Dipsacus sativus (Indian teasel)

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Dipsacus sativus (L.) Honck.

Indian teasel

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	Asteridae	A large class that encompasses asters
Order	Dipsacales	Includes viburnum, honeysuckle, snowberry, beautybush, twinflower, many others
Family	Dipsacaceae	Teasel family
Genus	Dipsacus	From the Greek dipsa, “thirst,” from the connate (joined or attached) leaf bases that in some ssp. hold water
Species	sativus	Means “that which is sown,” indicating the plant is a cultivated one

About plant names...

In California, this teasel species is considered invasive. It is a North American native.

Plants: 4-6' (1.2-1.8 m) tall, rarely up to 9' (2.7 m). Stems have prickles.

Leaves: A basal rosette of leaves

Flowers: Usually white. The involucre bracts at the base of each flowerhead spread almost straight outward, rather than bending upward. In common teasel, the bracts extend upward and even over the top of the flowerhead. The flowerhead is comprised of around 4 zillion tiny flowers. Each flower is about ¹/₃₂" (1 mm) around, with four overlapping petals that form a rough cylinder. A stigma with two lobes extends some distance from the flower, while the stamens are inside it.

Online References:

Wildflowers of the United States