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Solanum commersonii

Common Name(s) Commerson potato, Commerson’s nightshade
Code cmm
Synonyms S. henryi, S. mechonguense, S. nicaraguense, S. ohrondii
Clade ?
Series Commersoniana
Ploidy Diploid (2x), Triploid (3x)
Self-compatible No
Cytoplasm Type  


Solanum commersonii distribution Map note

Solanum commersonii (commersonii, in honor of French naturalist Philibert Commerson) is a species of Argentina, Paraguay, Uruguay, and Brazil.  This species can survive frosts down to 23 degrees F (-5 C) (Li 1977).  Vega (1995) found that this species is more frost tolerant than domesticated potato and nearly as tolerant as S. acaule.

There are reports of this species being cultivated as an edible in France in the early twentieth century, where it produced “abundant, large, and palatable” tubers (Newman 1904).

Condition Level of Resistance Source
Late Blight Somewhat resistant Machida-Hirano 2015
Wart Somewhat resistant Machida-Hirano 2015
Scab Somewhat resistant Machida-Hirano 2015
Soft Rot / Blackleg Somewhat resistant Machida-Hirano 2015
Colorado Potato Beetle Somewhat resistant Machida-Hirano 2015
Root Knot Nematode Somewhat resistant Machida-Hirano 2015
Frost Resistant Machida-Hirano 2015

Glykoalkaloid content


From The Country Gentleman, 1906


Chen (1976) found that this species reaches its maximum frost resistance (about 11 degrees F, -11.7 C) following a three week period of shortening photoperiod and reducing day and night temperatures.


Crosses with S. tuberosum


Female Male Berry Set Seed Set Germination Ploidy Source
S. tuberosum S. commersonii Minimal None     Jackson (1999)
S. commersonii S. tuberosum None None     Jackson (1999)

Crosses with other species

Bamberg (1995) found that at least some accessions of S. commersonii flower better at high temperatures than under typical temperate growing conditions.  Flowering was better when greenhouse temperatures exceeded 100 degrees F for several hours during the day.

Watanabe (1991) found that 4.8% of varieties of this species produced 2n pollen and Jackson (1999) found 1-10%, which would be effectively tetraploid and 2EBN.

Female Male Berry Set Seed Set Germination Ploidy Source