IIOMPOSITAE (composite FAMILY) 



867 



etc.; leaves broadly ohlanceolate or even obovate, iinlobed, pale beneath, acumi- 

 nate, sagittate at base, some or all rather finely sinuate-toothed^ the upper 

 usually entire or nearly so. — Rich thickets, etc., e. Mass. to Ind. 



5. L. sagittifblia Ell. 'I'all and stout, glabrous, very leafy ; leaves thickish, 

 broadly oblimg or lance-obhmg, acute, strictly entire or merely a little toothed 

 on ilie broad and conspicuous amplexicaul auricles of the sagittate base ; iiitio- 

 rescence, etc., as in nos. 3 and -1. (L. integrifolia Man, ed. 6, in part.) — Rich 

 soil, Pa. to S. C. 



-^ -»- Leaves hirsute or hispid-setose on the midnerve beneath. 



•>-<■ Stem leafy chiefly at or below the middle ; bracts of the inflorescence minute^ 

 subulate ; slender eastern and. southern species. 



6. L. hirsuta Muhl. Rather few-leaved, 0.5-1 m. high, 

 commonly hirsute at base ; leaves hirsute on both sides or only 

 on the midrib, mostly runcinate-pinnatifid, with rather narrow 

 rhachis and lobes ; heads slender and elongated, in a loose 

 open panicle ; achenes elliptic-oblong, equaled by the beak ; 

 flowers yellow-purple, rarely whitish. — Dry 

 open ground. Que. to La, and Tex. Fig, 

 1020. 



+* •*-»• Stem more uniformly leafy; bracts at 



the base of the inflorescence somewhat 



^foliaceous ; stout species of the interior. 



1020. L, hirsuta. 



7. L. ludoviciana (Xutt.) Riddell. Tall and stout, 0,5- 

 1.5 m, high, leafy ; leaves sinuate-pinnatifid, the rhachis and 

 spinulose-toothed lobes rather broad ; heads large, ovoid, in io2i. L. ludoviciana. 

 an open panicle: the involucre much imbricated, 1.5-2 cm. 



long; flowers yelloic. — Minn,, la., and south westw. Fig, 1021, 



8. L, campestris Greene, Closely similar to no, 7, but flowers blue. — Prai- 

 ries, s. Minn, to Kan. — Perhaps only a color form of the preceding. 



*** Heads about '[S-flowered; achenes lanceolate, S-ribbed on each face, nar- 

 row-margined., 3-4 times exceeding the beak. 



9. L. M6rssii Robinson. Very leafy, somewhat hirsute below. 1-3 m. high ; 

 leaves runcinate-pinnatifid, mostly S-lolDed, 1.2-2 dm. long, half as broad, on 



broadly winged clasping petioles, the lower somewhat hirsute 

 beneath on the midrib, etc. ; panicle ample ; involucre about 1 cm. 

 long ; flowers blue ; achene black, mottled with brown ; pappus 

 cream-colored in drying. — Rich low ground, Me. and Mass.; also 

 reported from n. X. Y, Fig, 1022. 



102J. 



the 



.,..V> 



\V 



§2. LACTUCASTRUM Gray. Achenes flat, lanceolate-oblong, 

 marginless., tapering to a short slender firm beak; perennial ; 

 L. M.,rssii. flowers blue. 



10, L. Steele! Britton. Tall and stout ; leaves ovate-oblong to 

 broadly lanceolate, doubly dentate but unlobed. acuminate, hirsntf upon 

 midnerve and principal veins beneath, narrowed at the base to 

 rather long and winf^ed petioles ; heads in an open panicle ; 

 flowers bluish-purple ; achenes lanceolate, 3-ribbed on each 

 surface, the margin .<liirlitly thickened. — Open w^oodland, near 

 ^Ya.shin£:ton, D. C. (Stpple). 



11. L. pulchella (Pursh) DC. (Bmk L.) Pale or glau- 

 cous ; stem simple, 1 m. or less high ; leaves sessile, glahrous, 

 oblong- or liuear-lanrr<flate, entire, or the lower runcinate- 

 pinnatifid; heads few and large, racemose, erect on scaly- 

 bracted peduncles ; involucral bracts imbricated in 3—4 ranks. 

 — Upper Midi, and Out., westw. and southw. Fig. 1023. 



1* 



1028. L. i.uk-bella 



