APPENDIX. 483 



or more; bracts not woolly; calyx yellowish, densely hirsute, twice longer than the vei-y small 

 few-flowered 4-5-cleft involucre, the segments similar and nearly equal. 



71. E. TRiCHOPODUM, Torr. Leaves finely pubescent or glabrate, scarcely cordate ; scape short ; 

 panicle very branching and slender. See page 309. 



72. E. INFLATUM, Torr. Leaves rather hirsute or velvety ; scape elongated, often inflated, panicle 

 rather stout and rigid, See page 309. 



(3.) Whole plant glabrous ; calyx not exceeding the very long-pedicelled few-flowered involucre. 



73. E. GoEDONi, Benth. Leaves round; peduncles several, short, repeatedly dichotomous and loosely 

 panicled above ; pedicels erect, subcapillary, 1' long or more ; involucre scarcely 1" long, turbinate- 

 campanulate, 5-toothed ; bractlets minutely glandular, outer calyx-segments ovate, the inner oblong, 

 a little shorter. — On the Upper Platte, (Gordon.) 



(c.) Perennials or biennials, less branched ; leaves not cordate ; bracts verysmall ; pedicels elongated, 

 erect ; involucres 1 J-24" long, rather many-flowered ; calyx glabrous, with a short top-shaped 

 base ; bractlets villous. 



74. E. TENELLUM, Torr. Csespitose with a much branched woody caudex ; leaves crowded, ovate or 

 rounded, white-tomentose ; scape and spreading panicle smooth ; flowers fewer in the involucre, white, 

 the segments retuse, unequal, the outer broad-obovate or rounded. — Colorado to New Mexico and W. 

 Texas. 



75. E. CILIATUM, Torr. Eadical leaves rosulate, obovate-spatnlate, ciliate on the margins and mid- 

 vein, otherwise glabrous ; the scape and few peduncles elongated ; involucre broadly campanulate, 2" 

 long ; calyx dark-red, thickish, 6-cleft, the lobes ovate, acute, the inner a little narrower and longer. — 

 N. E. Mexico. 



§ 13. PSEUDO-STIPULATA, Benth. Involucres and pedicels as in § Pedimculata, (or the alar involu- 

 cres sessile in E. divarioatum ;) stems branched, leafy ; the true cauline leaves bract-like, opposite or 

 verticillate, the axillary more developed, in pairs or fascicled ; calyx very obtuse at base, minutely 

 glandular ; achenium sharply triangular. 



76. E. AUGULOSUM, Benth. Annual, floccose-wooUy ; panicle effuse ; branches angled ; pedicels 

 filiform, widely spreading ; involucres many-flowered, short-toothed ; flowers short-pedicelled, segments 

 unequal. See page 309. 



77. E. Greggii, T. & G. Perennial, erect, about 1° high, puberulent, subglandular ; leaves spatu- 

 late, subciliate, nearly glabrous, the true cauline ones verticillate, lanceolate, herbaceous, connate into 

 a sheath at base ; pedicels subracemose, erect, about 1" long ; involucre turbinate-campanulute, 2" long, 

 many-flowered, 5-toothed ; bractlets scarious, hirsute ; calyx purplish, deeply 6-cleft, the lobes ovate- 

 oblong, similar. — Northern Mexico. 



78. E. DIVARICATUM, Hook. Annual, low, puberulent, much branched ; radical leaves ovate and spat- 

 ulate, cauline stipule-like, subulate-linear, the axillary ones similar, in pairs ; involucres very small, 

 nearly 5-parted, few-flowered, those in the forks mostly sessile; calyx-segments white, oblong, sub- 

 equal. — S. Wyoming, (Geyer.) 



§ 14. FOLIOSA, Benth. Inflorescence as in the last section ; involucre 4-8-cleft or parted, those in 

 the forks'sometimes sessile ; calyx with a' very short acute or obtuse base, 6-parted, the pedicel 

 exserted ; annuals, with leafy stems, the cauline leaves developed, mostly opposite or verticUlate, 

 the axillary similar and fascicled. 



79. E. SALSUGINOSDM, Hook. Glabrous, diffusely much-branched, 1' to a span high, leafy through- 

 out ; leaves spatulate or oblong or ' the upper linear, subfleshy ; involucre of several unequal nearly 

 distinct linear bracts, few-flowered, sessile in the forks or a few of them on filiform peduncles ; calyx 

 subherbaceous, minutely roughish, the segments oblong, subequal, closed in fruit upon the sharply tri- 

 angular achenium. — Southern Wyoming. 



80. E. Abertianum, Torr. Villous or pubescent, paniculately branched, erect, leafy ; leaves ovate 

 or snbcordate, petioled, the upper lanceolate or linear, subsessUe ; involucres more or less peduncled, 

 many-flowered, with 5-8 linear leafy segments ; calyx petalbid, glabrous, rose-colored, outer segments 

 rounded, deeply cordate, becoming nearly 2" long, the inner linear-oblong, retuse.— W. Texas to 

 Arizona. 



81. E. PHARNACBOIDES, Torr. 1° high, pubescent, very slender, effusely panicled, internodes elon- 

 gated; cauline leaves narrow-linear, more or less tomentose; pedicels capillary, smooth; involucres 

 5-8 cleft, 8-12-flowered ; calyx petaloid, glabrous, outer segments broadly ovate, bigibbous at base in 

 fruit, the inner longer, oblong-linear, retuse ; anthers dark.— New Mexico ; Arizona. 



82. E. SPERGCLiNTjM, Gray. Panicle more effuse ; leaves narrow-linear, sparingly hirsute and gland- 

 ular; involucres on very slender pedicels, 4-oleft, 1-2-flowered; calyx-segments equal, cuneate-oblong. 

 See page 310. 



