I really don’t know Jack still? do you?
Maybe @spatheandspadix might shed some light on this one.
perhaps y’all have noticed extreme variations in populations of this classic spring plant.
Here is this one:
Narrow spathed, cupped, vibrant color, acuminate and small. Potentially A. acuminatum???
Ahh yes, a classic to run into while out and about in the forest in May, I still don’t know what subspecies this is and its been in my drafts since like 2016, odd enough I didn’t think this complex would be unresolved this long considering the fact that cernua complex, rudbeckia fulgida complex, and eastern Viola complex(shout outs to Iris Copen and Dr. Harvey Ballard the homies from OU and ODNR/ONAPA) have all had papers since then and so far 3 subspecies have been noted and gone through chromosome analysis and ITS analysis. Non of which are the jack you see above.
Jack in the Pulpit is an incredibly variable and diverse complex/sect. that we see often enough. Morphological variants and subspecies are very noticeable when they occur due to multiple characteristics such as soil specific populations and floral ridges, dwarf like traits, or tapering like you see above.
Flora of the south eastern USA states this:
“ A genus of about 150-170 species, of Asia, e. North America, e. Africa, and Arabia. Infrageneric taxonomy follows Ohi-Toma et al. (2016). The taxa of the Arisaema triphyllum complex have been variously treated as species, subspecies, varieties, and forms. They are here treated as species with relatively subtle morphological distinctions; they are broadly sympatric, and sometimes occur together in mixed populations with little sign of introgression or hybridization and seem to behave as biological species. Arisaema quinatum (mixed leaved jack) has often been treated as a full species and seems to warrant that status. Arisaema stewardsonii (big ridged hooded bog jack) seems amply distinct in morphology, northern distribution, and boggy habitat. Arisaema triphyllum (common jack) is tetraploid and does not produce fertile seed when crossed with the other (diploid) taxa, including A. pusillum (dwarf alkaline Jack), with which it is broadly sympatric (Treiber 1980). The size (though diploid), strongly attenuated spathe apex, and geographic integrity seem good reason to accord A. acuminatum (narrow pointed long spathe jack) species status as well. Species concepts in this treatment largely follow the review by Wyatt & Stoneburner (2022).”
All of this said we still have outliers like this one.
Opening like rich mesic hillside, overall alkaline. Caldwell NP, Cincinnati Parks, Cincinnati Ohio.