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Pennisetum polystachyon subsp. setosum

Pennisetum ruppelii

Penstemon × hybridus

Penstemon acuminatus var. latebracteatus

Penstemon albomarginatus

Penstemon angustifolius var. caudatus

Physcomitrium hookeri

Physcomitrium pygmaeum

Physcomitrium pyriforme

Penstemon crandallii subsp. crandallii

Cenchrus nervosus

Bent-spike fountain grass

Cenchrus purpureus

Barner grass

Penstemon caespitosus

Mat penstemon

Penstemon putus

Penstemon rattanii subsp. rattanii

Penstemon rhizomatosus

Plagiochila sullivantii var. spinigera

Penstemon tiehmii

Penstemon triflorus subsp. triflorus

Penstemon tubiflorus var. achoreus