The Original Seed Pod That May Have Inspired the Heart Shape - Atlas Obscura
Cup Plant – A Thousand Flowers
The mystery of the lost Roman herb - BBC Future
Gardening with Native Plants: Silphiums in Bloom | UW Arboretum
Cup Plant (Silphium perfoliatum) | Applewood Seed Company
Silphium
Silphium perfoliatum - Cup Plant - 38 Plug Tray – New Leaf Natives
The Herbs That Got Away: Rediscovering Silphium and Other Missing Historical Plants – Herbal Academy
Cup plant Silphium perfoliatum L.: 1 – generative shoot; 2 - flower... | Download Scientific Diagram
Silphium, The Ancient 'Miracle Plant' Rediscovered In Turkey
On the hunt for the mystery herb | Kew
The mystery of the lost Roman herb - BBC Future
Cup Plant - Silphium perfoliatum | Sussex Conservation District
Silphium laciniatum, Compass Plant #1 Container - Behmerwald Nursery
Amazon.com: Outsidepride Perennial Silphium Cup Plant Garden Wild Flower Butterfly Attractant - 200 Seeds : Patio, Lawn & Garden
No, the Ancient Romans Didn't Overharvest Silphium to Extinction Because It Was a Highly Effective Contraceptive - Tales of Times Forgotten
Compass Plant, Silphium laciniatum | High Country Gardens
Silphium perfoliatum - Wikipedia
Why The Ancient Silphium Plant Was So Expensive
This Lost Roman Era 'Miracle Plant' May Have Been Rediscovered
Silphium, The Ancient 'Miracle Plant' Rediscovered In Turkey
Silphium perfoliatum #2 (Cup Plant) - Scioto Gardens Nursery
Silphium - Wikipedia
Silphium | Medicinal, Edible, Ornamental | Britannica
