482 
BOTANY. 
oblong, ciliolate; calyx slightly hairy, the segviieuts ohovate, similar; ovnry glabrous, — Lower Cali- 
fornia. 
$ 12. PEDUNCULATA, Beutli. Involucres few-many-llowereil, .^)-toothctl, (nsnally long-) pedicelled, 
solitary upon the di- or tvichotomons branches and in tlie forks of the leafless sniall-bracted 
loosely panicled peduncle. Mostly anuuals ; leaves l»roiid, usually rounded, radical or on a short 
stem ; inflorescence never xmbescent ; flowers mostly white or whitish. 
* Low steniless annuals ; panicle divaricately much-branched, covered Avith club-shaped glands ; 
involucres few-flowered. 
60. E. BRAciiYPODUM, T. & G. Loavcs loosely woolly ; panicle rigid, nearly prostrate; pedicels not 
exceeding the glandular 8-12-flowered (1" long) involucre; bractlets snblinear, hirsute-ciliate ; outer 
calyx-segments glabrous, cordate-ovate, obtuse, twice exceeding the ovate long and obtusely acuminate 
inner ones. — S. E. California. 
61. E'. Gi^iNDUi.osuM, Nutt. Leaves slightly hairy, green ; panicle slender, elfuse ; pedicels capillary, 
2-3" long, divaricate ; involucre long, very few-flowered, glaudless ; calyx-segments oblong-ovate, 
acntisli, subequal, sparingly hirsute. — Rocky 3*Its., (Gambel.) 
* * Panicle glabrous, or the involucres and pedicels rarely very minutely glandular ; annuals, 
(E. tenellum and perhaps E. cillatiim excepted.) 
(a.) Pedicels of the spreading much-branched many-flowered panicle rigid, sometimes subrace- 
mosely secuud, soon deflexed; involucres mauy-flow^red, about 1" long; calyx glabrous; beak of 
the acliciiimu scabrous. 
G2. E. DEi LKXUM, Torr. Involucre short, exceeding the iiedicels; calyx white, the outer segments 
rounded-cordate, the inner very small. See page 306. 
63. E. KUTAXS, T. & G, Pedicels viscid, 2-3 times exceeding tlie broad-cam panulate involucre ; 
calyx rose-colored, very obtuse at base, outer segments broad-oval, emargiuate, the inner oblong, half as 
large. See page 307. 
64. E. Watsonii, T. & G. Pedicels smooth, 2-5 times exceeding the narrow- or clavate-campanu- 
late involucre; calyx rose-colored and white, obtuse at base, segments nearly equal, oval, slightly retuse. 
See page 307. 
()5. E. CKRNUUM, Nutt, Pedicels smooth, 2-4 times longer than the campanulate involucre ; calyx 
white or pinkish, with an acute top-shaped base, outer segments square, emarginate, the inner oblong, 
half as wulr. See page 308. 
(/a) Spreading, usually very much branched, mostly very slender; pedicels not deflexed; involucre 
1" long or less, few or ratber many-flowered ; calyx mostly very obtuse at base. 
(1.) Leaves white-woolly beneath, mostly floccoso above ; calyx not exceeding the coarsely 5-6- 
toothed involucre ; glabrous or slightly pilose at base ; bracts nsnally woolly within, 
(!»,) Pedicels but 1-5" long and with tlie panicle rather rigid ; calyx glabrous, lobes very unequal. 
66. E. KOTuxDiFOLiUM, Bcuth. Panicle much branched from the base, a span liigli ; leaves soon 
naked above; involucres broad-campanulate ; bractlets sparingly plumose; calyx white, only 6-cleft, 
the outer segments dilated fan-shaped, retuse, tlie inner narrowly oblong. — W. Texas ; New Mexico. 
(1^.) Pedicels slender, mostly capillary, those in the forks i-li' long ; cyme slender, di-trichotomous, 
with the scape a span high, in depauperate specimens subsimple ; leaves mostly i' broad or less. 
67. E. TiiURBKRi, Torr. Leaves usually rugose ; scape 1-2' high ; bracts in threes or fours, conspic- 
uous and calyx-like ; involucre broadly topshaped-campanulate, 10-18-flowered, often obscurely gland- 
ular; bractb-ts nearly wanting; calj'x white, very niiuutely pubescent at base, 5-partod, the segments 
very unequal aiul pautlnrate, tlio outer much dilated and rounded above, finely webby in the uiiddh", 
the inner suiall and suMuistate-Iaueeolate. — S. Caliturnia ; S. Arizona. 
68. E. Tiro.MAsii, Ttivr. Eracts at the nodes very small; involucre few-flowered, about 4" long; 
]ir;i(i!rrs chafiy. long villous on the margin; caivK white or yellowish, finely liispid at base, tlio seg- 
uiciifs >nl>]iaii<luiatc, ecjiial in length, -li 1 ," ' : above, very obtuse, the outer at length sui)cordate 
at h:\sv. the iiittcr hut lialt" as wide Arizona. 
6D. E. Pi;8iLLUJr, T. & O. Cai\x y Huw. >ui)- laudular-puberulent, the segments nearly similar, 
obovate. See page 308. 
70. E. I;K\^F()I;:^n^. Torr. Leaves reniform or I'ounded-cordate, covered with very soft dense white 
wool; bracts small, woolly ; involncres bioad-eanipanulate, not glandular, 8-12-flowered ; calyx glab- 
rous, white or pinkish, segments ovate, the inner slightly smaller. — California; W. Arizona. See 
page 308. 
(2.) Leaves pubescent, sometimes glabrate, not woolly nor tomentose, long-petioled ; panicle taller, 
upon a rather rigid often fistulous scape, the pedicels divaricate, capillary and glabrous, l-P long 
