Biological Sciences Department
Index Herbariourm
Key to the 7 Genera of Kentucky Solanaceae

Note that there are multiple species of Physalis and Solanum found in Kentucky. The reference images provided here may thus look different than the species you have. For larger images, return to the main Solanaceae page.
Click the [.I.] (for "Image") to see examples of traits.

1a)   Flowers from leaf axils [.I.], solitary or in small (2-15) clusters ............................................................... 2

.....2a)   Flowers yellow, often spotted at base [.I.]; fruit a berry hidden by an inflated calyx [.I.] ................. ............. ............................................................................................................................ Physalis [Further info]

.....2b)   Flowers purple or white, occasionally spotted at base; fruit a capsule or berry, in some hidden ..............by calyx ..................................................................................................................................................... 3

..........3a)   Flowers under 2.5 cm long or wide .................................................................................................. 4

...............4a)   Plants woody; flowers purple; in clusters of 5-15; calyx not inflated in fruit .............. Lycium

...............4b)   Plants herbaceous; flowers white; in clusters of 1-3; red-orange calyx inflated around berry ................................................................................................................................................ Physalis alkekengi

..........3b)   Flowers over 2.5 cm long and/or wide ............................................................................................. 5

...............5a)   Leaves without teeth; fruit a small (under 1 cm), smooth capsule ............................. Petunia

...............5b)   Leaves with teeth; fruit various, but larger than 1 cm ............................................................... 6

....................6a)   Flowers 5 cm or more long; fruit a spiny capsule ...................................................... Datura

....................6b)   Flowers under 5 cm long; fruit dry and berry-like, hidden by lobed calyx ......... Nicandra

1b)   Flowers from stems between leaves (internodes) [.I.] or terminal (at stem tips) [.I.], in clusters of few ... .... to many (20+) ................................................................................................................................................ 7

.....7a)   Star-shaped flowers in lateral clusters (off sides of stems); anthers often touch to form cone; fruit ..............a berry; no simple leaves longer than 15 cm .............................................. Solanum [Further info]

.....7b)   Trumpet-shaped flowers in terminal clusters (at stem tips); anthers not touching; fruit a ..............capsule; leaves often longer than 15 cm ............................................................................. Nicotiana

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