COMPOSITOR. 209 



3. N. altissimus Hook. : stem erect, smooth, branched ; leaves all pe- 

 tioled, undivided, or the lower 3 5-cleft or parted ; the lobes or leaves acu- 

 minate, repandly toothed or denticulate ; heads in small axillary or terminal 

 clusters ; involucre 5-leaved, 5 6-flowered. N. cordatus and A 7 , deltoideus 

 D. C. Harpalyce altissima and cardata Don. Prenanthes altissima and 

 cor data Pursh. 



Woods. Can. to Geor. W. to Ken. Aug., Sept. '4 Stem 4 or 5 feet high, 

 slender. Leaves sometimes cordate, deltoid or triangular-hastate. Heads nod- 

 ding, in racemes arranged in a large leafy panicle. Flowers yellowish- white. 

 Pappus dirty white. Tall Nabalus. 



4. N. virgatus D.C.: smooth; stem simple; leaves narrow-lanceolate; 

 the lower sinuate or dentate, upper entire ; racemes simple, terminal ; 

 heads nodding, 8 10-flowered; involucre smooth, 8-leaved. Harpalyce 

 nrgata Don. Prenanthes virgata Mich. 



Sandy fields. N. J. to Flor. Aug., Sept. 1\.. Stem 25 feet high. Heads 

 in a long terminal virgate raceme. Flowers pale purple. Virgate Nabalus. 



5. N. Fraseri D. C. : stem erect, slightly pubescent, branched ; leaves 

 mostly deltoid, 3 7-lobed, contracted into winged or margined petioles; 

 upper nearly sessile and undivided ; involucre smoothish, of about 8 scales, 

 8 12-flowered. N. Fraseri, trilobaius, inlegrifolius and Serpentarius,@.D.C. 

 Prenanthes rubicunda Pursh, (according to Torr. <f* C?r.) 



Dry sterile and sandy soils. Can. and N. Y. to Flor. Aug. Oct. QJ.. Stem 

 2 4 feet high. Leaves very variable. Involucre often purplish, usually quite 

 smooth. Flowers cream-color, sometimes with a tinge of purple. Pappus straw 

 color. Very near N. albus, and some of its forms can only be distinguished from 

 that species by its light-colored pappus. Fraser's Nabalus. 



6. N. nanus D. C. : smooth ; stem simple ; leaves on slender petioles, 

 varying from undivided and angular or toothed to hastately or palmately 

 3-lobed or parted ; heads clustered, forming a racemose panicle ; involucre 

 10 15-flowered ; inner scales about 8 ; the calyculate scales very short, tri- 

 angular-ovate. (Twr. ($ Gr.} Harpalyce alba,\a.r. nana Beck Sot. 1st Ed. 

 Prenanthes alba } va.r. nana Big. 



White. Mountains, N. H. Big. Summit of Mount Marcy, Essex county, N. Y. 

 Torr. Aug. 1\. Stem 5 12 inches high, smooth. Heads nodding. Flmoers 

 whitish. Pappus straw-color. Dwarf Nabalus. 



7. N. Boottii D. C. : stem simple, pubescent at the summit ; leaves pe- 

 tioled, smooth ; lower subcordate or hastate-cordate, obtuse; the middle cor- 

 date-lanceolate ; upper linear-lanceolate, acuminate and entire ; heads in n 

 nearly simple raceme ; involucre 10 18-flowered ; the inner scales 10 15, 

 obtuse ; the calyculate scales linear, lax, nearly half the length of the 

 proper involucre. (Torr. ty Gr.} Prenanthes Zfoz,var. nana Big. (inpart) 



White Mountains. N. H. Boott. Summit of Whiteface Mountain, Essex 

 county, N. Y. Torr. Aug., Sept. %. Stem 5 8 inches high. Leaves variable. 

 Heads slightly nodding. Flowers whitish, odorous. Pappus straw-color. Dis- 

 tinguished from the preceding by the narrow loose and elongated calyculata 

 scales of the involucre. Torr. Bootl's Nabalus. 



