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++ Leaves cuneate at base, tapering into the petiole, very numerous and incised or deeply 
toothed, the upper about equaling the glomerate clusters in their axils: much branched 
and shrubby. 
2. B. baccharidea Gray. Leaves coriaceous, resinous-atomiferous and very gluti- 
nous, rhombic-ovate or oblong, and with 2 to 5 strong teeth on each margin, much 
reticulated: heads 15 to 18-flowered.—Mountains west of the Pecos. 
3. B. laciniata Gray. Leaves thin, puberulent and somewhat scabrous, ovate- 
cuneate and oblong, laciniate-toothed or lobed, obscurely veiny: heads 9 to 12-flow- 
ered.—Mountains west of the Pecos. 
* * Leaves sessile, subsessile, or the lower short-petioled (all petioled in no. 4, var.) 
_+ Leaves mainly opposite: pappus-bristles merely scabrous or serrulate under a lens. 
4. B. oliganthes Gray. Cinereous-puberulent, 3 to 6dm. high, woody at base: 
leaves coriaceous, oblong to linear, obtusely and often obscurely serrate, 2.5 to 5 cm. 
long, canescent and the veins very prominently reticulated beneath: peduncles mostly 
elongated, with 1 to 3 heads 12 mm. long.—A species of southern Arizona and Mexico, 
but represented in the Chenate Mountains of western Texas by var. CREBRA Gray, 
which has petioled more broadly oblong or ovate rather coarsely toothed less canes- 
cent leaves. 
5. B. parvula Gray. Minutely scabro-puberulent, low, woody at base: leaves del- 
toid-ovate, coarsely few-toothed, green both sides, barely 12mm. long; the upper 
oblong, sparse and much smaller: peduncles few and slender, with a single head 
10mm. long.—Mountains west of the Pecos. 
6. B. cylindracea Gray and Eng. Cinereous-pubescent, somewhat scabrous: stem 
herbaceous to the base, mostly stout and strict, 6 to 12dm. high: leaves oblong-ovate 
to ovate-lanceolate, mostly obtuse at both ends, obtusely serrate, thickish, about 
5em. long: heads 12 to 16 mm. long, numerous in a virgate racemiform thyrsus: in- 
volucre cylindrical, closely imbricated,-—Hillsides and thickets of central and western 
Texas, varying into var. LAXA Gray, which is paniculately branched, the branches 
bearing numerous smaller (10 to 12mm.) loosely disposed heads, and the leaves of 
the branches either subsessile or abruptly petioled. 
. ++ Leaves alternate: pappus barbellate: stems herbaceous. 
7. B. Riddellii Gray. Minutely cinereous or puberulent, glabrate: stem strict and 
stout, 6 to 12 dm. high, exceedingly leafy to the summit: leaves oblong-lanceolate, 
sparingly denticulate, often entire, 16 to 36 mm. long: heads numerous, crowded in a 
leafy spiciform thyrsus, 15 to 20-flowered, 8 to 10mm. long: pappus barbellulate 
under a lens.—River banks, central and southern Texas. 
8. B. brachyphylla Gray. Minutely puberulent: stems slender, 3 to 6dm. high, 
bearing afewracemosely paniculate slender-pedunculate heads: leaves oblong-lanceo- 
late, entire or sparingly serrate, 12mm. (or the larger 25 mm.) long: heads 9 to 12- 
flowered, 10mm. long: pappus-bristles almost plumose under a lens.—Rocks and 
ravines west of the Pecos. 
10. CARPOCH ATE Gray. 
Perennial herbs or suffrutescent plants, glabrous or nearly so, with 
opposite and entire sessile 1 to 3-nerved but nearly veinless leaves, soli- 
tary or somewhat clustered discoid 4 to 6-flowered heads terminating 
leafy or pedunculiform branches, rose-colored (perfect) flowers and in- 
volucre, naked receptacle, few acuminate andimbricate involucral bracts, 
slender 10-striate achenes, and pappus of long subulate erose scarious 
scabrous-awned scales, with 1 to 5 small nearly nerveless and pointless 
ones. 
