme. Individual flowers are inconspicuous with 3 or 4 greenish-whitish tepals. The fruit is a green achene with purple streaks. Canadian Clearweed is often mistaken for stinging nettle (Urtica dioica), but lacks the stinging hairs. Native Americans used the watery sap medicinally to alleviate itching. Canadian Clearweed is a larval food plant for the Eastern Comma (Polygonia comma), Question Mark (Polygonia interrogationis) and Red Admiral (Vanessa atalanta) butterflies.—A. Diamond.
Taxonomic Notes:**
Status:Native
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyURTICACEAE - Nettle family
Genus Pilea
Species Pilea pumila (L.) A. Gray - Canadian Clearweed; Green Fruit Clearweed; Coolwort

Citation

Citation Pilea pumila (Linnaeus) A. Gray, Manual 437. 1848.
Basionym: Urtica pumila L. 1753.
Type: CANADA: Without data, Kalm s.n. (lectotype: LINN 1111.3). Lectotypified by Monro, in Monro & M. A. Spencer, Taxon 54: 797. 2005.

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Adicea deamii Adicea deamii Lunell, Amer. Midl. Naturalist 3: 10. 1913. INDIANA: Mineral Springs, 26 Sep 1912, Nieuwland 10236 (lectotype: MIN). Lectotypified by Boufford, Rhodora 90: 124. 1988.
Adicea nieuwlandii Adicea nieuwlandii Lunell, Amer. Midl. Naturalist 3: 10. 1913. INDIANA: St. Josephs Co.: Notre Dame, 19 Oct 1912, Nieuwland 10341 (holotype: MIN).
Adicea pumila Adicea pumila (Linnaeus) Rafinesque, First Cat. Gard. Transylv. Univ. 13. 1824.Urtica pumila Linnaeus 1753. 
Adike pumila Adike pumila (Linnaeus) Rafinesque, New Fl. 1: 63. 1836.Urtica pumila Linnaeus 1753. 
Pilea pumila var. deamii Pilea pumila (Linnaeus) A. Gray, var. deamii (Lunell) Fernald, Rhodora 38: 169. 1936.Adicea deamii Lunell 1913. 
Urtica pumila Urtica pumila Linnaeus, Sp. Pl. 984. 1753. Without data, Kalm s.n. (lectotype: LINN 1111.3). Lectotypified by Monro, in Monro & M. A. Spencer, Taxon 54: 797. 2005.

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: Baldwin, Barbour, Bibb, Blount, Bullock, Butler, Calhoun, Choctaw, Clay, Cleburne, Coffee, Colbert, Covington, Crenshaw, Cullman, Dale, Dallas, DeKalb, Escambia, Etowah, Franklin, Geneva, Greene, Hale, Houston, Jackson, Jefferson, Lawrence, Lee, Limestone, Macon, Madison, Marengo, Marshall, Mobile, Monroe, Montgomery, Morgan, Pike, Shelby, Talladega, Tuscaloosa, Walker, Wilcox

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: ALNHS, AUA, JSU, SAMF, TROY, UNA, UNAF, USAM, UWAL

Range of years during which specimens were collected: 1968 - 2019

Barcode / Accession No. County Coll. Date Collector &
Collection No.		 Herbarium &
Herbarium Name Used		 Image
UNA00045783 Houston 06 Sep 1993 MacDonald, John R.
6709		 UNA
Pilea pumila (L.) Gray
AUA_ACC_65330 Jefferson 29 Sep 2005 Diamond, Alvin R.
15842		 AUA
Pilea Pumila (L.) Gray
TROY000042980 Houston 13 Aug 2015 Diamond, Alvin R.
26725		 TROY
Pilea pumila (Linnaeus) A. Gray
UNA00031247 Tuscaloosa 14 Sep 1985 Horn, Charles N.
899		 UNA
Pilea pumila (L.) Gray
SAMF0002184 Hale 13 Nov 2010 Keener, Brian R.
6289		 SAMF
Pilea pumila (Linnaeus) A. Gray
JSU136460 Jackson 14 Oct 1975 Whetstone, R. David
7491		 JSU
Pilea pumila (Linnaeus) Gray
UWAL0008518 Bibb 29 Oct 2011 Keener, Brian R.
6818		 UWAL
Pilea pumila (L.) Gray
TROY000024258 Jefferson 29 Sep 2005 Diamond, Alvin R.
15842		 TROY
Pilea pumila (Linnaeus) Gray
UWAL0030490 Morgan 06 Sep 2015 England, J. Kevin
5684		 UWAL
Pilea pumila (Linnaeus) A.Gray
AUA000043451 Cullman 23 Sep 1909 Wolf, Wolfgang
 AUA
Pilea Pumila (L.) Gray
TROY000040298 Hale 13 Nov 2010 Keener, Brian R.
6289		 TROY
Pilea pumila (Linnaeus) A. Gray
AUA000042257 Colbert 20 Aug 2014 Barger, T. Wayne
FH532		 AUA
Pilea Pumila (L.) Gray
JSU136462 Madison 11 Sep 1994 Spaulding, Daniel D.
6197		 JSU
Pilea pumila (Linnaeus) Gray
UWAL0004337 Wilcox 26 Oct 2008 Diamond, Alvin R.
20354		 UWAL
Pilea pumila (L.) Gray
TROY000009504 Monroe 24 Oct 2006 Diamond, Alvin R.
17170		 TROY
Pilea pumila (Linnaeus) Gray
JSU136452 Clay 28 Sep 1994 Ballard, J. Mark
5075		 JSU
Pilea pumila (Linnaeus) Gray
JSU136458 Jackson 13 Aug 1998 Brodeur, Kristin R.
1194		 JSU
Pilea pumila (Linnaeus) Gray
TROY000035010 Bibb 29 Oct 2011 Keener, Brian R.
6818		 TROY
Pilea pumila (Linnaeus) Gray
UWAL0018883 Madison 14 Sep 1984 Kral, Robert
71630		 UWAL
Pilea pumila (L.) Gray
USAM000015113 Baldwin 23 Oct 1974 LeLong, Michel G.
8217		 USAM
Pilea pumila (Linnaeus) A. Gray
UNA00031217 Tuscaloosa 23 Sep 1968 Thomas, Joab L.
1823		 UNA
Pilea pumila (L.) Gray
UWAL0011729 Hale 13 Nov 2010 Keener, Brian R.
6289		 UWAL
Pilea pumila (Linnaeus) Gray
ALNHS00002368 Lee 11 Oct 2013 Barger, T. Wayne
SP#1256		 ALNHS
Pilea pumila (L.) Gray
AUA_ACC_61084 Choctaw 24 Aug 1994 Crouch, Virginia E.
1145		 AUA
Pilea Pumila (L.) Gray
UNA00066274 Barbour 14 Nov 2006 Diamond, Alvin R.
17240		 UNA
Pilea pumila (L.) Gray
JSU136454 DeKalb 23 Aug 1992 Clearman, F.W., Jr.
290		 JSU
Pilea pumila (Linnaeus) Gray
TROY000009496 Barbour 14 Nov 2006 Diamond, Alvin R.
17240		 TROY
Pilea pumila (Linnaeus) Gray
UNA00048824 Houston 07 Sep 1991 MacDonald, John R.
3664		 UNA
Pilea pumila (L.) Gray
AUA_ACC_65315 Wilcox 3 Nov 2005 Diamond, Alvin R.
16034		 AUA
Pilea Pumila (L.) Gray
TROY000024259 Lawrence 20 Sep 2008 England, J. Kevin
1159		 TROY
Pilea pumila (Linnaeus) Gray var. pumila
AUA_ACC_34493 Macon 15 Oct 1976 Sessler, Ann H.
 AUA
Pilea Pumila (L.) Gray
UNA00053599 Greene 05 Aug 1969 Thomas, Joab L.
2378		 UNA
Pilea pumila (L.) Gray
USAM000015116 Baldwin 15 Nov 1980 LeLong, Michel G.
11884		 USAM
Pilea pumila (Linnaeus) A. Gray
UWAL0056245 Jackson 14 Sep 2019 England, Kevin J.
10550		 UWAL
Pilea pumila (L.) A.Gray
UWAL0036041 Blount 13 Oct 2015 Anderson, Kelly
965		 UWAL
Pilea pumila (L.) A.Gray
TROY000029418 Montgomery 29 Sep 2009 Diamond, Alvin R.
20957		 TROY
Pilea pumila (Linnaeus) Gray
UWAL0051913 Madison 04 Oct 2020 England, J. Kevin
11270		 UWAL
Pilea pumila (L.) A Gray
UWAL0004336 Marengo 16 Sep 2008 England, J. Kevin
1139		 UWAL
Pilea pumila (L.) Gray
AUA000040344 Houston 27 May 2015 Barger, T. Wayne
DTP170		 AUA
Pilea Pumila (L.) Gray
JSU136467 Shelby 12 Oct 1996 Spaulding, Daniel D.
9339		 JSU
Pilea pumila (Linnaeus) Gray
JSU136459 Jackson 20 Aug 1998 Brodeur, Kristin R.
1342		 JSU
Pilea pumila (Linnaeus) Gray
TROY000024387 Houston 25 Sep 2008 Diamond, Alvin R.
20106		 TROY
Pilea pumila (Linnaeus) Gray
SAMF0002186 Blount 02 Oct 2003 Davenport, Lawrence J.
2987		 SAMF
Pilea pumila (Linnaeus) A. Gray
UNA00062236 Pike 05 Oct 2003 Diamond, Alvin R.
14226		 UNA
Pilea pumila (L.) Gray
JSU136463 Marshall 20 Sep 1986 Whetstone, R. David
15734		 JSU
Pilea pumila (Linnaeus) Gray
JSU136461 Limestone 2 Jun 1997 Hofmann, Tim L.
00555		 JSU
Pilea pumila (Linnaeus) Gray
AUA_ACC_37455 Limestone 5 Aug 1981 O'Halloran, K.
344		 AUA
Pilea Pumila (L.) Gray
UNA00069911 Marshall 06 Aug 2008 Webb, David
6790		 UNA
Pilea pumila (L.) Gray
UWAL0033372 Lawrence 02 Oct 2016 England, J. Kevin
6894		 UWAL
Pilea pumila (Linnaeus) Gray
TROY000040545 Franklin 06 Oct 2012 Keener, Brian R.
7583		 TROY
Pilea pumila (Linnaeus) A. Gray
AUA_ACC_61085 Choctaw 26 Aug 1994 Crouch, Virginia E.
1182		 AUA
Pilea Pumila (L.) Gray
TROY000048064 Lawrence 02 Oct 1993 Blythe, Fennel
12		 TROY
Pilea pumila (L.) A. Gray
JSU136449 Calhoun 25 Sep 1986 Dickson, Catherine C.
s.n.		 JSU
Pilea pumila (Linnaeus) Gray
TROY000033227 Barbour 17 Sep 2011 Dykes, Bailee
119		 TROY
Pilea pumila (Linnaeus) Gray
UNA00031207 Walker s.d. Smith, Eugene A.
s.n.		 UNA
Pilea pumila (L.) Gray
AUA_ACC_33263 Dallas 8 Sep 1976 Sessler, Ann H.
540		 AUA
Pilea Pumila (L.) Gray
TROY000009499 Coffee 04 Sep 2000 Martin, Brian H.
923		 TROY
Pilea pumila (Linnaeus) Gray
AUA_ACC_33425 Bibb 16 Sep 1976 Sessler, Ann H.
720		 AUA
Pilea Pumila (L.) Gray
TROY000009498 Butler 07 Oct 2006 Diamond, Alvin R.
17027		 TROY
Pilea pumila (Linnaeus) Gray
AUA000041279 Covington 21 Nov 2013 Hansen, Curtis J.
5870		 AUA
Pilea Pumila (L.) Gray
TROY000009500 Crenshaw 12 Jul 2006 Diamond, Alvin R.
16681		 TROY
Pilea pumila (Linnaeus) Gray
JSU136450 Calhoun 25 Sep 1986 Alford, J. Erik
s.n.		 JSU
Pilea pumila (Linnaeus) Gray
TROY000009497 Butler 30 Sep 2007 Diamond, Alvin R.
18434		 TROY
Pilea pumila (Linnaeus) Gray
USAM000015114 Mobile 01 Nov 1980 LeLong, Michel G.
11814		 USAM
Pilea pumila (Linnaeus) A. Gray
JSU136455 Etowah 27 Aug 1994 Hodge, Lesley M.
3254		 JSU
Pilea pumila (Linnaeus) Gray
UWAL0011995 Franklin 06 Oct 2012 Keener, Brian R.
7583		 UWAL
Pilea pumila (Linnaeus) Gray
UWAL0019807 Houston 13 Aug 2015 Diamond, Alvin R.
26725		 UWAL
Pilea pumila (Linnaeus) A.Gray
JSU136465 Marshall 13 Sep 1991 Spaulding, Daniel D.
896		 JSU
Pilea pumila (Linnaeus) Gray
SAMF0002185 Shelby 06 Oct 2011 Davenport, Lawrence J.
4933		 SAMF
Pilea pumila (Linnaeus) A. Gray
SAMF0008328 Blount 20 Oct 2022 Davenport, L.J.
7064		 SAMF
Pilea pumila (Linnaeus) A. Gray
UWAL0004334 Escambia 12 Nov 2007 Diamond, Alvin R.
18661		 UWAL
Pilea pumila (L.) Gray
AUA_ACC_33250 Bibb 2 Sep 1976 Sessler, Ann H.
503		 AUA
Pilea Pumila (L.) Gray
TROY000009502 Monroe 17 Sep 2007 Diamond, Alvin R.
18151		 TROY
Pilea pumila (Linnaeus) Gray
AUA000037575 Lee 28 Sep 2018 Schotz, Alfred
CSP-561		 AUA
Pilea Pumila (L.) Gray
TROY000024386 Escambia 12 Nov 2007 Diamond, Alvin R.
18661		 TROY
Pilea pumila (Linnaeus) Gray
JSU136448 Calhoun 7 Oct 1994 Hruska, Susan E.
519		 JSU
Pilea pumila (Linnaeus) Gray
USAM000015115 Mobile 01 Nov 1980 LeLong, Michel G.
11814		 USAM
Pilea pumila (Linnaeus) A. Gray
JSU136456 Jackson 21 Sep 1997 Spaulding, Daniel D.
10097		 JSU
Pilea pumila (Linnaeus) Gray
JSU136446 Calhoun 1 Nov 1986 Lawler, Carol L.
1482		 JSU
Pilea pumila (Linnaeus) Gray
UWAL0017279 Lawrence 26 Mar 2008 England, J. Kevin
675		 UWAL
Pilea pumila (Linnaeus) A. Gray
JSU136466 Morgan 15 Sep 1996 Spaulding, Daniel D.
9196		 JSU
Pilea pumila (Linnaeus) Gray
UNA00050450 Dallas 21 Sep 1995 Birk, Michelle
438		 UNA
Pilea pumila (L.) Gray
TROY000024257 Blount 07 Sep 2002 Kral, Robert
93178		 TROY
Pilea pumila (Linnaeus) Gray
UNAF0001835 Marshall 06 Aug 2008 Webb, David H.
6790		 UNAF
Pilea pumila (Linnaeus) A. Gray
TROY000009507 Wilcox 03 Nov 2005 Diamond, Alvin R.
16034		 TROY
Pilea pumila (Linnaeus) Gray
JSU136451 Calhoun 24 Aug 1982 Whetstone, R. David
12019A		 JSU
Pilea pumila (Linnaeus) Gray
JSU136447 Calhoun 10 Sep 1995 Hruska, Susan E.
876		 JSU
Pilea pumila (Linnaeus) Gray
UWAL0004335 Lawrence 20 Sep 2008 England, J. Kevin
1159		 UWAL
Pilea pumila (L.) Gray var. pumila
ALNHS00000676 Monroe 05 Oct 2011 Barger, T. Wayne
RH-421		 ALNHS
Pilea pumila (L.) Gray
UWAL0038614 Lawrence 03 Sep 2018 England, J. Kevin
9442		 UWAL
Pilea pumila (Linnaeus) A. Gray
TROY000009501 Geneva 27 Oct 1999 MacDonald, John R.
13705		 TROY
Pilea pumila (Linnaeus) Gray
AUA000043449 Cullman 1903 Wolf, Wolfgang
 AUA
Pilea Pumila (L.) Gray
TROY000009506 Pike 20 Oct 1998 Diamond, Alvin R.
11495		 TROY
Pilea pumila (Linnaeus) Gray
AUA000040137 Colbert 20 Aug 2014 Barger, T. Wayne
FH532		 AUA
Pilea Pumila (L.) Gray
JSU136468 Shelby 11 Oct 1997 Spaulding, Daniel D.
10148		 JSU
Pilea pumila (Linnaeus) Gray
TROY000034127 Bullock 23 Oct 2011 Dykes, Bailee
251		 TROY
Pilea pumila (Linnaeus) Gray
AUA000030082 Morgan 6 Sep 2015 England, J. Kevin
5684		 AUA
Pilea Pumila (L.) Gray
TROY000009505 Pike 05 Oct 2003 Diamond, Alvin R.
14226		 TROY
Pilea pumila (Linnaeus) Gray
JSU136457 Jackson 24 Oct 1992 Ballard, J. Mark
775		 JSU
Pilea pumila (Linnaeus) Gray
UWAL0038772 Bullock 29 Sep 2017 Horne, Howard E.
4280		 UWAL
Pilea pumila (Linneaus) A. Gray
TROY000024388 Marengo 16 Sep 2008 England, J. Kevin
1139		 TROY
Pilea pumila (Linnaeus) Gray
UWAL0010043 Bullock 23 Oct 2011 Dykes, Bailee
251		 UWAL
Pilea pumila (Linnaeus) Gray
TROY000031371 Bibb 02 Sep 1976 Sessler, Ann H.
503		 TROY
Pilea pumila (Linnaeus) Gray
JSU136464 Marshall 9 Sep 1991 Spaulding, Daniel D.
868		 JSU
Pilea pumila (Linnaeus) Gray
AUA_ACC_63456 Pike 5 Oct 2003 Diamond, Alvin R.
14226		 AUA
Pilea Pumila (L.) Gray
JSU136453 Cleburne 26 Aug 1980 Whetstone, R. David
10280		 JSU
Pilea pumila (Linnaeus) Gray
SAMF0002183 Jefferson 28 Sep 2006 Davenport, Lawrence J.
3606		 SAMF
Pilea pumila (Linnaeus) A. Gray
JSU136469 Shelby 10 Sep 1982 Whetstone, R. David
12304		 JSU
Pilea pumila (Linnaeus) Gray
UWAL0006006 Dale 25 Sep 1982 Kral, Robert
69737		 UWAL
Pilea pumila (L.) Gray
JSU136470 Talladega 29 Sep 1983 Whetstone, R. David
13770		 JSU
Pilea pumila (Linnaeus) Gray
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