Rhododon ciliatus (Benth.) Epling
EOL Text
Comments: Sparsely vegetated areas of oak woodlands and oak scrub on stabilized dunes, almost exclusively on the Carrizo Formation. Soils are deep, loose and sandy. Openings are maintained by edaphic factors and by periodic wildfires; mowing may simulate such disturbances --W. Carr pers. comm. 1999. This species also occurs on deep sands of a younger formation southeast of the Carrizo, in Austin Montgomery, and Waller Counties, as vouchered by specimens; precise habitat there is not known. Rhododon ciliatus occurs with a fairly wide variety of herbs, some of which are also endemic to the Carrizo sands.
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Comments: Newly described Texas endemic. Turner. 1995. Phytologia 78(6):448-451. Kartesz (1999) accepts. However, some floras have included it (as Stachydeoma angulata) in R. ciliatus.
Rhododon angulatus is not difficult to tell from its only relative, R. ciliatus; there are several points of clear difference. It occurs disjunctly from R. ciliatus in geologically much younger soils, with different ecological and evolutionary pressures. There is no compelling reason to treat the two as one species. Rhododon is a genus restricted to the coastal plain of Texas; there are only two species (Sorrie, B., 1999 Element Ranking Form).
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Comments: Sparsely vegetated openings in coastal live oak-dominated maritime woodlands on stabilized dunes of Pleistocene age, on former barrier islands. Soil is deep, loose and sandy. Openings are maintained by edaphic or hydrologic factors, or possibly by episodic wildfires; mowing may simulate such disturbances. --W. Carr pers. comm. 1999.
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Rhododon, called sandmint, is a genus of flowering plant in the Lamiaceae family, first described as a genus in 1939. It contains only one known species, Rhododon ciliatus, endemic to the State of Texas in the United States.[1]
References[edit]
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| Source | http://en.wikipedia.org/w/index.php?title=Rhododon&oldid=637385507 |
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 21 - 80
Comments: Over 40 total occurrences, of which 20 are current EOs spread over 9 counties.
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Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 1 - 5
Comments: Apparently no more than 10 historical occurrences, of which only 2 are current EOs. One is in relatively natural habitat at an airport, the other is in degraded habitat by a motel. In spite of limited suitable habitat, there probably are more EOs out there.
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The following is a representative barcode sequence, the centroid of all available sequences for this species.
Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
United States
Rounded National Status Rank: N3 - Vulnerable
Rounded Global Status Rank: G3 - Vulnerable
Reasons: Range small. 20 or more current populations. Few protected EOs. Threats continuous. One of only 2 species in genus, which is endemic to Texas.