482 BOTANY. 



oblong, ciliolate ; calyx slightly hairy, the segments ohovate, similar ; ovary glabrous.— Lower Cali- 

 fornia. 



5 12. PEDUNCULATA, Bentb. Involucres few-many-flowered, 5-toothed, (usually long-) pedicelled, 

 solitary upon the di- or trichotomous branches and in the forks of the leafless small-bracted 

 loosely panicled peduncle. Mostly annuals ; leaves broad, usually rounded, radical or on a short 

 stem ; inflorescence never pubescent ; flowers mostly white or whitish. 

 » Low stemless annuals ; panicle divaricately much-branched, covered with club-shaped glands ; 

 involucres few-flowered. 



60. E. BEACHYPODUM, T. & G. Leaves loosely woolly ; panicle rigid, nearly prostrate ; pedicels not 

 exceeding the glandular 8-12-flowered (1" long) involucre ; bractlets sublinear, hirsute-ciliate ; outer 

 calyx-segments glabrous, cordate-ovate, obtuse, twice exceeding the ovate long and obtusely acuminate 

 inner ones. — S. E. California. 



61. E. GLAUDDLOSUM, Nutt. Leaves slightly hairy, green ; panicle slender, effuse ; pedicels capillary, 

 2-3" long, divaricate ; involucre i" long, very few-flowered, glandless ; calyx-segments oblong-ovate, 

 acutish, subequal, sparingly hirsute. — Eocky Mts., (Gambel.) 



* * Panicle glabrous, or the involucres and pedicels rarely very minutely glandular ; annuals, 



(E. tenellum and perhaps E. ciliatum excepted.) 

 (a.) Pedicels of the spreading much-branched many-flowered panicle rigid, sometimes subrace- 



mosely secund, soon deflexed ; involucres many-flowered, about 1" long ; calyx glabrous ; beak of 



the achenium scabrous. 



62. E. DEFLBXUM, Torr. Involucre short, exceeding the pedicels ; calyx white, the outer segments 

 rounded-cordate, the inner very small. See page 306. 



63. E. NUTANS, T. & G. Pedicels viscid, 2-3 times exceeding the broad-campanulate involucre; 

 calyx rose-colored, very obtuse at base, outer segments broad-oval, emarginate, the inner oblong, half as 

 large. See page 307. 



64. E. Watsonh, 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. 



65. E. CEENDUM, 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 wide. See page 308. 



(J.) Spreading, usually very much branched, mostly very slender ; pedicels not deflexed; involucre 

 1" long or less, few or rather many-flowered; calyx mostly very obtuse at base. 



(1.) Leaves white-woolly beneath, mostly floccose above ; calyx not exceeding the coarsely 5-6- 

 toothed involucre ; glabrous or slightly pilose at base ; bracts usually woolly within. 



(1^) Pedicels but 1-.5" long and with the panicle rather rigid ; calyx glabrous, lobes very unequal. 



66. E. EOTUNDIFOLIUM, Bcuth. Panicle much branched from the base, a span high ; leaves soon 

 naked above ; involucres broad-campanulate ; bractlets sparingly plumose ; calyx white, only 6-cleft, 

 the outer segments dilated fan-shaped, retuse, the inner narrowly oblong. — W. Texas ; New Mexico. 



(V'.) Pedicels slender, mostly capillary, those in the forks i-lj' long ; cyme slender, di-trichotomons, 

 with the scape a span high, in depauperate specimens subsimple ; leaves mostly -J' broad or less. 



67. E. Thuebeki, 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; bractlets nearly wanting; calyx white, very minutely pubescent at base, 5-parted, the segments 

 very unequal and pandurate, the outer much dilated and rounded above, finely webby in the middle, 

 the inner small and subhastate-lanceolate. — S. California ; S. Arizona. 



68. E. Thomasii, Torr. Bracts at the nodes very small ; involucre few-flowered, about i" long ; 

 bractlets chaffy, long villous on the margin ; calyx white or yellowish, finely hispid at base, the seg- 

 ments subpandurate, equal in length, slightly dilated above, very obtuse, the outer at length subcordate 

 at base, the inner but half as wide. — S. California ; S. Arizona. 



69. E. PUSILLUM, T. & G. Calyx yellow, subglandular-puberulent, the segments nearly similar, 

 obovate. See page 308. 



70. E. EENIKORMB, Torr. Leaves reniform or rounded-cordate, covered with very soft dense white 

 wool; bracts small, woolly ; involucres broad-campanulate, not glandular, 8-12-flowered ; calyx glab- 

 rous, white or pinkish, segments ovate, the inner sliglitly smaller.— California; W. Ai'izona. 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, |-1' long 



