28. Erig'eron. L. Fleabane

1. E. Canaden'sis, L. (Horse-weed. Butter-weed.) Kays white, but very inconspicuous, shorter than their tubes. Heads very small, numerous, in panicled racemes. Stem 1-5 feet high, erect and wand-like, bristly-hairy. Leaves linear, mostly entire. - Common in burnt woods and new clearings.

2. E. acris, L. Rays purplish or bluish, about the same length as the copious simple pappus. Heads several or many, small, at length corymbose, hirsute. Stem 10-20 inches high, pubescent or smoothish. Leaves mostly lanceolate, entire. A set of pistillate flowers within the circle of ray-flowers. - Atl. Prov. and N. W.

3. E. bellidifo'lius, Muhl. (Robin's Plantain.) Rays bluish-purple, numerous. Heads medium-sized, few, on slender corymbose peduncles. Stem hairy, producing offsets from the base. Radical leaves spathulate or obovate, toothed above the middle; stem-leaves oblong, few, sessile or partly clasping, entire. - Thickets.

4. E. hyssopifo'lius, Michx. Rays rose-purple or whitish. Stem slightly pubescent, slender, 6-12 inches high, from slender rootstocks. Leaves very many, short, linear. Heads small, terminating the slender naked branches. Pappus simple. - Atl. sea-coast and northward.

5. E. caespito'sus, Nutt. Stem dwarf, tufted, from, a stout rootstock, more or less hoary-pubescent. Rays white, 40-50, narrow. - N. W.

6. E. Philadel'phicus, L. (Common Fleabane). Rays rose-purple, very numerous and narrow. Heads small, few, in corymbs. Stem hairy, with numerous stem-leaves. Radical leaves spathulate and toothed; the upper ones clasping by a heart-shaped base, entire. - Moist grounds.

7. E. Strigo'sus, Muhl. (Daisy Fleabane.) Bays white, conspicuous, numerous. Pappus plainly double. Stem and leaves roughish with minute appressed hairs, or nearly smooth. Lower leaves spathulate and slender-petioled, entire or nearly so, the upper lanceolate, scattered. - Dry fields and meadows.

8. E. glabell'us, Nutt. Rays purple, very many, much longer than the hoary-hispid involucre. Stem 6-15 inches high, stout, smooth below, bearing 1-7 large heads on the naked summit. Pappus double. Leaves smooth but ciliate, the upper oblong-lanceolate and pointed, sessile or clasping; the lower petiolate, spathulate. - N.W.

Var. as perus, has very rough leaves and stem.

9. E. an'nuus, Pers. (Larger Daisy Fleabane.) Rays white, tinged with purple. Pappus double. Stem rough with spreading hairs. Leaves coarsely toothed; the lower ovate, tapering into a margined petiole; the upper ovate-lanceolate. Heads corymbed. - Fields and meadows.

29. Grinde'lia

Willd. G. squarro'sa, Dunal. Leaves spathulate to linear-oblong. Heads large, terminating the leafy branches. - Dry prairies, N.W.; also at Ottawa.

30. Gutierre'zia

Lag. G. Eutha'miae, Torr, and Gr. Not more than 8 inches high. - Dry plains, N.W.

31. Hele'nium

L. Sneeze-Weed. H. autumna'le, L. (Sneeze-weed.) Stem nearly smooth. Leaves lanceolate, toothed. Disk globular. - Low-river- and lake-margins.

32. Chrysan'themum

Tourn. Ox-eye Daisy. 1. C. Leucan'themum, L. (Leucanthemumvulgare,~La,m.) (Ox-eye Daisy. White-weed.) Stem erect, naked above, bearing a single large head. Leaves pinnatifid or cut-toothed, the lowest spathulate, the others partly clasping. - Pastures and old fields.

2. C. Parthe'nium, Pers. (Feverfew.) Stem branching, leafy. Leaves twice-pinnately divided, the divisions ovate, cut. Heads corymbed. - Escaped from gardens.

3. C. Balsam'itae, L. (Costmary.) A garden-escape, smooth, with pleasant odour. Leaves pale, oblong, somewhat toothed. Heads small, pale yellow.

33. Bellis

Tourn. Daisy. B. perennis, the true Daisy, a native of the Old World, is a low stemless herb. It is an uncommon garden escape. The heads are many-flowered with numerous pistillate rays. The scales of the involucre equal, in about 2 rows, herbaceous. Receptacle conical. Pappus wanting.

34. Matricaria

Tourn. Wild Chamomile. M. inodo'ra, L. Leaves twice-pinnately divided into very narrow lobes. Heads large, naked-peduncled, the rays many and long. - Chiefly Atl. Prov.

35. An'themis. L. Chamomile

1. A. Cot'ula, DC. (Maruta Cotula.) (May-weed.) Stem branching. Leaves thrice-pinnate, finely dissected. Odour disagreeable. Rays soon reflexed. - Roadsides everywhere.

2. A. arven'sis, L. (Corn Chamomile.) Resembling the last, but the leaves are not so finely dissected, and the odour not so unpleasant. - Atl. Prov., rare.