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Solanum stenophyllidium

Common Name(s)    
Code sph
Synonyms S. brachistotrichum, S. jamesii, S. nayaritense
Clade 1
Series Pinnatisecta
Ploidy Diploid (2x)
Self-compatible No
Cytoplasm Type  


Solanum stenophyllidium (stenophyllidium meaning narrow leaves) is a Mexican species, ranging from central Mexico north almost to the US border.  Highly variable in size and form.  Plants range about 9 to 27 inches tall.  Long, thin leaves, similar to many of the Mexican dryland species.

This species can survive frosts down to 26 degrees F (-3.5 C) (Li 1977).  Vega (1995) found that this species (as S. brachyostrichum) is less frost tolerant than domesticated potato.

Condition Level of Resistance Source
Frost Somewhat resistant Machida-Hirano 2015 (as S. brachistotrichum)

Glykoalkaloid content




Bamberg (2017) found a 56% increase in seed set in this species with supplemental applications of liquid fertilizer at four and seven weeks after potting.


Crosses with S. tuberosum

Female Male Berry Set
Seed Set Ploidy Germ Source
S. tuberosum S. stenophyllidium (as S. brachistotrichum) None  None     Jackson (1999)
S. stenophyllidium (as S. brachistotrichum) S. tuberosum None None     Jackson (1999)

Crosses with other species

Watanabe (1991) found that 25% (although only 2 plants) of varieties of this species (as S. brachistotrichum) produced 2n pollen and Jackson (1999) found 7-13%, which would be effectively tetraploid and 2EBN.

Female Male Berry Set
Seed Set Ploidy Germ Source


Solanum stenophyllidium at Solanaceae Source

Solanum stenophyllidium at GRIN Taxonomy

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