These include crested cinquefoil or crested potentilla (Potentilla cristae), Siskiyou fireweed (Epilobium siskiyouense), and McDonald's rock cress (Arabis blepharophylla var. macdonaldiana), a perennial found in conifer forests of California and Oregon.
Rare perennials include the Siskiyou fireweed (Epilobium siskiyouense), and several types of lousewort (Pedicularis).