Helenicm. COMPOSITiE. 385 



of H. autumnale, to which this species has an affinity; the leaves are also 

 generally entire and scarcely decurrenf. Rays slightly pubescent external- 

 ly." Nu/lall. — We have only seen cultivated specimens: in these the ribs 

 of the acheniuni are villous with long scattered hairs. 



3. H. tenutfolium {Nu\t.): fastigiately much branched, nearly glabrous; 

 leaves crowded and usually fascicled, very narrowly linear, entire; scales of 

 the involucre subulate ; rays rather longer than the globose disk : scales of 

 the pa|)pus ovate, entire, crowned with abrupt awns, nearly erpiaUing the 

 corolla. — Nutt..' in jour. acad. Philad. 7. j^- 66; Hook.! compan. to hot. 

 maff. 1. 2>- 98. 



Fields and road-sides, Mississippi! Louisiana! and Arkansas! "A 

 common and troublesome weed, imparting a bitter taste to the milk of cows 

 that feed upon it." Dr. Hale. ' April-Nov. — H Plant 8-20 inches high, 

 very leafy. Disk 3-4 lines in diairieter, yellow. Achenia villous. 



§ 2. Receptacle ohlong or conical: corolla of the disk mostly 4-ioothed. — 

 Tetrodus, Cass. 



4. H. puherulum {T>C .) : minutely cinereous-puberulent ; leaves oblong- 

 lanceolate, entire; the upper acute or acuminate ; the lower obtuse, some- 

 times incised ; heads terminating the simple naked branches ; rays and 

 involucre very short ; disk globose; scales of the pappus ovate, cuspidate- 

 acuminate, somewhat denticulate or lacerate, rather shorter than the achenia. 

 — DC. prodr. 5. p. 667. H. piibescens. Hook. 6^' Am. bat. Bcechei/, j^- 149, 

 8f suppl. p. 355 ; not of Ait. H. Californicum, Link, ind. sem. hort. Berol. 

 1840 ? Cephalophora decurrens. Less, in Linncea, 6. p. 517 ; DC. I. c. 

 p. 663. 



California, Chamisso, Douglas! &c. — (l) ? A larger plant than H. quad- 

 ridentatum, sprinkled with resinous globules ; the disk nearly half an inch 

 in diameter. Corolla of the disk brownish-purple at the tips. Rays yel- 

 low, pubescent. Achenia villous on the ribs ; the pubescence and the pap- 

 pus tawny. 



5. H. quadridentatmn (Labill.) : somewhat glabrous, much branched; 

 radical and lower leaves oblong-pinnatifid ; the upper coarsely 1-2-toothed 

 on each side; the uppermost lanceolate, entire ; involucre and rays shorter 

 than the ovoid-oblong disk ; scales of the very short pappus roundish-oval, 

 obtuse. — Labill. in act. soc. nal. hist. Par. 1. p. 22, t. 4 ; Lam. ill. t. 688 ; 

 Bot. reg. t. 598 ; Pursh, fl.. 2. p. 560 ; DC. ! p)rodr. 5. p. 666. Rudbeckia 

 alata, Jacq. ic. rar. 3. t. 593. 



Moist soil and banks of rivers, Louisiana! Mississippi! and Arkansas! 

 common. June-Aug. — (T) Plant 1-3 feet high; the stems and branches 

 broadly winged. Heads small: the disk yellow. Achenia minutely 

 pubescent. 



6. H. microcephalum (DC.) : glabrous [or minutely puberulent] ; stem 

 erect, very much branched, bearing many heads ; leaves lanceolate, entire, 

 somewhat punctate ; involucre very short ; rays 3-ioothed (yellow) glabrous; 

 pappus very short, obtuse. DC. prodr. 5. p. 667. 



l3. bicolor : rays purplish-brown towards the base,* yellow at the apex ; 

 leaves manifestly punctate. — H. elegans, DC. I. c. ? 



Texas ? between Lando and Bexar, Berlandier. (Heads subrotund, 3 

 lines in diameter, DC.) Texas or Arkansas, Mr. Beyrich ! [Dr. Leaven- 

 worth.) 8. Texas, Drummond ! — Plant 2-4 feet high; the minutely puber- 

 ulent branches bearing numerous corymbose heads; the globose disk 3 lines 

 in diameter. Rays niuch longer than the subulate scales of the involucre, 

 about the length of the disk, glabrous or nearly so; the receptacle depressed- 

 VOL. II. — 49 



