Bryodesma arenicola ssp. riddellii

Family:SELAGINELLACEAE
Species:Bryodesma arenicola (Underw.) Soják ssp. riddellii (Van Eselt.) Skoda
Common Name:Riddell's Spikemoss
Habitat:Sandstone and dry sandy soils.
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Perennial
Category:Vascular
USDA Symbol:**
Plant Notes:

Riddell's Spikemoss is a native perennial in the "Spikemoss" family (SELAGINELLACEAE). It occurs on rock outcrops (sandstone or granite) in north Alabama, and on deep xeric sands in south Alabama. Riddell's Spikemoss is a clump forming perennial from underground rhizomatous stems. Aerial stems are erect and irregularly branched. Leaves (microphylls) are produced in pseudowhorls of 4. Those on the underground rhizomatous stems are white, appressed, and scale like. Those on the aerial stems are green, triangular to lanceolate in outline, pubescent or glabrous, and tightly or loosely appressed. Spores are produced in sporangia located in the axils of the upper leaves (sporophylls). Riddell's Spikemoss is listed as an S2 species in Alabama (typically 6 to 20 occurrences, few remaining individuals, acres, or miles of stream, or factors demonstrably making it very vulnerable in the state), and globally as a G4 species (imperiled globally because of rarity or very vulnerable to extinction throughout its range because of other factors).--A. Diamond

Taxonomic Notes:

Riddell's Spikemoss is one member of a complex of closely related taxa also including Spiny Spikemoss [Bryodesma acanthonota (Underwood) Škoda], and Sand Spikemoss [B. arenicola (Underwood) Soják ssp. arenicola]. The complex ranges from North Carolina to Texas and members have been treated differently by various authors. Specimens in south Alabama, especially in Geneva County, appear to be intermediate between B. arenicola ssp. riddellii and B. a. ssp. arenicola--A. Diamond & B.R. Keener

Status:Native, S2 (State Rank), G4T4 (Global Rank)
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilySELAGINELLACEAE - Spikemoss family
Genus Bryodesma
Species Bryodesma arenicola (Underw.) Soják ssp. riddellii (Van Eselt.) Skoda - Riddell's Spikemoss

Citation

Citation Bryodesma arenicola (Underwood) Soják ssp. riddellii (Van Eseltine) Skoda, Preslia 68(4): 343. 1997.
Basionym: Selaginella riddellii Van Eselt. 1918.
Type: USA: TEXAS: Waller Co.: Near Prairie View, 3 Jan 1911, Thurow 7 (holotype: US, isotype US).

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Selaginella arenicola ssp. riddellii (Van Eselt.) R.M. Tryon Selaginella arenicola subsp. riddellii (Van Eselt.) R.M. Tryon, Ann. Missouri Bot. Gard. 42(1): 24. 1955.  
Selaginella corallina    
Selaginella riddellii    

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: Cullman, Franklin, Geneva, Jefferson, Lee, Marion, Shelby, Wilcox, Winston

Counties represented by specimen data listed below:

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

Range of years during which specimens were collected: 1975 - 1975

Barcode / Accession No. County Coll. Date Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
TROY000044124 Geneva 08 Aug 2016 Byrd, Cameron
71
TROY
Bryodesma arenicola (Underw.) Soják ssp. riddellii (Van Eselt.) Skoda
UWAL0032686 Marion 28 May 2016 England, J. Kevin
6485
UWAL
Bryodesma arenicola (Underwood) Soják ssp. riddellii (Van Eseltine) Škoda
JSU107942 Winston 07 Jul 1975 Whetstone, R. David
5129
JSU
Selaginella corallina (Riddell) Wilbur & Whitson
AUA_ACC_71976 Marion 14 Jul 1982 Short, John W.
1253
AUA
Selaginella Arenicola Underwood Ssp. Riddellii (Van Eseltine) R. Tyron
UNA00057518 Marion 07 Sep 1953 Chermock, Ralph L.
s.n.
UNA
Selaginella riddellii Van Eselt.
UWAL0039575 Geneva 08 Aug 2016 Byrd, Cameron
71
UWAL
Bryodesma arenicola (Underw.) Sojak ssp. Riddellii (Van Eselt.) Skoda
AUA000035453 Wilcox 17 Mar 2010 Schotz, Alfred
2156
AUA
Selaginella Arenicola Underwood Ssp. Riddellii
UWAL0039602 Geneva 05 Nov 2015 Diamond, Alvin R.
27036
UWAL
Bryodesma arenicola (Underw.) Sojak ssp. Riddellii (Van Eselt.) Skoda
AMAL00019907 Marion 14 Jul 1982 Short, John W. (Jack)
1253
AMAL
Bryodesma arenicola (Underw.) Soják ssp. riddellii (Van Eselt.) Škoda
TROY000037284 Wilcox 15 Jun 2012 Keener, Brian R.
7309
TROY
Selaginella arenicola Underwood ssp. riddellii (Van Eseltine) Tryon
TROY000030787 Lee 16 Apr 1975 Short, John W. (Jack)
353
TROY
Selaginella riddellii van Eselstein
UWAL0015412 Franklin 22 Nov 2013 England, J. Kevin
4676
UWAL
Bryodesma arenicola (Underwood) Sojak ssp. riddellii (Van Eselt.) Skoda
UWAL0035244 Shelby 16 Aug 2013 Davenport, L.J.
5555
UWAL
Bryodesma arenicola (Underwood) Sojak ssp. riddellii (Van Eseltine) Skoda
UWAL0017328 Franklin 22 Nov 2013 England, J. Kevin
4676
UWAL
Bryodesma arenicola (Underwood) Sojak ssp. riddellii (Van Eselt.) Skoda
TROY000046435 Geneva 05 Nov 2015 Diamond, Alvin R.
27036
TROY
Bryodesma arenicola (Underw.) Soják ssp. riddellii (Van Eselt.) Skoda
UNA00057517 Jefferson 02 Aug 1953 Doster, G.
s.n.
UNA
Selaginella riddellii Van Eselt.
UNA00051272 Lee 16 Apr 1975 Short, John W. (Jack)
353
UNA
Selaginella riddellii Van Eselt.
UWAL0012094 Wilcox 15 Jun 2012 Keener, Brian R.
7309
UWAL
Bryodesma arenicola (Underwood) Sojak ssp. riddellii (Van Eselt.) Skoda
UWAL0049478 Wilcox 17 Mar 2010 Schotz, Alfred
2156
UWAL
Bryodesma arenicola (Underwood) Sojak ssp. riddellii (Van Eseltine) Skoda
AUA000040666 Cullman 14 Sep 1933 Wolf, Wolfgang
AUA
Selaginella Arenicola Underwood
ALNHS00006756 Geneva 11 Sep 2019 Barger, T. Wayne
SP#4882
ALNHS
Bryodesma arenicola (Underwood) Sojak ssp. riddellii (Van Eselt.) Skoda
AUA_ACC_31680 Lee 16 Apr 1975 Short, John W.
353
AUA
Selaginella Arenicola Underwood Ssp. Riddellii (Van Eselt.) R. Tryon
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