Podostemum ceratophyllum

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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:PODOSTEMACEAE
Species:Podostemum ceratophyllum Michx.
Common Name:Horn Leaf Riverweed; Threadfoot
Habitat:**
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Perennial
Category:Vascular
USDA Symbol:**
Plant Notes:Horn Leaf Riverweed is a native perennial in the Riverweed family (Podostemaceae). Horn Leaf Riverweed is a submerged aquatic plant growing attached to rocks in riffles, waterfalls, and other areas of shallow, swift flowing water. It can be found throughout Alabama where suitable habitat occurs. Horn Leaf Riverweed grows tightly attached to rocks by the means of haptera (fleshy disc-like outgrowths) that are produced along its roots. Leaves are olive green in color and repeatedly forked and divided into linear segments. They are attached alternately along the stem. Flowers are produced when plants are exposed by low water levels. The flowers occur in groups of 1-12. The tepals (sepals and petals) are small and scale-like, making them very inconspicuous. Each flower consists of one ovary and two stamens. The fruit is a capsule. Horn Leaf Riverweed is an unusual flowering vascular plant that more closely resembles an algae or moss. It often forms extensive mats in suitable habitat. It has been associated with extremely high secondary production of benthic macroinvertebrates, and is an important component in stream productivity. Horn Leaf Riverweed also provides shelter for many species.--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

FamilyPODOSTEMACEAE - Riverweed family
Genus Podostemum
Species Podostemum ceratophyllum Michx. - Horn Leaf Riverweed; Threadfoot

Citation

Citation Podostemum ceratophyllum Michaux, Fl. Bor.-Amer. 2: 165, pl. 44 [as "Podostemon"]. 1803.
Basionym: **
Type: **

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Podostemum abrotanoides    

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: Bibb, Blount, Cherokee, Clay, Cleburne, Coffee, Conecuh, Coosa, Covington, Dale, DeKalb, Elmore, Jackson, Lauderdale, Lee, Limestone, Macon, Marion, Marshall, Randolph, Shelby, Talladega, Tallapoosa, Tuscaloosa

Counties represented by specimen data listed below:

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

Range of years during which specimens were collected: 1884 - 2019

Barcode / Accession No. County Coll. Date Collector &
Collection No.		 Herbarium &
Herbarium Name Used		 Image
SAMF0000940 Shelby 28 Jun 2005 Davenport, Lawrence J.
3257		 SAMF
Podostemum ceratophyllum Michaux
UNA00018710 Cherokee 01 Jul 1979 Haynes, Robert R.
7329		 UNA
Podostemum ceratophyllum Michx.
UNA00018717 Cherokee 06 Jul 1978 Wiersema, John H.
376		 UNA
Podostemum ceratophyllum Michx.
SAMF0008323 Marshall 20 Oct 2022 Davenport, L.J.
7060		 SAMF
Podostemum ceratophyllum Michaux
SAMF0000941 Coosa 21 Jun 2005 Davenport, Lawrence J.
3251		 SAMF
Podostemum ceratophyllum Michaux
UNA00018715 Tallapoosa 21 Jun 1980 Haynes, Robert R.
7879		 UNA
Podostemum ceratophyllum Michx.
SAMF0000939 Blount 04 Aug 2009 Davenport, Lawrence J.
3993		 SAMF
Podostemum ceratophyllum Michaux
JSU142080 Lee 29 Jun 1978 Kral, Robert
62212		 JSU
Podostemum ceratophyllum Michaux
UNA00016712 Marion 26 Mar 1987 Bowers, Frank D.
13064		 UNA
Podostemum ceratophyllum Michx.
UWAL0036010 Blount 10 Nov 2012 Anderson, Kelly
101		 UWAL
Podostemum ceratophyllum Michx.
TROY000007780 Covington 17 Jun 2002 Diamond, Alvin R.
13343		 TROY
Podostemum ceratophyllum Michaux
UWAL0014867 Coosa 12 Jul 2013 Diamond, Alvin R.
24367		 UWAL
Podostemum ceratophyllum Michaux
UWAL0046935 Limestone 14 Apr 2020 Webb, David H.
8885		 UWAL
Podostemum ceratophyllum Michaux
UNA00018713 Lauderdale 31 Jul 1978 Haynes, Robert R.
6784		 UNA
Podostemum ceratophyllum Michx.
UNA00018722 DeKalb 03 Jul 1980 Meigs, Russell A.
930		 UNA
Podostemum ceratophyllum Michx.
JSU139037 Jackson 30 Jun 1996 Spaulding, Daniel D.
9028		 JSU
Podostemum ceratophyllum Michaux
UWAL0033713 Clay 22 Jun 2016 Keener, Brian R.
9691		 UWAL
Podostemum ceratophyllum Michaux
UNA00018721 Tuscaloosa 17 Jun 1979 Davenport, Lawrence J.
1204		 UNA
Podostemum ceratophyllum Michx.
SAMF0000948 Bibb 27 Jun 1988 Davenport, Lawrence J.
2571		 SAMF
Podostemum ceratophyllum Michaux
UNA00018723 Lee 25 Jun 1959 Carothers, John L.
s.n.		 UNA
Podostemum ceratophyllum Michx.
UNA00047410 Dale 13 Jun 1997 MacDonald, John R.
10668		 UNA
Podostemum ceratophyllum Michx.
UNA00018720 Lee 04 Apr 1897 Baker, Charles F.
s.n.		 UNA
Podostemum ceratophyllum Michx.
SAMF0000947 Lee 22 May 1991 Davenport, Lawrence J.
2760		 SAMF
Podostemum ceratophyllum Michaux
UNA00018727 Lee 20 Jun 1980 Haynes, Robert R.
7858		 UNA
Podostemum ceratophyllum Michx.
UNA00054084 Blount 26 Jul 1997 Keener, Brian R.
271		 UNA
Podostemum ceratophyllum Michx.
JSU142078 Clay 19 Oct 1996 Ballard, J. Mark
6993		 JSU
Podostemum ceratophyllum Michaux
UWAL0049528 Limestone 26 May 2020 Webb, David H.
8968		 UWAL
Podostemum ceratophyllum Michaux
UNA00018735 Lauderdale 02 Jul 1964 Hall, T.F.
s.n.		 UNA
Podostemum ceratophyllum Michx.
UWAL0046934 Lauderdale 20 Apr 2020 Webb, David H.
8897		 UWAL
Podostemum ceratophyllum Michaux
SAMF0006588 Clay 22 Jun 2016 Davenport, Lawrence J.
6416		 SAMF
Podostemum ceratophyllum Michaux
UNA00018718 DeKalb 07 Jul 1978 Haynes, Robert R.
6587		 UNA
Podostemum ceratophyllum Michx.
TROY000051695 Tallapoosa 30 Sep 2020 Diamond, Alvin R.
29460		 TROY
Podostemum ceratophyllum Michaux
UNA00053326 Tallapoosa 10 Jun 1999 Haynes, Robert R.
10000		 UNA
Podostemum ceratophyllum Michx.
JSU142079 Clay 12 Jul 1993 Ballard, J. Mark
2946		 JSU
Podostemum ceratophyllum Michaux
UNA00059418 Cleburne 02 Jun 2002 Spaulding, Daniel D.
11334		 UNA
Podostemum ceratophyllum Michx.
SAMF0000946 Bibb 18 Jun 1988 Davenport, Lawrence J.
2570		 SAMF
Podostemum ceratophyllum Michaux
UNA00018714 Randolph 01 Jul 1979 Haynes, Robert R.
7354		 UNA
Podostemum ceratophyllum Michx.
UNA00018716 Lee 12 Jun 1979 Wiersema, John H.
831		 UNA
Podostemum ceratophyllum Michx.
ALNHS00004332 Lauderdale 29 Sep 2015 Barger, T. Wayne
SC-518		 ALNHS
Podostemum ceratophyllum Michx.
SAMF0000943 Talladega 08 Jun 2005 Davenport, Lawrence J.
3231		 SAMF
Podostemum ceratophyllum Michaux
UNA00018711 Coosa 21 Jun 1980 Haynes, Robert R.
7904		 UNA
Podostemum ceratophyllum Michx.
SAMF0001661 Tallapoosa 17 Jun 2013 Davenport, Lawrence J.
5460		 SAMF
Podostemum ceratophyllum Michaux
UNA00018725 Lee 27 Jul 1959 Pamatmat, Mario M.
s.n.		 UNA
Podostemum ceratophyllum Michx.
SAMF0000942 Coosa 21 Jun 2005 Davenport, Lawrence J.
3248		 SAMF
Podostemum ceratophyllum Michaux
UNA00057001 Shelby 09 May 1987 Bowers, Frank D.
15198		 UNA
Podostemum ceratophyllum Michx.
UWAL0049445 Blount 14 Jun 2013 Anderson, Kelly
252		 UWAL
Podostemum ceratophyllum Michx.
UNA00018724 Blount 14 Jun 1884 Mohr, Charles
s.n.		 UNA
Podostemum ceratophyllum Michx.
TROY000022106 Cleburne 02 Jun 2002 Spaulding, Daniel D.
11334		 TROY
Podostemum ceratophyllum Michaux
UWAL0045953 Tallapoosa 28 May 2018 Spaulding, Daniel D.
15317b		 UWAL
Podostemum ceratophyllum Michx.
TROY000039534 Elmore 17 Oct 2011 Pullen, Robert
311		 TROY
Podostemum ceratophyllum Michaux
AUA_ACC_50902 Covington 7 Aug 1991 Diamond, Alvin R.
7618		 AUA
Podostemum Ceratophyllum Michx.
UNA00018719 DeKalb 03 Jul 1980 Meigs, Russell A.
930		 UNA
Podostemum ceratophyllum Michx.
UWAL0045913 Cleburne 20 May 2018 Spaulding, Daniel D.
15292		 UWAL
Podostemum ceratophyllum Michx.
AUA_ACC_9391 Lee 1 May 1960 Jones, Jr., Samuel B.
458		 AUA
Podostemum Ceratophyllum Michx.
TROY000007781 Dale 13 Jun 2002 Diamond, Alvin R.
13301		 TROY
Podostemum ceratophyllum Michaux
AUA_ACC_59110 Dale 24 Jul 1998 Diamond, Alvin R.
11353		 AUA
Podostemum Ceratophyllum Michx.
AUA_ACC_5641 Tallapoosa 8 Mar 1958 Clawson, Sterling G.
 AUA
Podostemum Ceratophyllum Michx.
UWAL0012119 Tallapoosa 17 Jun 2013 Davenport, L.J.
5460		 UWAL
Podostemum ceratophyllum Michaux
UNA00018726 Bibb 13 Jul 1979 Haynes, Robert R.
7462		 UNA
Podostemum ceratophyllum Michx.
TROY000046135 Marion 17 Jun 2013 Keener, Brian R.
7907a		 TROY
Podostemum ceratophyllum Michaux
ALNHS00003740 Lauderdale 29 Sep 2015 Barger, T. Wayne
SC-519		 ALNHS
Podostemum ceratophyllum Michx.
AUA_ACC_10852 Lee 27 Jul 1959 Akedin, Zaynul
 AUA
Podostemum Ceratophyllum Michx.
UNA00018728 Coosa 20 Mar 1987 Haynes, Robert R.
8797		 UNA
Podostemum ceratophyllum Michx.
AUA_ACC_57152 Conecuh 18 Jun 1996 Diamond, Alvin R.
10334		 AUA
Podostemum Ceratophyllum Michx.
UWAL0056480 Bibb 11 Jun 2019 Keener, Brian R.
11358		 UWAL
Podostemum ceratophyllum Michx.
SAMF0000945 Tallapoosa 30 May 1989 Davenport, Lawrence J.
2667		 SAMF
Podostemum ceratophyllum Michaux
UWAL0005704 Blount 30 Jul 2009 Davenport, L.J.
3991		 UWAL
Podostemum ceratophyllum Michaux
UNA00018709 Clay 02 Jul 1979 Haynes, Robert R.
7372		 UNA
Podostemum ceratophyllum Michx.
TROY000007779 Coffee 06 Sep 1999 Martin, Brian H.
185		 TROY
Podostemum ceratophyllum Michaux
UWAL0012207 Marion 17 Jun 2013 Keener, Brian R.
7907.1		 UWAL
Podostemum ceratophyllum Michaux
SAMF0000938 Blount 30 Jul 2009 Davenport, Lawrence J.
3991		 SAMF
Podostemum ceratophyllum Michaux
TROY000037573 Coosa 12 Jul 2013 Diamond, Alvin R.
24367		 TROY
Podostemum ceratophyllum Michaux
AUA_ACC_50900 Conecuh 7 Aug 1991 Diamond, Alvin R.
7616		 AUA
Podostemum Ceratophyllum Michx.
UNA00018712 DeKalb 03 Jul 1980 Meigs, Russell A.
930		 UNA
Podostemum ceratophyllum Michx.
AUA_ACC_10830 Macon 30 Jun 1959 Farmer, Joe A.
 AUA
Podostemum Ceratophyllum Michx.
TROY000042166 Conecuh 04 Jun 2011 Diamond, Alvin R.
22175		 TROY
Podostemum ceratophyllum Michaux
SAMF0000944 Coosa 31 May 1989 Davenport, Lawrence J.
2671		 SAMF
Podostemum ceratophyllum Michaux
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