|Passiflora incarnata (2014-120) in the West Knobs region|
|The Walk Across Kentucky staff collecting in the Pennyrile region fall 2014. The disturbed field and wooded edges here supported populations of purple passionflower.|
It seems safe to say that P. incarnata prefers full sun, but will tolerate moderate shade. Like so many species of vines and lianas, it grows masterfully in disturbed areas – and that is not necessarily a complement to the plant. Climbers invest far less resources in their stems than other plants, as a result of their nature as structural parasites. This allows them to grow quickly, overtopping both themselves and other species while forming a thick mass of tangled leaves and stems (think Kudzu).
|Overlapping stems of purple passionflower. Note the two glands where the leaf meets the petiole - distinctive for this species.|
|Passiflora lutea var. glabriflora (2004-003) in the Shawnee Hills region|
|Yellow (left) and purple passionflower (right). Yellow passionflower has smaller features, an entire leaf margin (vs. serrate), and rounded lobes (vs. pointed).|
|P. lutea ascending the lower limbs of an oak. Tendrils grasp both the oak twigs and other vine stems for support.|
|P. lutea young leaf and flower buds|