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9 June 2010 Three New Taxa of Chascolytrum (Poaceae, Pooideae, Poeae) from South America
Liliana Essi, Tatiana Teixeirade Souza Chies, Hilda Maria Longhi Wagner
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Two new species and one new variety of Chascolytrum Desv. (Poaceae) are described and illustrated. Chascolytrum latifolium Essi, Souza-Chies & Longhi-Wagner and C. juergensii var. angustilemma Essi, Souza-Chies & Longhi-Wagner occur in the southern Brazilian highlands, while C. altimontanum Essi, Souza-Chies & Longhi-Wagner occurs in the Bolivian highlands. Chascolytrum latifolium is related to C. subaristatum (Lam.) Desv., but differs mainly by the wider leaf blades and by some characteristics of the palea. Chascolytrum altimontanum is related to C. paleapiliferum (Parodi) Matthei and C. subaristatum, the main differences being the presence of flattened trichomes at the lemma base and the shape of the spikelets. Specimens of all these new taxa were included in a parallel molecular analysis, with the results supporting the new taxa as genetically divergent from the closest morphologically related species. In addition, Briza juergensii Hack. is transferred to Chascolytrum for the new combination C. juergensii (Hack.) Essi, Souza-Chies & Longhi-Wagner.

Liliana Essi, Tatiana Teixeirade Souza Chies, and Hilda Maria Longhi Wagner "Three New Taxa of Chascolytrum (Poaceae, Pooideae, Poeae) from South America," Novon: A Journal for Botanical Nomenclature 20(2), 149-156, (9 June 2010).
Published: 9 June 2010

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