Epilobium brachycarpum (Tall willowherb)

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Epilobium brachycarpum C. Presl

Tall willowherb, tall annual willowherb, panicled willowherb, tall fireweed

Kingdom	Plantae	Plants, but not fungi, lichens, or algae
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Magnoliopsida	Dicotyledons—plants with two initial seed leaves
Subclass	Rosidae	Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
Order	Myrtales	Includes myrtles, leadwoods, loosestrifes, pomegranates, evening primroses, many others
Family	Onagraceae	Willowherb/evening primrose family
Genus	Epilobium	From Greek epi, “upon,” and lobos, “a pod or capsule,” because the flower is attached directly to the ovary
Species	brachycarpum	“Having short fruit”

About plant names...

Tall willowherb is native to North America, found in much of Canada and in the western United States.

Identification: Plants are up to 6' (1.8 m) in height. Leaves are up to 2½" (6.3 cm) long, narrow like grass blades, though somewhat wider in the middle, and often curving. Flowers are about ⅜" (9.5 mm) across, white to pink or purple. Flowers have four petals, but they usually look as if they have eight, because each petal is deeply notched. Seeds are suspended from white, fluffy parachutes.

Online References:

CalPhotos

Wildflowers in Santa Barbara

Plants of the Kaweah River Delta Region

Forestry Images

The Jepson Manual

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