RuDBECKiA. COMPOSITiE. 313 



differ from Rudbeckia allsmcefolia ; and R. laciniata has a similar, although 

 less elongated receptacle. 



14. R. nitida (Nutt.) : very smooth and somewhat shining; stem simple 

 or sparingly branched above; leaves coriaceous, oval-oblong and lanceolate, 

 nervose and reticulated, repand-denticulate or entire, mostly acute at each 

 end; the radical and lower cauliue tapering into slender usually margined 

 petioles, the uppermost (often linear-lanceolate) partly clasping; rays large, 

 drooping; chaff" pubescent at the summit. — Nuit.! in jour. acad. PJiilad. 7. 

 p. 78. (1834.) R. glabra, DC. jjrodr. 5. p. 556 ? 



Georgia and Florida, on the borders of swampy open thickets, iVi/^/aM.' 

 Prairies, Louisiana, Dr. Leavenworth! Dr. Carpenter! Dr. Hale ! Texas, 

 Drummond! June-July. — Plant 3-5 feet high, much resembling the pre- 

 ceding, but with more nervose smaller leaves (the lower 4-6 inches long, 1-3 

 wide), beautifully reticulated between the nerves or ribs, &c. Stem either 

 simple, with a solitary head on a long naked peduncle, or branched above, 

 producing several heads. Heads nearly as large as in the preceding, M^ith 

 8-12 rays ; tlje disk sometimes broadly conical and apparently unchanged in 

 fruit ; but commonly elongated like the preceding, and sometimes attaining 

 the length of 2 inches. — Both these species would be very showy in 

 cultivation. 



§ 3. Involucre and chaff as in Macrocline : rays none! (always?) : corolla of 

 the conical-oblong disk nearly destitute of proper tube {the stamens inserted 

 into the very base) : branches of the style slightly dilated upwards, truncate- 

 capitate : achenia jmsinatic : 2^(i2W^^ coroniform and somewhat toothed, 

 nearly as in R. laciniata. — Acosmia, Nutt. 



15. R. occidentalis (Nutt.): smooth and glabrous; stem stout; leaves 

 ovate-lanceolate, acuminate, entire or repandly toothed, sometimes irregu- 

 larly lobed, scabrous on the margin, 3-nerved ; the uppermost sessile, lanceo- 

 late, entire; heads few, on long peduncles ; disk conical ; scales of the invo- 

 lucre lanceolate, acuminate, nearly in a single series. Nutt.! in trans. Amer. 

 phil. soc. {n. ser.) 7. p. 355. 



Rocky Mountains, and woods of Oregon, particularly in the Blue Moun- 

 tain range, by small streams, Nuttall! — Plant about 3 feet high. Leaves 

 ample, somewhat reticulated as in the preceding. Disk purplish-brown, 

 probably elongated in fruit. — Apparently the only species west of the Rocky 

 Mountains. 



R. asperrima, Hornem. (Loud. hort. Biit.) 



R. cicutiB folia, Spreng. is founded on Heliopthalmum cicutEefoliuni, Raf.fi. L/iidov. 



92. LEPACHYS. Raf in jour. phys. 1819, p. 100; Less. syn. p. 225. 



Lepachys & Ratibida, Raf. I. c— Obeliscaria, Cass. (1825), DC. 



Heads many-flowered ; the ray-flowers few, in a single series, neutral ; 

 those of the disk small, tubular, perfect. Scales of the involucre few, linear 

 or subulate, spreading, or sometijnes with an inner series of small obtuse 

 scales similar to the chaff" of the receptacle. Receptacle elongated, colum- 

 nar or spiciform; the chaff" truncate or obtuse, thickened and bearded or vil- 

 lous at the summit, nearly the length of the disk-flowers and partly enclosing 

 or embracing the achenia. Corolla of the disk short, cylindrical, with 5 short 

 VOL. II. — 40 



