Polypremum procumbens L.
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Authority
Norman, E. M. 2000. Buddlejaceae. Fl. Neotrop. Monogr. 81: 1-225. (Published by NYBG Press)
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Family
Loganiaceae
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Scientific Name
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Synonyms
Polypremum linnaei Michx., Polypremum laxum Raf., Polypremum squarrosum Raf., Polypremum schlechtendalii Walp., Hasslerella rojasii Chodat
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Description
Species Description - Perennial herb with many dichasial branches 8-25 cm long forming short vegetative stems during period of dormancy. Leaves and stems slightly scabrid. Leaves sessile, linear, 5-25 x 0.5-3 mm, with acuminate apex. Flowers terminal on pseudodichotomous branches, subtended by bracts similar to leaves. Calyx 2-3 mm long, divided almost to base, lobes with strong midrib and scarious margins. Corolla 2 mm long, white, the lobes rounded, one-third the length of the tube, villous in throat. Stamens dorsi-fixed, inserted above the middle of the corolla tube. Base of ovary adnate to perianth. Capsule obovoid with 20-30 seeds per locule. Seeds translucent, 0.3-0.4 mm long, n = 10, 11.
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Discussion
Recent evidence from chloroplast DNA analysis shows a close relationship between Polypremum and Tetrachondra (Tetrachondraceae) (Oxelman et. al., 1999). I have not seen any reproductive material of the two species of Tetrachondra which are inhabitants of Patagonia, Chile, and New Zealand. The descriptions of Skottsberg (1912) and Cheeseman (1906) indicate many morphological similarities between the two genera in habit, leaf, and floral size and shape. Tetachondra lacks erect branches, the corollas lack the moniliform hairs found in the throat, and each fruit has only four seeds.
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Common Names
Llama, rustweed
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Distribution
Through much of eastern and southeastern United States, Mexico, especially along coasts, Central America, West Indies, northern South America, Paraguay, Micronesia, mostly near sea level but occasionally at higher elevations up to 3500 m (Guatemala). Flowering chiefly from March to October but occasionally also in December and January.
Mexico North America| Baja California Sur Mexico North America| Chiapas Mexico North America| Guerrero Mexico North America| Hidalgo Mexico North America| Jalisco Mexico North America| Oaxaca Mexico North America| Quintana Roo Mexico North America| San Luis Potosí Mexico North America| Sinaloa Mexico North America| Sonora Mexico North America| Tabasco Mexico North America| Tamaulipas Mexico North America| Veracruz Mexico North America| Guatemala Central America| Baja Verapaz Guatemala Central America| Chimaltenango Guatemala Central America| Chiquimula Guatemala Central America| Guatemala Guatemala Central America| Huehuetenango Guatemala Central America| Izabal Guatemala Central America| Jalapa Guatemala Central America| Quezaltenango Guatemala Central America| San Marcos Guatemala Central America| Sololá Guatemala Central America| Belize Central America| Stann Creek Belize Central America| Honduras Central America| Atlántida Honduras Central America| Colón Honduras Central America| Comayagua Honduras Central America| El Paraíso Honduras Central America| Morazán Honduras Central America| Santa Bárbara Honduras Central America| Yoro Honduras Central America| El Salvador Central America| San Salvador El Salvador Central America| San Vicente El Salvador Central America| Sonsonate El Salvador Central America| Nicaragua Central America| Managua Nicaragua Central America| Zelaya Nicaragua Central America| Costa Rica South America| Guanacaste Costa Rica Central America| Bermuda South America| Bahamas South America| Great Abaco Bahamas South America| Grand Bahama Bahamas South America| Inagua Bahamas South America| Mayaguana Bahamas South America| Andros Island Bahamas South America| Cuba South America| Piñar del Río Cuba South America| Puerto Rico South America| Colombia South America| Magdalena Colombia South America| Venezuela South America| Falcón Venezuela South America| Miranda Venezuela South America| Trujillo Venezuela South America| Zulia Venezuela South America| Guyana South America| Paraguay South America| Caaguazú Paraguay South America|