Figure 2 from: Schuette S, Folk RA, Cantley JT, Martine CT (2018) The hidden Heuchera: How science Twitter uncovered a globally imperiled species in Pennsylvania, USA. PhytoKeys 96: 87-97. https://doi.org/10.3897/phytokeys.96.23667

Figure 2 Images a–d Flowers of four Heuchera taxa overlapping in range in PA, WV, and VA. Flowers are shown at the original angle on the inflorescence; with the exception of the wild accession in (d), all flowers were obtained under common greenhouse conditions after at least a year of cultivation a H. alba (North Fork Mountain, WV; Folk 63 [deposited at OS]) b H. pubescens (Pilot Mountain, NC; Folk 96 [deposited at OS]) c Heuchera × hispida (=H. americana var. hispida; near Sandstone Falls, WV; Folk 104 [deposited at OS]) d H. americana var. americana (Blue Ridge Parkway at Twenty Minute Cliff, VA; Folk 102 [deposited at OS]). Images e–h H. alba plants growing at North Fork Mountain, WV (e, g) and Shikellamy State Park, PA (f, h). All photos R. Folk, except (f) and (h) by C. Martine.