Bahia, COMPOSITE. 333 



B. Bigelovii, Gray. Slender, a foot high, diffuse, strigose-puberulent : leaves 3-parted and 

 the divisions sometimes 2-3-parted into linear-liliform segments and lobes : peduncles elon- 

 gated, filiform : involucre liemispherical, 2 lines liigli ; its bracts 8 or 9, oval and tapering to 

 both ends, viscidly hirsute : rays as many, oblong : tube of disk-corollas hirsute with viscid 

 hairs ; throat broadly cyathiform : paleaj of the pappus broadly cuneate-obovate, half the 

 length of the corolla-tube, callous-thickened only at base. — IJot. Mex. Bouud. 96. ScJil-iihn'a 

 {Achi/ropuppus) Bigelovii, Gray, Proc. Am. Acad. ix. 199; Proc. Am. Acad. xix. 1. c. — 

 S. W. Texas, in the valley of the Limpio, Bigelow. 



B. Neo-Mexicana, Gray. A span or more high, minutely puberulent: leaves 3-7 -parted 

 into narrow linear divisions ; uppermost little shorter than the slender peduncles : involucre 

 of about 10 sparingly pubescent spatulate bracts: rays none : disk-corollas small, with glan- 

 dular tube, almost equalled by the obovate palete of the pappus, which are much thickened 

 at and near the base. — Proc. Am. Acad. xix. 27. Schkuhria Neo-Mt-xicana, Gray, PI. Fcndl. 

 96, & Proc. Am. Acad. ix. 199. — Northern New Mexico and S. Colorado, Fendler, Bigelow, 

 Parry, &c. 



* * Leaves mainlj- opposite, with linear divisions : flowers perhaps white : palcaj of the pappus 

 lanceolate and with a complete costa. 



B. Woodhousii, Gray. Low, cinereous-puberuleut : peduncles hardly longer than the 

 heads : leaves thickish, 3-parted, and tbe middle divisions sometimes with a pair of lateral 

 lobes : involucre 3 lines high ; its bracts 8 or 9, oblong-ol)Ovate, obtuse ; raj^s 8 or 9, with 

 oblong ligules a line or two long, hardly surpassing the disk-flowers : paleaj of the pappus 

 8 to 10, with hyaline mai'gins and a strong opaque costa, which reaches the acute apex. — 

 Proc. Am. Acad. xix. 28. — Achi/ropapptis Woodhousii, Gray, Proc. Am. Acad. vi. 546. 

 Schkuhria Woodhousii, Gray, Proc. Am. Acad. ix. 199. — Northern part of New Mexico, Z'r. 

 Woodhouse. 



* * * Leaves all or mostly alternate, naked-petioled, 2-3-ternately divided or parted; the divis- 

 ions from linear-spatulate to obovate, comparatively short: heads loosely cvmose-paniculate at 

 the naked summit of the erect stems, hemispherical, yellow-flnwered, with oblong or obovate 

 exserted rays: paleaa of the pappus oblong to narrowly lanceolate, with a distinct procurrent or 

 excurrent costa, or the pappus wanting : akenes tetragonal-clavate, or those of the ray slender 

 obpyramidal with 4 sides. 



•i— Tube of the disk corollas glandular but not hirsute; lobes ovate or oblong, shorter than the 

 dilated throat: pappus present. 



B. pedata, Gray, a foot or two high, cinereous-puberuleut : leaves pedately divided, com- 

 monly into 3 petiolulate obovate or cuueate segments, of which the lateral are 2-parted and 

 the middle 3-7-lobed ; the lobes obovate or broadly oblong, short : heads 5 lines high : bracts 

 of the involucre oblong, obtuse, shorter than the disk: rays about 12, oblong: palea; of the 

 pappus 10 to 12, s])atulate-oblong, with costa vanishing near the obtuse or retuse siimmit. — 

 PI. Wright, i. 132, & Proc. Am. Acad. xix. 28. Schkuhria (Achijropappus) pedata, Gray, 

 Proc. Am. Acad. ix. 199. — S. W. Texas, on the Limpio and Kio Grande, Wright, Bigelow. 



B. biternata, Gray. More pubescent and slender: leaves biternately dissected into linear 

 and obtuse or somewhat spatulate segments and lobes, the primary ones slightly petiolulate : 

 heads 4 lines high: bracts of the involucre obovate: rays 8 or 10, broadly obovate: pale* 

 of the pappus 12 to 14, longer and narrower, about equalling the corolla-tube, those of tlie 

 outer flowers obovate and obtuse, with costa evanescent below the apex ; of the inner flowers 

 longer, elongated-lanceolate, and with costa e.xcurrent into an awn-like cusp ; in intermediate 

 flowers of intermediate character. — PI. Wright, ii. 95, & Proc. Am. Acad. 1. c. Schkiihria 

 (Arhi/ropappus) biternata. Gray, Proc. Am. Acad. ix. 199. — Borders of W. Texas and adja- 

 cent New Mexico, Wright, Bigelow, Thurber. May pass into the preceding. 



H— -i— Tube of disk-corollas viscid-hirsute; the limb cleft into narrow lobes which are much longer 

 than the throat and little shorter than the tube: pappus none. 



B. chrysanthemoides, Gray. Taller and stouter, 1 to 4 feet high, puberulent or below 

 glabrous, aljove with tlie flowering branches and short peduncles glandular-pubescent and 

 viscid: leaves 1-3-ternately divided or parted; the lobes from oblong and obtuse to nearly 

 linear: heads 5 or 6 lines high ami broad: bracts of the involucre 16 to 20, crowded, from 

 oblong-lanceolate to obovate-oblong, most of them conspicuously acuminate : rays as man}-, 

 obovate-obloug : akenes obscurely striate on the four narrow faces, the whole apex covered 



