Lepachys. COMPOSITiE. 315 



scure lacerate fringe : brandies of the style Jlattish, terminated by a very 

 short truncate or obscurely conical barbellate appendage. — Ratibida, Raf., 

 Don. (Obeliscaria § Ratibida & Monodonta, DC.) 



2. L. columnaris: strigose-scabrous, mostly branched from the base; radi- 

 cal (primordial) leaves undivided, spatulate-lanceolate ; the cauline pinnately 

 parted, the upper sessile; seoments linear-lanceolate or oblong, rigid, mucro- 

 nulate, entire, rarely somewhat lobed ; disk columnar, in fruit longer than 

 the 5-8 oblong or obovate-oval recurved yellow rays. — Rudbeckia colum- 

 naris, Parsh! fl. 2. p. bib; Bot. mag. t. 1601; Nutt. ! gen. 2. p. 178; 

 Hook. ! fl. Bor.-Am. 1. p. 311. R. columnifera, Nutt. in Fras. cat. Rati- 

 bida sulcata, Raf. in jour. phys. I. c. R. columnaris, Don, in Brit.fl. gard. 

 ser. 2. no. 361. Obeliscaria columnaris, DC! prodr. b. p. 559. 



/3. pulcJierrima (Don): rays wholly or in part brown-red. — Varies, like 

 var. a. with the segments somewhat oblong or narrowly linear-lanceolate, 

 either entire {Don, in Brit. fl. gard. I. c. t. 361) ; or the narrowly linear di- 

 visions of the leaves again irregularly pinnatifid, the rays also yellow at the 

 apex (Obeliscaria pulcherrima, DC! I. c.) ; or the rays entirely brown-red, 

 with the columnar disk variable in length (Rudbeckia Tageles, /ames.' in 

 Long^s exped. 2. p. 68. Obeliscaria Tagetes, DC. I. c), occasionally sub- 

 globose, the peduncles shorter. R. globosa, Nutt.! in jour. acad. Philad. 7. 

 p. 19. R. columnaris, Torr. ! in ami. lye. NewYork, 2. p. 215. 



Plains of the Upper Missouri, Bradbury! Nuttall! also between the Mis- 

 souri and Mississippi, and on St. Peter's River, Mr. Nicollet ! to Saskatch- 

 awan, Drummond ! extending to the Rocky Mountains, Douglas! 0. With 

 the preceding, Nuttall, Mr. Nicollet! Upper Arkansas, Dr. James! to 

 Texas, Drummond! and Berlandier ! July-Aug. — Plant 10 inches to 2 

 feet high. Leaves crowded or somewhat distant ; the segments variable : the 

 rays an inch long, and sometimes nearly as broad. Chaff with woolly tips 

 and mostly ciliate on the margins, near which is an oblong purple spot. 

 Wing of the achenia (anterior) terminated by a short acute membranaceous 

 tooth", which is sometimes obsolete ; the exterior margin obscurely if at all 

 winged, but sometimes very slightly toothed at the summit. — The specimens 

 collected in Mr. Nicollet's expeduion entirely justify the union of the varie- 

 ties with red-brown or particolored rays to the yellow R. columnaris. Both 

 forms vary with the disk an inch or more in length, and in starved specimens 

 reduced to half, or even one-third of an inch, when it is nearly globose. The 

 specimens of Dr. .Tames belong to a dwarf, much branched and leafy plant, 

 with short peduncles. 



§ 3. Achenia much compiressed, 2-winged and conspicuously 2-tooihed or 

 2-awned {the summit and the teeth obscurely bearded) ; the loings strongly 

 fimbriate- ciliate : branches of the style terminated by a lanceolate acute 

 barbellate-hispid appendage. — Lophoch^na. 



3. L. peduncularis : stem simple or branching near the base, leafy and 

 hirsute below ; leaves hirsute or strigose, bipinnalely parted ; the ultimate 

 segments short, obtuse ; peduncles naked, very long; disk columnar, twice 

 orthrice the length of the rays ; chaff sparsely ciliate, slightly bearded at the 

 summit. 



Texas, Drummond ! — Root fusiform. The leafy portion of the stem 6-8 

 inches; the naked peduncle 12-16 inches in length. Radical leaves une- 

 qually pinnately divided ; the divisions numerous, oblong or cuneiform, in- 

 cised or pinnatifid ; the upper leaves regularly pinnatifid, with narrow seg- 

 ments. Disk an inch and a half or more in length, cylindrical. Exterior 



