Part 99 (1/2)

1. D. chrysanthemodes, Lag. Nearly smooth, diffusely branched (6--18'

high); leaves opposite, pinnately parted, the narrow lobes bristly-toothed or cut; rays few, scarcely exceeding the involucre.--Roadsides, and banks of rivers, Minn. to Ill., Tenn., and southwestward. Aug.--Oct.

66. aNTHEMIS, L. CHAMOMILE.

Heads many-flowered, radiate; rays pistillate or (in n. 1) neutral.

Involucre hemispherical, of many small imbricated dry and scarious scales shorter than the disk. Receptacle conical, with slender chaff at least near the summit. Achenes terete or ribbed, glabrous, truncate; pappus none or a minute crown.--Branching strong-scented herbs, with finely pinnately dissected leaves and solitary terminal heads; rays white; disk yellow. (???e??, the ancient Greek name of the Chamomile.)

A. CoTULA, DC. (MAY-WEED.) Annual, acrid; rays mostly neutral; receptacle without chaff near the margin; pappus none; leaves finely 3-pinnately dissected. (Maruta Cotula, _DC._)--Common by roadsides.

(Nat. from Eu.)

A. ARVeNSIS, L. (CORN CHAMOMILE.) p.u.b.escent _annual or biennial_, resembling May-weed, but not ill-scented; leaves less finely 1--2-pinnately parted; chaff of the receptacle lanceolate, pointed; pappus a minute border.--Waste places; rare. (Adv. from Eu.)

A. n.o.bILIS, L. (GARDEN CHAMOMILE.) More downy and _perennial_, pleasantly strong-scented; sterile shoots depressed or creeping; leaves very finely dissected; chaff of the receptacle blunt; pappus none.--Established near Lewiston, Delaware, _Nuttall._ (Adv. from Eu.)

67. ACHILLeA, L. YARROW.

Heads many-flowered, radiate; the rays few, fertile. Involucral scales imbricated, with scarious margins. Receptacle chaffy, flattish. Achenes oblong, flattened, margined; pappus none.--Perennial herbs, with small corymbose heads. (So named because its virtues are said to have been discovered by _Achilles_.)

1. A. Milleflium, L. (COMMON YARROW or MILFOIL.) Stems simple; _leaves twice-pinnately parted_; the divisions linear, 3--5-cleft, crowded; corymb compound, flat-topped; _involucre oblong; rays 4--5, short_, white (sometimes rose-color).--Fields and hills; common. Green and more glabrate in fields in the Atlantic States, and perhaps in such cases introduced. Aug. (Eu.)

A. PTaRMICA, L. (SNEEZEWORT.) _Leaves simple, lance-linear_, sharply serrate with appressed teeth; corymb loose; _rays 8--12, much longer than the broader campanulate involucre_; flowers white.--Ma.s.s., Mich., etc.; rare. Apparently indigenous on the Lower St. Lawrence. (Adv. from Eu.)

68. MATRICaRIA, Tourn. WILD CHAMOMILE.

Heads many-flowered; rays pistillate, or wanting. Scales of the involucre imbricated, with scarious margins. Receptacle conical, at least in fruit, naked. Achenes 3--5-ribbed, wingless; pappus a membranaceous crown or border, or none.--Smooth and branching herbs (ours annuals or biennials) with finely divided leaves and single or corymbed heads. Rays white or none; disk yellow. (Named for reputed medicinal virtues.)

M. INODRA, L. Leaves twice-pinnately divided into fine almost filiform lobes; _heads large_, naked-peduncled, and _with many long rays_; achenes strongly 3-ribbed; pappus a short crown or border.--(Wild far northward.) Roadsides, Eastport, Maine, _Prof. Verrill_. Aug. (Adv. from Eu.)

M. DISCOiDEA, DC. Low (6--9' high); leaves 2--3-pinnately parted into short linear lobes; _heads rayless_, short-peduncled; scales oval, with broad margins, much shorter than the conical disk; achenes more terete; pappus obsolete.--Banks of the Mississippi opposite St. Louis. An immigrant from Oregon, extending eastward and becoming naturalized near railroad stations; also established in N. Europe. July--Sept.

69. CHRYSaNTHEMUM, Tourn. OX-EYE DAISY.

Heads many-flowered; rays numerous, fertile. Scales of the broad and flat involucre imbricated, with scarious margins. Receptacle flat or convex, naked. Disk-corollas with a flattened tube. Achenes of disk and ray similar, striate, without pappus.--Perennial herbs, with toothed, pinnatifid, or divided leaves, and single or corymbed heads. Rays white; disk yellow. (Old Greek name, ???s???e??, i.e. golden flower.)

C. LEUCaNTHEMUM, L. (OX-EYE or WHITE DAISY. WHITE-WEED.) Stem erect, nearly simple, naked above and bearing a single large head; root-leaves spatulate, petioled, the others partly clasping, all cut or pinnatifid-toothed; scales of the involucre with rusty-brown margins.

(Leucanthemum vulgare, _Lam._)--Fields and meadows; abundant eastward.

June, July. A pernicious weed, with large and showy heads. It occurs with abortive, deformed, or tubular and laciniate rays. (Nat. from Eu.)

C. PARTHeNIUM, Pers. (FEVERFEW.) Tall, branched, leafy; leaves twice-pinnately divided, the _divisions ovate, cut; heads corymbed_, rather small. (Leucanthemum Parthenium, _G.o.dron_.)--Escaped from gardens in some places. (Adv. from Eu.)

70. TANACeTUM, L. TANSY.

Heads many-flowered, nearly discoid; flowers all fertile, the marginal chiefly pistillate and 3--5-toothed. Involucre imbricated, dry.

Receptacle convex, naked. Achenes angled or ribbed, with a large flat top; pappus a short crown.--Bitter and acrid strong scented herbs (ours perennial), with 1--3-pinnately dissected leaves, and corymbed heads.

Flowers yellow; in summer. (Name of uncertain derivation.)