This page is a draft, part of our ongoing wild potato project. I’ll probably be adding information to the species pages through 2020 at least, but I’m making them public since they may be useful even incomplete.

Solanum stenophyllidium

Synonyms: S. brachistotrichum, S. jamesii, S. nayaritense

Series: Stenophyllidia

EBN: 1

Ploidy: Diploid

Segregation: Disomic

Self-compatible: No

Cytoplasm Type: ?


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).

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 Germination Ploidy 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 Germination Ploidy Source

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