Pilea pumila

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
UWAL0008518 Bibb 29 Oct 2011 Keener, Brian R.
6818
UWAL
Pilea pumila (L.) Gray
AUA_ACC_61084 Choctaw 24 Aug 1994 Crouch, Virginia E.
1145
AUA
Pilea Pumila (L.) Gray
UWAL0018883 Madison 14 Sep 1984 Kral, Robert
71630
UWAL
Pilea pumila (L.) Gray
TROY000009497 Butler 30 Sep 2007 Diamond, Alvin R.
18434
TROY
Pilea pumila (Linnaeus) Gray
JSU136458 Jackson 13 Aug 1998 Brodeur, Kristin R.
1194
JSU
Pilea pumila (Linnaeus) Gray
UWAL0056245 Jackson 14 Sep 2019 England, Kevin J.
10550
UWAL
Pilea pumila (L.) A.Gray
TROY000024259 Lawrence 20 Sep 2008 England, J. Kevin
1159
TROY
Pilea pumila (Linnaeus) Gray var. pumila
JSU136455 Etowah 27 Aug 1994 Hodge, Lesley M.
3254
JSU
Pilea pumila (Linnaeus) Gray
TROY000029418 Montgomery 29 Sep 2009 Diamond, Alvin R.
20957
TROY
Pilea pumila (Linnaeus) Gray
AUA_ACC_65315 Wilcox 3 Nov 2005 Diamond, Alvin R.
16034
AUA
Pilea Pumila (L.) Gray
TROY000009500 Crenshaw 12 Jul 2006 Diamond, Alvin R.
16681
TROY
Pilea pumila (Linnaeus) Gray
AUA_ACC_63456 Pike 5 Oct 2003 Diamond, Alvin R.
14226
AUA
Pilea Pumila (L.) Gray
TROY000009506 Pike 20 Oct 1998 Diamond, Alvin R.
11495
TROY
Pilea pumila (Linnaeus) Gray
UWAL0017279 Lawrence 26 Mar 2008 England, J. Kevin
675
UWAL
Pilea pumila (Linnaeus) A. Gray
AUA000041279 Covington 21 Nov 2013 Hansen, Curtis J.
5870
AUA
Pilea Pumila (L.) Gray
USAM000015114 Mobile 01 Nov 1980 LeLong, Michel G.
11814
USAM
Pilea pumila (Linnaeus) A. Gray
UWAL0019807 Houston 13 Aug 2015 Diamond, Alvin R.
26725
UWAL
Pilea pumila (Linnaeus) A.Gray
JSU136470 Talladega 29 Sep 1983 Whetstone, R. David
13770
JSU
Pilea pumila (Linnaeus) Gray
AUA000030082 Morgan 6 Sep 2015 England, J. Kevin
5684
AUA
Pilea Pumila (L.) Gray
UNA00045783 Houston 06 Sep 1993 MacDonald, John R.
6709
UNA
Pilea pumila (L.) Gray
TROY000009504 Monroe 24 Oct 2006 Diamond, Alvin R.
17170
TROY
Pilea pumila (Linnaeus) Gray
UWAL0030490 Morgan 06 Sep 2015 England, J. Kevin
5684
UWAL
Pilea pumila (Linnaeus) A.Gray
TROY000009507 Wilcox 03 Nov 2005 Diamond, Alvin R.
16034
TROY
Pilea pumila (Linnaeus) Gray
JSU136460 Jackson 14 Oct 1975 Whetstone, R. David
7491
JSU
Pilea pumila (Linnaeus) Gray
ALNHS00000676 Monroe 05 Oct 2011 Barger, T. Wayne
RH-421
ALNHS
Pilea pumila (L.) Gray
JSU136456 Jackson 21 Sep 1997 Spaulding, Daniel D.
10097
JSU
Pilea pumila (Linnaeus) Gray
AUA_ACC_33425 Bibb 16 Sep 1976 Sessler, Ann H.
720
AUA
Pilea Pumila (L.) Gray
UWAL0036041 Blount 13 Oct 2015 Anderson, Kelly
965
UWAL
Pilea pumila (L.) A.Gray
AUA_ACC_61085 Choctaw 26 Aug 1994 Crouch, Virginia E.
1182
AUA
Pilea Pumila (L.) Gray
UWAL0038772 Bullock 29 Sep 2017 Horne, Howard E.
4280
UWAL
Pilea pumila (Linneaus) A. Gray
TROY000040545 Franklin 06 Oct 2012 Keener, Brian R.
7583
TROY
Pilea pumila (Linnaeus) A. Gray
JSU136459 Jackson 20 Aug 1998 Brodeur, Kristin R.
1342
JSU
Pilea pumila (Linnaeus) Gray
SAMF0002184 Hale 13 Nov 2010 Keener, Brian R.
6289
SAMF
Pilea pumila (Linnaeus) A. Gray
TROY000035010 Bibb 29 Oct 2011 Keener, Brian R.
6818
TROY
Pilea pumila (Linnaeus) Gray
JSU136461 Limestone 2 Jun 1997 Hofmann, Tim L.
00555
JSU
Pilea pumila (Linnaeus) Gray
UNA00062236 Pike 05 Oct 2003 Diamond, Alvin R.
14226
UNA
Pilea pumila (L.) Gray
AUA000043449 Cullman 1903 Wolf, Wolfgang
AUA
Pilea Pumila (L.) Gray
TROY000024386 Escambia 12 Nov 2007 Diamond, Alvin R.
18661
TROY
Pilea pumila (Linnaeus) Gray
UWAL0011729 Hale 13 Nov 2010 Keener, Brian R.
6289
UWAL
Pilea pumila (Linnaeus) Gray
TROY000034127 Bullock 23 Oct 2011 Dykes, Bailee
251
TROY
Pilea pumila (Linnaeus) Gray
JSU136454 DeKalb 23 Aug 1992 Clearman, F.W., Jr.
290
JSU
Pilea pumila (Linnaeus) Gray
UWAL0004336 Marengo 16 Sep 2008 England, J. Kevin
1139
UWAL
Pilea pumila (L.) Gray
USAM000015115 Mobile 01 Nov 1980 LeLong, Michel G.
11814
USAM
Pilea pumila (Linnaeus) A. Gray
UWAL0004335 Lawrence 20 Sep 2008 England, J. Kevin
1159
UWAL
Pilea pumila (L.) Gray var. pumila
TROY000009505 Pike 05 Oct 2003 Diamond, Alvin R.
14226
TROY
Pilea pumila (Linnaeus) Gray
UWAL0004337 Wilcox 26 Oct 2008 Diamond, Alvin R.
20354
UWAL
Pilea pumila (L.) Gray
UNA00048824 Houston 07 Sep 1991 MacDonald, John R.
3664
UNA
Pilea pumila (L.) Gray
TROY000024388 Marengo 16 Sep 2008 England, J. Kevin
1139
TROY
Pilea pumila (Linnaeus) Gray
UWAL0051913 Madison 04 Oct 2020 England, J. Kevin
11270
UWAL
Pilea pumila (L.) A Gray
TROY000024258 Jefferson 29 Sep 2005 Diamond, Alvin R.
15842
TROY
Pilea pumila (Linnaeus) Gray
AUA_ACC_65330 Jefferson 29 Sep 2005 Diamond, Alvin R.
15842
AUA
Pilea Pumila (L.) Gray
TROY000048064 Lawrence 02 Oct 1993 Blythe, Fennel
12
TROY
Pilea pumila (L.) A. Gray
TROY000009498 Butler 07 Oct 2006 Diamond, Alvin R.
17027
TROY
Pilea pumila (Linnaeus) Gray
AUA_ACC_33250 Bibb 2 Sep 1976 Sessler, Ann H.
503
AUA
Pilea Pumila (L.) Gray
TROY000009496 Barbour 14 Nov 2006 Diamond, Alvin R.
17240
TROY
Pilea pumila (Linnaeus) Gray
AUA000040137 Colbert 20 Aug 2014 Barger, T. Wayne
FH532
AUA
Pilea Pumila (L.) Gray
JSU136467 Shelby 12 Oct 1996 Spaulding, Daniel D.
9339
JSU
Pilea pumila (Linnaeus) Gray
TROY000009499 Coffee 04 Sep 2000 Martin, Brian H.
923
TROY
Pilea pumila (Linnaeus) Gray
SAMF0002186 Blount 02 Oct 2003 Davenport, Lawrence J.
2987
SAMF
Pilea pumila (Linnaeus) A. Gray
TROY000033227 Barbour 17 Sep 2011 Dykes, Bailee
119
TROY
Pilea pumila (Linnaeus) Gray
AUA000037575 Lee 28 Sep 2018 Schotz, Alfred
CSP-561
AUA
Pilea Pumila (L.) Gray
UWAL0010043 Bullock 23 Oct 2011 Dykes, Bailee
251
UWAL
Pilea pumila (Linnaeus) Gray
JSU136462 Madison 11 Sep 1994 Spaulding, Daniel D.
6197
JSU
Pilea pumila (Linnaeus) Gray
UNA00069911 Marshall 06 Aug 2008 Webb, David
6790
UNA
Pilea pumila (L.) Gray
UWAL0011995 Franklin 06 Oct 2012 Keener, Brian R.
7583
UWAL
Pilea pumila (Linnaeus) Gray
TROY000024387 Houston 25 Sep 2008 Diamond, Alvin R.
20106
TROY
Pilea pumila (Linnaeus) Gray
JSU136450 Calhoun 25 Sep 1986 Alford, J. Erik
s.n.
JSU
Pilea pumila (Linnaeus) Gray
TROY000009502 Monroe 17 Sep 2007 Diamond, Alvin R.
18151
TROY
Pilea pumila (Linnaeus) Gray
JSU136463 Marshall 20 Sep 1986 Whetstone, R. David
15734
JSU
Pilea pumila (Linnaeus) Gray
AUA_ACC_37455 Limestone 5 Aug 1981 O'Halloran, K.
344
AUA
Pilea Pumila (L.) Gray
JSU136449 Calhoun 25 Sep 1986 Dickson, Catherine C.
s.n.
JSU
Pilea pumila (Linnaeus) Gray
TROY000009501 Geneva 27 Oct 1999 MacDonald, John R.
13705
TROY
Pilea pumila (Linnaeus) Gray
JSU136446 Calhoun 1 Nov 1986 Lawler, Carol L.
1482
JSU
Pilea pumila (Linnaeus) Gray
USAM000015116 Baldwin 15 Nov 1980 LeLong, Michel G.
11884
USAM
Pilea pumila (Linnaeus) A. Gray
UNA00050450 Dallas 21 Sep 1995 Birk, Michelle
438
UNA
Pilea pumila (L.) Gray
USAM000015113 Baldwin 23 Oct 1974 LeLong, Michel G.
8217
USAM
Pilea pumila (Linnaeus) A. Gray
JSU136468 Shelby 11 Oct 1997 Spaulding, Daniel D.
10148
JSU
Pilea pumila (Linnaeus) Gray
UNA00066274 Barbour 14 Nov 2006 Diamond, Alvin R.
17240
UNA
Pilea pumila (L.) Gray
AUA000043451 Cullman 23 Sep 1909 Wolf, Wolfgang
AUA
Pilea Pumila (L.) Gray
TROY000042980 Houston 13 Aug 2015 Diamond, Alvin R.
26725
TROY
Pilea pumila (Linnaeus) A. Gray
UWAL0004334 Escambia 12 Nov 2007 Diamond, Alvin R.
18661
UWAL
Pilea pumila (L.) Gray
SAMF0008328 Blount 20 Oct 2022 Davenport, L.J.
7064
SAMF
Pilea pumila (Linnaeus) A. Gray
JSU136464 Marshall 9 Sep 1991 Spaulding, Daniel D.
868
JSU
Pilea pumila (Linnaeus) Gray
SAMF0002183 Jefferson 28 Sep 2006 Davenport, Lawrence J.
3606
SAMF
Pilea pumila (Linnaeus) A. Gray
UNA00053599 Greene 05 Aug 1969 Thomas, Joab L.
2378
UNA
Pilea pumila (L.) Gray
AUA000040344 Houston 27 May 2015 Barger, T. Wayne
DTP170
AUA
Pilea Pumila (L.) Gray
JSU136466 Morgan 15 Sep 1996 Spaulding, Daniel D.
9196
JSU
Pilea pumila (Linnaeus) Gray
AUA_ACC_33263 Dallas 8 Sep 1976 Sessler, Ann H.
540
AUA
Pilea Pumila (L.) Gray
TROY000031371 Bibb 02 Sep 1976 Sessler, Ann H.
503
TROY
Pilea pumila (Linnaeus) Gray
JSU136469 Shelby 10 Sep 1982 Whetstone, R. David
12304
JSU
Pilea pumila (Linnaeus) Gray
UWAL0038614 Lawrence 03 Sep 2018 England, J. Kevin
9442
UWAL
Pilea pumila (Linnaeus) A. Gray
JSU136453 Cleburne 26 Aug 1980 Whetstone, R. David
10280
JSU
Pilea pumila (Linnaeus) Gray
JSU136452 Clay 28 Sep 1994 Ballard, J. Mark
5075
JSU
Pilea pumila (Linnaeus) Gray
UNA00031207 Walker s.d. Smith, Eugene A.
s.n.
UNA
Pilea pumila (L.) Gray
JSU136448 Calhoun 7 Oct 1994 Hruska, Susan E.
519
JSU
Pilea pumila (Linnaeus) Gray
AUA_ACC_34493 Macon 15 Oct 1976 Sessler, Ann H.
AUA
Pilea Pumila (L.) Gray
UNA00031247 Tuscaloosa 14 Sep 1985 Horn, Charles N.
899
UNA
Pilea pumila (L.) Gray
AUA000042257 Colbert 20 Aug 2014 Barger, T. Wayne
FH532
AUA
Pilea Pumila (L.) Gray
JSU136465 Marshall 13 Sep 1991 Spaulding, Daniel D.
896
JSU
Pilea pumila (Linnaeus) Gray
UNA00031217 Tuscaloosa 23 Sep 1968 Thomas, Joab L.
1823
UNA
Pilea pumila (L.) Gray
UNAF0001835 Marshall 06 Aug 2008 Webb, David H.
6790
UNAF
Pilea pumila (Linnaeus) A. Gray
TROY000040298 Hale 13 Nov 2010 Keener, Brian R.
6289
TROY
Pilea pumila (Linnaeus) A. Gray
UWAL0006006 Dale 25 Sep 1982 Kral, Robert
69737
UWAL
Pilea pumila (L.) Gray
UWAL0033372 Lawrence 02 Oct 2016 England, J. Kevin
6894
UWAL
Pilea pumila (Linnaeus) Gray
JSU136451 Calhoun 24 Aug 1982 Whetstone, R. David
12019A
JSU
Pilea pumila (Linnaeus) Gray
JSU136457 Jackson 24 Oct 1992 Ballard, J. Mark
775
JSU
Pilea pumila (Linnaeus) Gray
TROY000024257 Blount 07 Sep 2002 Kral, Robert
93178
TROY
Pilea pumila (Linnaeus) Gray
JSU136447 Calhoun 10 Sep 1995 Hruska, Susan E.
876
JSU
Pilea pumila (Linnaeus) Gray
SAMF0002185 Shelby 06 Oct 2011 Davenport, Lawrence J.
4933
SAMF
Pilea pumila (Linnaeus) A. Gray
ALNHS00002368 Lee 11 Oct 2013 Barger, T. Wayne
SP#1256
ALNHS
Pilea pumila (L.) Gray
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