The genus Laretia Gillies & Hook. comprises a single species, L. acaulis (Cav.) Gillies & Hook., of xerophilous subshrubs that form flat compact cushions. It is endemic to southern South America and is distributed through the high Andes of San Juan and Mendoza provinces in Argentina, and Atacama to Maule regions in Chile. Descriptions of Laretia are available only from the protologue and from a few regional floras; these are not comprehensive and are based on few specimens. Moreover, the actual geographic distribution of the genus has been questioned. In this work we present a taxonomic treatment for Laretia that includes field work, analysis of the protologue, and an exhaustive revision of herbarium material. We also analyze and describe the morphology and anatomy of its fruits because of their diagnostic importance in the family. We provide a detailed morphological description, ecological and ethnobotanical information, and illustrations of the genus. Additionally, we present a map that shows the geographical distribution of Laretia, designate lectotypes for three names, and finally analyze and resolve nomenclatural problems regarding two names (Laretia compacta and Laretia yareta) that have not been included in recent treatments and require revision in order to understand the limits of the genus.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 41 • No. 3