Part 89 (2/2)

Heads many-flowered, radiate; the rays numerous, pistillate. Scales of the involucre herbaceous, equal, in about 2 rows. Receptacle conical, naked. Achenes obovate, flattened, wingless, and without any pappus.--Low herbs (all but our single species natives of the Old World), either stemless, like the true _Daisy_, B. PERENNIS (which is found as an occasional escape from cultivation), or leafy-stemmed, as is the following. (The Latin name, from _bellus_, pretty.)

1. B. integriflia, Michx. (WESTERN DAISY.) Annual or biennial, diffusely branched (4'--1 high), smoothish; leaves lanceolate or oblong, the lower spatulate-obovate; heads on slender peduncles; rays pale violet-purple.--Prairies and banks, Ky. and southwestward.

March--June.

20. APHANoSTEPHUS, DC.

Involucral scales in few series, broadly lanceolate, the outer shorter.

Achenes prismatic, the broad truncate apex bearing a short coroniform pappus. Otherwise as Bellis.--Southwestern leafy-stemmed and branching p.u.b.escent herbs, with solitary terminal daisy-like heads. (?fa???, _inconspicuous_, and st?f??, _crown_; in allusion to the pappus.)

1. A. Arkansa.n.u.s, Gray. Diffuse, 1 high; leaves oblong-spatulate to broadly lanceolate, the lower often toothed or lobed; rays white to purple, ' long; pappus mostly 4--5-lobed.--Plains of Kan. and southward.

21. CHaeTOPaPPA, DC.

Heads several-flowered, radiate; disk-flowers often sterile. Involucral bracts imbricated in 2 or more rows, the outer shorter. Receptacle flat, naked. Achenes fusiform or compressed; pappus of 5 or fewer thin nerveless paleae, alternating with rough bristly awns, or these wanting.--Low southwestern branching annuals, with narrow entire leaves and solitary terminal heads; ray white or purple. (?a?t?, _a bristle_, and p?pp??, _pappus_.)

1. C. asterodes, DC. Slender, 2--10' high, p.u.b.escent; involucres narrow, 2” long; rays 5--12; achenes p.u.b.escent.--Dry grounds, Vernon Co., Mo., and southward.

22. BOLTNIA, L'Her.

Heads many-flowered, radiate; the rays numerous, pistillate. Scales of the hemispherical involucre imbricated somewhat in 2 rows, appressed, with narrow membranaceous margins. Receptacle conical or hemispherical, naked. Achenes very flat, obovate or inversely heart-shaped, margined with a callous wing, or in the ray 3-winged, crowned with a pappus of several minute bristles and usually 2--4 longer awns.--Perennial and bushy-branched smooth herbs, pale green, with the aspect of Aster; the thickish leaves chiefly entire, often turned edgewise. Flowers autumnal; disk yellow; rays white or purplish. (Dedicated to _James Bolton_, an English botanist of the last century.)

[*] _Heads middle-sized, loosely corymbed._

1. B. asterodes, L'Her. Stems 2--8 high; leaves lanceolate; involucral scales ac.u.minate; pappus of few or many minute bristles and 2 awns or none. (B. glastifolia, _L'Her._, the awned form.)--Moist places along streams; Penn. to Ill., and southward to Fla. Sept., Oct.--Var.

DECuRRENS, Engelm., a large form with the leaves alate-decurrent upon the stem and branches. Mo. (_Eggert_).

2. B. latisquama, Gray. Heads rather larger; involucral scales oblong to ovate, obtuse or mucronate-apiculate; pappus-awns conspicuous.--W. Mo.

and Kan.

[*][*] _Heads small, panicled on the slender branches._

3. B. diffusa, L'Her. Stem diffusely branched; leaves lance-linear, those on the branchlets very small and awl-shaped; rays short, mostly white; pappus of several very short bristles and 2 short awns.--Prairies of S. Ill. (_Vasey_), and southwestward. Aug.--Oct.

23. TOWNSeNDIA, Hook.

Heads many-flowered, the numerous ray-flowers (violet to white) in a single series, fertile. Involucre broad, the lanceolate scariously margined scales imbricated in several series. Receptacle flat, naked.

Achenes obovate or oblong, flattened, with thickish margins and beset with forked-capitellate hairs; pappus a single row of long awns or coa.r.s.e rigid bristles, or reduced in the ray to chaffy scales.--Low scarcely caulescent herbs, with linear to spatulate entire leaves and large heads. (Named for _David Townsend_, botanical a.s.sociate of Dr.

Darlington of Penn.)

1. T. sercea, Hook. Acaulescent silky-p.u.b.escent perennial; heads sessile, solitary or few, --1' high; ray-pappus mostly bristly.--Dry plains, central Neb., north and westward. April, May.

24. SERICOCaRPUS, Nees. WHITE-TOPPED ASTER.

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