1200 CARDUACEAE 



less distinctly 3-ribbed than the lower : heads numerous, slender-peduncled, secund on the 

 slender glabrous recurving branches of the inflorescence : involucres narrowly cylindric, 

 4-4.5 mm. high, barely 2 mm. thick ; bracts linear-subulate, acute, rounded on the back : 

 achenes finely pubescent. 



In dry soil, northern Texas. Summer and fall. 



59. Solldago austrina Small. Stems 5-18 dm. tall, glabrous, green or purple-tinged, 

 striate-ridged : leaves rather numerous ; blades thick, glabrous, those of the basal and lower 

 cauline leaves elongated, broadly linear to oblong, or sometimes slightly broadest above or 

 below the middle, remotely and appressed -serrate or with flaring teeth, narrowed into 

 petiole-like bases, those of the upper cauline much smaller, erect or appressed to the stem, 

 mainly linear-lanceolate or oblong-lanceolate, entire or indistinctly toothed : heads numer- 

 ous, secund on the short more or less recurved glabrous branches of the panicle : involucres 

 campanulate, fully 5 mm. high, 3-3.5 mm. thick ; bracts linear-oblong to linear, obtuse, 

 slightly keeled on the back : achenes pubescent. 



In swamps, middle North Carolina to Georgia. Summer and fall. 



60. Solidago neg!6cta T. & G. Stems 5-12 dm. tall, glabrous, purple or purple- 

 tinged, striate-angled or angled above : leaves rather numerous ; blades thickish, glabrous, 

 those of the basal and lower cauline leaves often much elongated, oblong or oblong-elliptic 

 to spatulate, 1-3 dm. long, serrate, narrowed into petiole-like bases, those of the upper 

 cauline much smaller, oblong, oblong-elliptic or linear-lanceolate, ascending, entire or 

 shallowly toothed, minutely veiny beneath : heads numerous, secund on the approximate 

 glabrous, more or less curved branches of the one-sided panicle : involucres campanulate, 

 fully 5 mm. high, 3 mm. thick ; bracts oblong, sometimes almost linear-oblong, obtuse, 

 rounded or slightly keeled on the back : achenes sparsely pubescent. 



In swamps, New Brunswick to Wisconsin, North Carolina and Illinois. Summer and fall. 



61. Solidago Gattingeri Chapm. Stems 5-9 dm. tall, striate, rather strict, glabrous : 

 leaves rather numerous ; blades scabrous above, those of the basal and lower cauline nar- 

 rowly spatulate, or oblong-elliptic, shallowly toothed or nearly entire, acute, narrowed into 

 petiole-like bases, those of the upper cauline leaves abruptly much smaller than those of 

 the lower, erect or appressed to the stem, linear or linear-oblanceolate or linear-lanceolate, 

 entire, acute or acuminate : heads rather numerous, secund on the ascending glabrous 

 branches of the panicle : involucres campanulate, 4 mm. high, 3 mm. thick ; bracts oblong 

 or linear-oblong, obtuse, rounded on the back : achenes glabrous. 



In dry or rocky soil, Tennessee to Missouri and Texas. Summer and fall. 



62. Solidago Miasouri^nsls Nutt. Stems 1.5-14 dm. tall, striate, glabrous : leaves 

 rather numerous ; blades thickish, glabrous or essentially so, except the ciliate margins, 

 those of the basal and lower cauline leaves mainly spatulate, often narrowly so, serrate, 

 those of the upper cauline mainly linear or linear-lanceolate, acute or slightly acuminate, 

 sharp- or appressed-serrate, sometimes with clusters of small leaves in the axils, all 3- 

 ribbed but the upper ones less distinctly so : heads numerous, rather crowded, secund on 

 the more or less curved glabrous branches of the panicle : involucres campanulate, 3.5-4 

 mm. high, 2.5-3 mm. thick ; bracts linear or oblong-linear, obtuse, rounded on the back 

 achenes finely pubescent. 



In dry soil, Manitoba to Minnesota. Tennessee, Texas and Washington. Summer and fall. 



63. Solidago pinet6rum Small. Stems 4-11 dm. tall, angled, glabrous, purple- 

 tinged : leaves rather numerous ; blades glabrous, smooth, those of the basal and lower 

 cauline broadly linear to linear-spatulate, 1-2.5 dm. long, serrate, sometimes sharply so, 

 acute or slightly acuminate, prominently 3-ribbed, narrowed into petiole-like bases, those 

 of the upper cauline leaves linear or slightly broadest above the middle, mainly entire or 

 undulate, often with clusters of smaller ones in the axils : heads numerous, secund on the 

 spreading or recurved glabrous branches of the panicle : involucres cylindric-campanulate, 

 about 4 mm. long, 2.5 mm. thick ; bracts mainly linear, sometimes broadly so, obtuse, 

 thickened along the back : achenes almost glabrous. 



In pine woods, middle North Carolina. Summer and fall. 



64. Solidago serdtina Ait. Stems 6-25 dm. tall, more or less striate, glabrous : 

 leaves rather numerous ; blades thinnish, glabrous or slightly pubescent, those of the 

 upper cauline leaves elliptic, oblong or oblong-lanceolate, mostly 5-15 cm. long, acuminate, 

 serrate, prominently 3-ribbed : heads numerous, secund on the spreading or recurved 

 pubescent branches of the panicle : involucres broadly campanulate, 4 mm. high, about 3 

 mm. thick ; bracts mainly linear, obtuse, rather thin : achenes minutely pubescent. 



In moist soil, Newfoundland to British Columbia, Florida, Texas and Oregon. Summer and fall. 



65. Solidago Shdrtii T. & G. Stems 5-13 dm. tall, striate or striate-ridged, finely 

 onbescent : leaves rather numerous ; blades thickish, prominently 3-ribbed, those of the 



