Fig 177. [Wild Teasel. Dipsacus sylvestris] Huds.
![[Wild Teasel. Dipsacus sylvestris]](#1525880611323293367_fig-177.jpg.id-7130009037302200317.wrap-0.html.html){kind=link}
Wild Teasel. Dipsacus sylvestris Huds. Achene brown, minutely hairy, 4 mm. long, oblong, square in cross-section, with four vertical ribs on the angles and four on the sides. Seed suspended, anatropous, supplied with endosperm. Introduced from Europe. A weed requiring two years from seed to seeding.
COMPOSITE FAMILY. COMPOSITAE.
Fig 178. [Yarrow. Milfoil. Achillea Millefolium] L.
![[Yarrow. Milfoil. Achillea Millefolium]](#1525880611323293367_fig-178.jpg.id-1740025032788780370.wrap-0.html.html){kind=link}
Yarrow. Milfoil. Achillea Millefolium L. Flowers white; achenes white to gray, finely striate lengthwise, flattened, oblong, tapering at the lower end, straight or curved. 2–2.3 long. Most likely introduced from Europe.
