Hansen's Northwest Native Plant Database


Trillium parviflorum (Sessile Trillium)

Kingdom

 Plantae Plants

Subkingdom

 Tracheobionta Vascular plants

Superdivision

 Spermatophyta Seed plants

Division

 Magnoliophyta Flowering plants

Class

 Liliopsida Monocotyledons

Subclass

 Liliidae

Order

 Liliales

Family

 Liliaceae Lily family

Genus

 Trillium L. trillium

Species

 Trillium parviflorum Soukup smallflower wakerobin

A beautiful 12 trillium.

When this species was first identified as unique and formally received its name, it was spread out in Washington and Oregon. At this writing, the only known plants are in Marion and Polk counties in Oregon. The Washington Natural Heritage Program listed it as "Endangered, threatened and sensitive vascular plants of Washington" on 20 October 2002.

Occurring in the understory of hardwoods--usually Oregon Ash (Fraxinus latifolia) and sometimes Red Alder (Alnus rubra) or Garry oak (Quercus garryana var. garryana), this trillium needs shade and moist soil.

It will even tolerate seasonal flooding.

The leaves are somewhat mottled and often larger than those of Western Trillium.

The flowers sit directly on the three leaves. Their white color fades to purple with age - spectacular.

The seed pods are plump with a purple dye.

 
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