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Arisaema triphyllum

Family
Araceae
Common Name(s)
Jack-in-the-pulpit
Synonyms
This guide also include the very similar Green dragon, Arisaema dracontium
Flowering Time
May
Fruit/Seed Maturation Sign
Berries turn red
Fruit/Seed Collection Dates
Mid August to early September
Notes

Experimental seed addition in a small field study resulted in establishment in 33-46% of plots after three years (Brudvig et al. 2011) (seeds were sown fresh). 

Transplants in an Iowa field study had 88% survival after 7 years (Mottl et al. 2006), and 70% after 7 years in a Michigan study (DeJong et al. 2017), suggesting that transplanting could be a successful method of re-introduction. Self-sows and can spread by seed once established (Mottle et al. 2006).

Seed output moderate; low vegetative spread (Barkely 1986, Gleason and Cronquist 1991); root a corm with fibrous roots (Runkel and Bull 2009); smaller corms form on the larger central corm (Sperka 1973).

Green dragon (Arisaema dracontium) has very similar morphology and features (Sperka 1973).

 

Jack-in-the-pulpit (Arisaema triphyllum)

Jack-in-the-pulpit fruit (Arisaema triphyllum)

Seed Cleaning
Remove seeds from pulp; store seeds in cold, moist sphagnum
Storage
Tolerates dry storage (Cullina 2000), but may not tolerate long-term dry storage, indicated by very poor field germination (Mottl 2000)
Restoration Potential
Medium