16 



BILTMORE BOTANICAL STUDIES 



which it may be easily separated by the broader leaves of different outline and 

 the larger florets and achenes. From R. chapma?ii, elsewhere proposed, this 

 species differs in the larger, broader and more sharply pointed erose-bordered 

 chaff, larger florets and thinner, more sharply cut leaves. 



The original specimens were collected in 1840, at Columbus, Ohio, by Mr. 

 W. S. Sullivant, and are preserved in the Gray Herbarium of Harvard Uni- 

 versity. Specimens from the same region have been distributed by Mr. W. C. 

 Werner, September 10, 1892, No. 128. 



Rudbeckia umbrosa n. sp. 



A perennial herb, 4<i m -i m tall : stem striate, somewhat pubes- 

 cent, either simple or branched : radical leaves ovate, prominently 

 5-7-nerved, coarsely serrate, rounded, truncate or even cordate at 

 the base, i-2 dm long including the slender, pubescent petioles, 

 3-5 cm wide, pubescent on both surfaces : lower cauline leaves 

 similar to the radical, but with shorter petioles and more acute 

 apices : upper stem leaves much diminished in size, short-petiolate 

 or subsessile, narrower and more entire than the lower: in- 

 volucres foliaceous, imbricated, the bracts oblong or linear-oblong, 

 io-i5 mm long, 2-3 mm wide, thin in texture, pointed, i-oerved, 

 pubescent: rays usually 8-12, i.5-2 cm long, 5~9 mm wide, yellow 

 or orange-yellow, 2-3-toothed at the apex, pubescent on the lower 

 surface : disks i-i.5 cm wide, 8-i2 mm high, dark purple : chaff of 

 the receptacle relatively broad, about 5 mm long, 2~3 mm wide at 

 the broadest part, hairy at the apex : disk flowers purple, the 

 corolla lobes erect : style branches obtuse : achenes displaying 

 prominent coroniform pappus. 



Rudbeckia umbrosa inhabits the woodlands, usually in moist soil, of White, 

 Warren and Coffee counties, east Tennessee, and is likely to be found over a 

 greater area of the Cumberland plateau. The type material, preserved in the 

 Biltmore Herbarium, was collected near Sparta, White county, August 5, 1900. 

 The proposed species is related to R. speciosa Wender, 1 c. , differing from the 

 latter species in the broad and hairy-tipped chaff, size of flower-heads, shorter 

 and fewer rays, and in the outline of the leaves. 



Rudbeckia palustris Eggert in Herb. 



Perennial, 5~7 dm tall : stems angled below, striate pubescent 

 near the summit, usually branched : lower cauline leaves 1- 

 i.5 dm long including the petiole, 2-4 cm broad, ovate-lanceolate, 

 remotely serrate or dentate or nearly entire, 3-5-nerved, reticu- 



