480 
BOTAKY. 
ate heads termiuating tlie dichotomovis or cymose-uinl>ellate peduucles, the alar (or apparently lat- 
eral) ones sessile ; bractlets plumose. Shrubby, leafy ; leaves small, alternate and fascicled in the 
axils, hoary beneath, nsiially revolute-margined ; flowers -white or pinkish.— Coast of California, 
mostly southern. 
35. E. ciNERF.UJi, Beutli. 3-5° high, loosely branched, pubenileut ; leaves orbicular to ovate, ^-1' 
long, undulate, short-petioled, but little fascicled ; flowers not very numerous, silky-villous ; peduncles 
elongated, nearly naked, dichotomous; heads few ; radicle slightly inflexed ; cotyledons oval. 
36. E. PARTiFOLiUM, Sui. At first webby- woolly ; leaves small, very numerous npon the branches, 
ovate or ovate-lanceolate, nudulate, with an abrupt or obtuse balfc ; peduncles di-trichotomous ; flowers 
glabrous, very numerous, the involucres often subracemose along the lengthened axis. 
37. E. FASCicuLATUM, Beuth. Leaves numerous, oblong-linear or liuear-spatulate, strongly revo- 
lute ; peduncles slender, naked, usually nmbellately divided into 3-6 rays ; flowers glabrous or puberu- 
lent, very numerous.— Variable. See page 302. 
§ 10. COEYMBOSA, Benth. Involucres many-flowered, 5-6-toothcd, cymoso by the repeated umbel- 
late and 2-3-chotomous subdivision of the summit of the naked peduncle, the pedicels short or 
none ; calyx glabrous, 6-parted, tho inner segments usually smaller, leaves mostly narrow and at 
or near tho base of the stems alternate, more or less white-woolly, not cordate. 
* Shrubs^ or the stems sometimes short and but little woody ; calyx glabrous within, the segments 
nearly alike ; ovary often scabrous above on the angles, 
(fl.) Branches woody, erect or ascending, leafy, terminated by the cyme-bearing peduncle ; calyx 
■white or pink, rarely yellow, often a little thickened at base, lobes obovate, at least the inner ones 
emarginate or retuse. 
38. E. ERic^roLiUM, T. & G. Depressed, very much branched and very leafy ; leaves very numer- 
ous on the branchlets, 2" long, subulate-linear and teretely revolutc, glabrous above, white-woolly be- 
neath; cyme scarcely exceeding the leaves, of 3-7-crowded somewhat tomcntose pentagonal involucres ; 
calyx white, li" long.— Arizona. 
39. E. coRYMBOsr:sr, Benth. li-2o .high, floccose-woolly ; branches leafy; leaves oblong; cyme 
broadly corymbose, many-flowered. See page 303. 
40. E. MiCROTiiECUM, Nutt. Low, rarely 1° high, much branched from the base, more or less floc- 
cose-tomcntoso ; loavi^s oblong to linear ; cyme crowded or open.— Very variable. See page 303. 
(h.) Bv;u;rli. h ai v. less woody, very short or caespitose-depressed ; peduncle terminal, u.akod, elon- 
gated, herbaceous, and with the 5-toothed involucre glabrous or glabratc ; calyx-segments nearly 
equal ; leaves narrow, attenuate into a slender petiole. 
41. E. nKFA iCATTi.E, Nutt. Low ; leaves nmch crowded on tho caudox-like branches ; scapes rigid ; 
flowei's often yellow. See page 304. 
42. E. i.<)\ciioriiYr,r,r>[, T. & G. Taller aud scarcely woody at the leafy base; leaves not much 
crowdc<l, lanceolate or broad-linear, white-woolly beneath ; cyme repeatedly trichotomons and panicle- 
like : l(,\v< r bi'acfs filiform, the upper sul)ulate; flowers white, with obovate retuse segments.— New 
M<'xico. 
* Annual : sf( nis loosely bianehed, leafy only below : calyx pink, glabrous within, the segments 
obovate and nearly e(inal ; bractlets scarcely bearded. 
4;5. E. l urNH ATiM. T. & G. Loosely floccose-woolly, !- high ; leaves subfascicled, spatulate or ob- 
long, W long with the ^hni.ler petiole; peduncles long, naked; cyme loose, di-trichotomous; involucres 
rather few. nuiny-lhnvered, 2" long, oblong-oanii>anulatp, truncate; bracts verv small.— Mt. Diablo, 
(lb-ewer.) 
■ Annual, white-woolly; sten).> tall, strict, Jealy: cyme decompound, many-flowered; calyx 
Avhite, Webbed within at base with long wool, the outer segments much tho larger ; bractlets finely 
plumose. 
44. v.. ANM r\r. Xutt. Leaves oblong, attonu.ate at base, mostly petioled ; involucres woolly, glab- 
rous within, shortly .Vfothed : , niter « alyx-segnie.its broadly obovate, the inner oblong.— From Nebraska 
to Arkansas, Texas, New M.^Kico and Chihuahua. 
4o. E. Mri.Trt i.oiu M. r.eiith. L(.aves oblong and lanceolate, nudulate, the cauline sessile, obtuse or 
anrieled at base ; invohures .-)-l(.hod, often glabrate, webbed within : outer calyx-segments rounded oval, 
becoming deeply cordate, the inner nearly linear.— .Vrkansas to Louisiana aud Texas. 
§ 11. \ IRGAT A, Benth. Involncr.-s sessile ahmg one side of the usually virgate branches of the pan- 
icle, mostly small in- luirrow ; calyx G-parted, usually glabrous. 
* Perennial, a l. w shrubby at base, woolly; iiower.s white or pinkish, glabrous, many in the 
involucre. 
