| Family1 | Species1 | Family2 | Species2 | SCUS score | Similarity |
| Solanaceae | Solanum pennellii | Malvaceae | Gossypium raimondii | 9.19 | Highly Similar |
| Solanaceae | Solanum pennellii | Asteraceae | Helianthus annuus | 5.92 | Moderately similar |
| Solanaceae | Solanum pennellii | Malvaceae | Herrania umbratica | 8.30 | Similar |
| Solanaceae | Solanum pennellii | Euphorbiaceae | Hevea brasiliensis | 7.70 | Similar |
| Solanaceae | Solanum pennellii | Poaceae | Hordeum vulgare | 4.28 | Dis similar |
| Solanaceae | Solanum pennellii | Euphorbiaceae | Jatropha curcas | 8.68 | Similar |
| Solanaceae | Solanum pennellii | Asteraceae | Lactuca sativa | 7.78 | Similar |
| Solanaceae | Solanum pennellii | Fabaceae | Lupinus angustifolius | 8.71 | Similar |
| Solanaceae | Solanum pennellii | Euphorbiaceae | Manihot esculenta | 8.06 | Similar |
| Solanaceae | Solanum pennellii | Fabaceae | Medicago truncatula | 9.72 | Highly Similar |
| Solanaceae | Solanum pennellii | Cucurbitaceae | Momordica charantia | 8.17 | Similar |
| Solanaceae | Solanum pennellii | Musaceae | Musa acuminata subsp. malaccensis | 6.05 | Moderately similar |
| Solanaceae | Solanum pennellii | Solanaceae | Nicotiana attenuata | 9.26 | Highly Similar |
| Solanaceae | Solanum pennellii | Solanaceae | Nicotiana sylvestris | 9.35 | Highly Similar |
| Solanaceae | Solanum pennellii | Solanaceae | Nicotiana tabacum | 9.31 | Highly Similar |
| Solanaceae | Solanum pennellii | Solanaceae | Nicotiana tomentosiformis | 9.34 | Highly Similar |
| Solanaceae | Solanum pennellii | Poaceae | Oryza brachyantha | 4.22 | Dis similar |
| Solanaceae | Solanum pennellii | Poaceae | Oryza sativa Japonica Group | 4.24 | Dis similar |
| Solanaceae | Solanum pennellii | Poaceae | Panicum hallii | 3.88 | Dis similar |
| Solanaceae | Solanum pennellii | Poaceae | Panicum virgatum | 4.08 | Dis similar |