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Key to Wahlenbergia

Campanulaceae

Wahlenbergia

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1 Hypanthium narrowly obconic to nearly cylindric, 3.5-4.5 mm long at anthesis, lengthening to as much as 12 mm in fruit; fruit opening by 2 terminal pores; perennial
1 Hypanthium ellipsoid or ovoid, 1.5-3 mm long at anthesis, lengthening to as much as 7.5 mm in fruit; fruit opening by 3 terminal pores; annual