Flora of Argentinian Northwest

Gymnocalycium baldianum, the spider-cactus or dwarf chin cactus, is a species of flowering plant in the cactus family Cactaceae, native to the Catamarca Province in Argentina.

Denmoza is a monotypic genus of cactus with the sole species Denmoza rhodacantha, synonym Echinopsis rhodacantha, native to northwest Argentina.

Setiechinopsis is a monotypic genus of cacti. Its only species, Setiechinopsis mirabilis, is native to Argentina.

Gymnocalycium saglionis, the giant chin cactus, is a globular Gymnocalycium species endemic to northwest Argentina.

Denmoza is a monotypic genus of cactus with the sole species Denmoza rhodacantha, synonym Echinopsis rhodacantha, native to northwest Argentina.

Rebutia minuscula is a species of cactus from South America found in northern Argentina and Bolivia. It is the type species of the genus Rebutia. As its synonym Rebutia senilis it has gained the Royal Horticultural Society's Award of Garden Merit. Its cultivars 'Krainziana', 'Marsoneri' and 'Violaciflora' are also listed as having gained the Award of Garden Merit. The status of the species of Rebutia is currently uncertain; indeed the genus as defined by Anderson (2001) has been shown to be polyphyletic. Anderson describes R. minuscula as consisting of globe-shaped stems with a diameter of up

Parodia chrysacanthion, the golden powder puff, is a species of cactus in the genus Parodia, native to northwest Argentina. It has gained the Royal Horticultural Society's Award of Garden Merit.

Nierembergia veitchii is a species of plant in the family Solanaceae. The species is commonly called the trailing cup plant. The species is found in north eastern parts of Argentina. The plant can cause rapid hypercalcemia and widespread metastatic calcification.

Gymnocalycium hossei is a species of cactus in the genus Gymnocalycium, endemic to Bolivia.

Gymnocalycium bayrianum is a species of Gymnocalycium from Argentina.

Echinopsis angelesiae, synonym Soehrensia angelesiae, is a species of cactus native to Argentina.

Chiliophyllum is a monotypic genus of flowering plants in the aster family, Asteraceae, containing the single species Chiliophyllum densifolium. It is endemic to Argentina, where it is known only from Mendoza Province. Its local common names include romero del piche and romero pichi. This species is a member of the Chiliotrichum Group in the tribe Astereae of the aster family. This group includes many related "shrubby daisies" native to South America. Chiliophyllum densifolium is the type species of its genus, described from Mendoza Province in 1862. Two more species were added to the genus,

Arachis monticola is a close relative of the domesticated peanut (Arachis hypogaea). Besides the peanut, it is the only other tetraploid species in the genus Arachis. It is thought to be the immediate wild ancestor of peanut, although it may be a weedy form, descended from cultivated peanuts.

Aa hieronymi is a species of orchid in the genus Aa. It is found in northwestern Argentina.

Tephrocactus bonnieae is a species of plant in the family Cactaceae. It is endemic to Argentina. Its natural habitat is hot deserts. It is threatened by habitat loss.

Tephrocactus alexanderi, also known as Tephrocactus geometricus, is a species of cactus under the genus Tephrocactus. It is also classified under the subfamily Opuntioideae. It is native to Argentina Catamarca (Angostura de Guanchim and Tinogasta) and close to the Bolivian border, where it is exposed to extreme heat and an arid climate. T. geometricus receives its name from the Greek word γεωμετρία (geometria), meaning geometry.

Gymnocalycium berchtii is a species of Gymnocalycium from Argentina.

Gymnocalycium alboareolatum is a species of cactus in the genus Gymnocalycium, endemic to Argentina.

Echinopsis densispina, is a species of Echinopsis cactus found in Argentina.

Echinopsis chrysantha, is a species of Echinopsis cactus found in Argentina.

Echinopsis chamaecereus is a species of cactus from northwestern Argentina and Bolivia. Synonyms include Chamaecereus silvestrii. It has been called the peanut cactus. This plant should not be confused with Echinopsis silvestrii, a synonym of Echinopsis albispinosa, a species with a very different appearance.

Acanthocalycium leucanthum is a species of flowering plant in the cactus family Cactaceae from Argentina.

Tillandsia albertiana is a species of plant in the genus Tillandsia. It is endemic to the Salta Province of northern Argentina.

Rebutia fabrisii is a species of Rebutia found in Argentina.

Gymnocalycium uebelmannianum is a species of Gymnocalycium from Argentina.

Gymnocalycium oenanthemum is a species of flowering plant in the family Cactaceae, endemic to Argentina. A slightly flattened sphere growing to 12 cm (4.7 in), it has 10–13 ribs, each containing a row of tubercles with radial spines. In summer it bears a wine-red or pink daisy-like flower.

Gymnocalycium neuhuberi is a species of cactus in the genus Gymnocalycium, endemic to Bolivia.

Echinopsis huascha, synonym Soehrensia huascha, is a species of Echinopsis in the family Cactaceae, found in north western Argentina.

Tillandsia guelzii is a species in the genus Tillandsia. It is endemic to Jujuy Province of northern Argentina.

Schreiteria is a monotypic genus of flowering plants belonging to the family Montiaceae. It is represented by the single species of Schreiteria macrocarpa (Speg.) Carolin. It is native to north-western Argentina.