Gents 31.] 



THISTLE FAMILY. 



365 



Aster sagittifolius dissitiflorus Burgess. 

 Differs from the typical form of the species in its broader looser pyramidal inflorescence, the 

 somewhat larger and longer peduncled heads, the leaves less serrate, often none cordate. New 

 York to Florida, Mississippi and Oklahoma. 



Aster sagittifoUus urophyllus (Lindl. ) Burgess. 

 As/eriirofi/o'llus l.indh; UC ProdT. $■ 2X^. 1S36. 



Leaves pilose beneath during growth, persistently so on the veins, rough above, lanceolate, acu- 

 minate, the lower, or all of them^ cordate; stem often 5° tall, the narrow inflorescence sometimes 3° 

 long; heads about 3" high; rays white. Grassy thickets and river-banks. New York to Minnesota. 



23. Aster undulatus L. Wavy-leaf Aster. (Fig. 3757-) 



Asler nndulatus L. Sp. PI. S75. 1753. 



Stem stiflf, very rough and pubescent, 

 divaricately branched above, i°-3>2° high. 

 Leaves usually thick, rough on both sides, 

 pubescent beneath, dentate, undulate or en- 

 tire, acute or acuminate, the lowest and basal 

 ones ovate, cordate, 1'-^' long, with naked 

 or margined petioles; middle ones ovate, 

 lanceolate or oblong, with margined petioles 

 dilated and clasping at the base, the upper 

 sessile or clasping, those of the branches 

 small and subulate; heads numerous, race- 

 mose and often secund on the spreading 

 branches, about 4" high, S"-io" broad; in- 

 volucre broadly turbinate, its bracts linear- 

 oblong, pubescent, acute or acutish, their 

 green tips appressed; rays 8-15, pale blue to 

 violet, '^"S" long; pappus whitish. 



In dry soil, New Brunswick and Ontario, south 

 to Florida, Alabama and Arkansas. Called also 

 Small Fleabane and Various-leaved Aster. 

 Sept.-Oct. 



Aster undulatus abruptifoUus Burgess. 



Tall s'-s" high; leaves rougher, chiefly short-ovate, sessile, entire and about 2' long, i yi' broad; 

 inflorescence pyramidal; heads much darker, more crowded. New England to Virginia. 



Aster undulatus loriformis Burgess. • 



Predominant leaves greatly elongated, linear-oblong to linear-lanceolate, often 6' long, with the 

 clasping base narrowed or broadened, only a few of the lower ones contracted into winged petioles; 

 plant little pubescent at maturitj-. Eastern Massachusetts to Virginia and Pennsylvania. 



Aster undulatus torquatus Burgess. 



Leafy, 8'-i4' high, dark green, short-downy; leaves small, very short and broad, close together, 

 entire, their bases clasping the stem as a succession of collars often M' in diameter; lowest leaves 

 petioled; inflorescence much branched, paniculate. Martha's Vineyard, Mass., to Long Island. 



Aster undulatus triangularis Burgess. 



Tall, leafy, 3°-7° high, pale; pubescence slight; leaves hispid above, ovate-triangular, acumi- 

 nate, chiefly 2'-3' long, ;i' broad and sessile. New Y'ork to South Carolina. 



24. Aster patens Ait. L,ate Purple Aster. (Fig. 3758.) 



Aster patens Ait. Hort. Kew. 3: 201. 1789. 



Stem slender, rough, i°-3° high, diver- 

 gently branched. Leaves ovate-oblong to 

 oblong-lanceolate, rough or pubescent, 

 thick and somewhat rigid, strongly cor- 

 date or auriculate-clasping at the broad 

 base, entire, acute, or the lowest obtuse, 

 l'-3' long, those of the branches much 

 smaller and bractlike, the margins rough- 

 ciliate; heads i' broad or more, solitary at 

 the ends of the branches; involucre broadly 

 turbinate, its bracts linear-oblong, finely 

 pubescent or scabrous and somewhat glan- 

 dular, imbricated in several series, their 

 green acute tips spreading; rays 20-30, 

 purplish-blue, or deep violet, 4"-6" long; 

 pappus tawny; achenes pubescent. 



In diy, open places, Massachusetts to north- 

 ern New York and Minnesota, south to Florida, 

 Louisiana and Texas. Reported from Canada. 

 Known also as Purple Daisy. Aug.-Oct. 





