1198 CARDUACEAE 
45. Solidago celtidifdlia Small. Similar to S. rugosa in habit. Stems often more 
purple and more prominently striate and rather less pubescent: leaves numerous; blades 
thick and firm, somewhat pubescent, those of the basal and lower cauline spatulate to oval- 
or oblong-spatulate, 6-13 em. long, those of upper cauline oval to ovate or rarely oblong, 
2-6 cm. long, or shorter on the branches, crenate or appressed serrate-crenate, obtuse or 
acutish, rugose-veiny at least in age: heads numerous, secund on the more or less spread- 
ing branches of the panicle: involucres cylindric, or campanulate at maturity, 3-3.5 mm. 
high, about 2 mm. thick; bracts narrowly linear, obtuse or acutish, keeled on the back: 
achenes pubescent. 
In sandy soil or dry woods, Alabama and Florida to Arkansas and Texas. Summer and fall. 
46. Solidago ulmifólia Muhl. Stems 5-12 dm. tall, striate or striate-angled, glabrous 
below the branches of the inflorescence : leaves relatively few ; blades thinnish, more or 
less pubescent, those of the basal and lower cauline spatulate, mainly 1-2 dm. long, nar- 
rowed into petiole-like bases, those of the upper cauline elliptic to oblong or elliptic- or 
oblong-lanceolate, acute or somewhat acuminate, more or less sharply serrate, conspicuously 
veined beneath : heads few or numerous, secund on the spreading or recurved branches of 
the inflorescence : involucres cylindric, not spirally twisted, 3-3.5 mm. high, 2 mm. thick ; 
bracts mainly linear, obtuse or obtusish, slightly keeled along the back: achenes pubescent. 
In dry soil and woods, Maine to Minnesota, Georgia, Kansas and Texas, Summer and fall. 
47. Solidago microphylla Engelm. Stems 8-13 dm. tall, striate-ridged, more or 
less branched, glabrous : leaves rather numerous, deep green ; blades somewhat pubescent, 
often becoming thick and firm, those of the basal and lower cauline leaves spatulate to ob- 
lanceolate-spatulate, 6-11 cm. long, rather shallowly serrate, narrowed into petiole-like 
bases, those of the upper cauline elliptic to oblong or oblong-ovate, acute or slightly acumi- 
nate, shallowly toothed or entire: heads numerous, often very numerous, secund on the 
more or less elongated curved slightly pubescent branches of the inflorescence : involucres 
cylindric-turbinate, 4-4.5 mm. high, about 2 mm. thick, not spirally twisted ; bracts 
linear-lanceolate to narrowly linear, acute: achenes pubescent. 
Indry soil, Kansas to Arkansas and Texas. Summer and fall. 
48. Solidago Hélleri Small. Stems 7-16 dm. tall, striate-angled, purplish, glabrous : 
leaves rather numerous, deep green ; blades slightly pubescent beneath, especially about 
the veins; those of the cauline leaves elliptic to oblong, 3-10 em. long, acute, serrate with 
often appressed teeth, rigidly ciliate: branches of the inflorescence bearing numerous 
narrow leaves mainly 1-1.5 cm. long: heads numerous, secund ‘on the elongated curved 
pubescent branches : involucres cylindric, spirally twisted, 6-7 mm. high, 2.5 mm. thick ; 
bracts linear to linear-lanceolate, acute or acutish, keeled on the back: achenes pubescent. 
Insandy woods, Arkansas and adjacent Texas. Summer and fall. 
49. Solidago Ellióttii T. & G. Stems 8-18 dm. tall, striate or striate-angled, simple 
or branched above: leaves numerous, often approximate ; blades thickish, glabrous or 
merely puberulent on the veins beneath, those of the basal and lower cauline leaves spatu- 
late, mostly 1-2 dm. long, shallowly serrate, those of the upper cauline elliptic to eae 
lanceolate, shallowly toothed or merely undulate, all minutely veiny beneath : hea 8 
numerous, secund and crowded on the approximate pubescent branches of the inflorescence : 
involucres campanulate, 4~5 mm. high, about 2 mm. thick ; bracts mainly linear, obtuse, 
somewhat keeled along the back: achenes finely pubescent. 
Een In swamps, mainly near the coast, New Hampshire and Massachusetts to Georgia. Summer and 
all. 
50. Solidago Bodttii Hook. Stems 6-15 dm. tall, purple, striate-ridged, piana 
below the inflorescence, usually widely branched above: leaves relatively few ; blades 
thickish, glabrous, those of the basal and lower cauline spatulate to oblong- or SA AES 
spatulate, shallowly but sharply and sometimes finely serrate, narrowed into up ms 
bases, those of the upper cauline leaves gradually smaller, narrowly elliptic to elip 1C 
lanceolate, acute or acuminate, shallowly toothed or undulate : heads rather aarp 
secund but not crowded on the usually greatly elongated and widely spreading pu t 3 
branches of the inflorescence: involucres broadly campanulate, 3.5-4 mm. high, a Bs 
mm. thick ; bracts linear to oblong-linear, decidedly obtuse, angled on the back : achen 
pubescent. 
In woods, Maryland to Florida and Texas. Summer and fall. iall 
51. Solidago strigòsa Small. Stems 6-13 dm. tall, finely pubescent, or AE id 
glabrous below the inflorescence, purple-tinged, striate-ridged : leaves few ; blades eee i 
those of the basal and lower cauline ovate, oval or elliptic, 4-12 cm. long, Sea cal li 
serrate-crenate, or more serrate west of the Mississippi River, narrowed into slender Pai as 
like bases, those of the upper cauline much smaller, relatively narrower, ovate to € p 
