smooth or containing a few minute oppressed bristles,
apex truncate, bearing a whorl of bristles, the longest having been
rubbed off. Native of this country. Compare the above description with
that of Erigeron annuus. Common in waste places.

[Illustration: Fig. 196.]

=Daisy Fleabane.= _Erigeron ramosus_ (Walt.) B. S. P. Flowers white;
achenes nearly identical with those last described, Erigeron annuus,
bristles shorter, less diverging, surface bearing more minute appressed
hairs when seen under a lens. Native to this country and prominent in
some thin meadows.

[Illustration: Fig. 197.]

=Sweet Everlasting.= _Gnaphalium polycephalum_ Michx. _Gnaphalium
obtusifolium_ L. Outer scales of the head thin, white, stiff; achenes
yellowish white or brown, slightly flattened, smooth, oval or oblong,
.5-.7 mm. long. Native to this country. Not often troublesome.

Much practice with a good lens and careful comparisons with other small
achenes will be necessary in identifying such specimens as are furnished
by this species.

[Illustration: Fig. 198.]

=Low Cudweed.= _Gnaphalium uliginosum_ L. Outer scales of the head thin,
brown, more or less wooly; achenes .4-.6 mm. long, yellowish white to
brown, slightly flattened, smooth, narrowly oblong .4-.6 mm. long.
Achenes narrower and rather shorter than those of G. obtusifolium.
Native to this country. Not of high rank as a weed.

[Illustration: Fig. 199.]

=Broad-leaved Gum Plant.= _Grindelia squarrosa_ (Pursh.) Dunal. Flowers
yellow; achenes creamy white or light brown, very variable in
appearance, more or less flattened, often 4-angled, straight to much
curved, narrowed at the base, apex truncate, often concave with a
distinct marginal rim, some of them not very unlike those of Canada
thistle, some of them smooth, others finely grooved or ridged
lengthwise, others somewhat wrinkled, 2.5-3 mm. long. Occasionally
introduced from the west with seeds of grasses or clover. Usually not
persistent in Michigan.

=Artichoke.= _Helianthus tuberosus_ L. Flowers yellow; achenes black,
shiny more or less, slightly flattened, pubescent with very short hairs,
with four obtuse angles, narrowly obovate, 6-7 mm. long, one side of the
smaller end projecting beyond the other side. Native of this country;
cultivated by Indians.

[Illustration: Fig. 200.]

=Golden Mouse or Orange-Ear Hawkweed. Devil's Paint-Brush.= _Hieracium
aurantiacum._ Flowers orange yellow; achenes jet black, oblong,