122 COMPOSITE. Aster. 



stem ; scales of the involucre subulate-linear ; achenia minutely pubescent. 

 —Lindl. .' in Hook, compan. to hot. mag. 1. p. 97, ^- in DC. prodr. b. p. 234. 

 St. Louis, Missouri, and also Texas, Drummond ! Western Louisiana, 

 Dr. Leavenworth ! Dr. Hale I — Plant intermediate in its characters between 

 A. undulatus, cordifolius, and sagittifolius, resembhng some states of the 

 former in its pubescence, the second somewhat in its petioled and mostly- 

 cordate cauline leaves, and the latter in inflorescence ; but apparently clis- 

 tinct from either. Stem strict and rather stout, apparently 1 to 3 feet high, 

 when old less canescent and more scabrous. Leaves serrate with appressed 

 teeth, appearing somewhat crenate, velvety beneath ; the lower ones 2 to 4 

 inches long, on narrowly margined petioles 1-3 inches in length. Heads as 

 large as in the preceding, often neariy sessile and glomerate or crowded on 

 the branchlets. Involucre pubescent. Rays blue ; the disk turning purple. 

 — We here introduce the two following species (known to us only by the 

 very brief characters given in DeCandolle), on account of their apparently 

 close resemblance to this and the preceding species. 



34. A. uropihyllus (Lindl.) : stem racemose-panicled, the branches thyr- 

 eoid; leaves ovate-lanceolate, very much acuminate, sharply crenate-serrale, 

 very scabrous above, the lower surface hairy ; scales of the imbricated in- 

 volucre subulate. Lindl. in DC prodr. 5. p. 233. 



Louisiana.— Species near A. hirtellns. Rays white, longer than the in- 

 volucre ; the disk purple. Lindl.— Is it not A. sagittifolius, without the ra- 

 dical leaves ? No information is given respecting the source from which the 

 specimens of this and the following were derived. 



35. A. hirtellus (Lindl.) : stem racemose-panicled, the racemose branches 

 crowded and few-leaved; leaves cordate-ovate, crenate-serrate in the rniddle, 

 very scabrous above, the lower surface hairy ; involucre loosely imbricated. 

 Lindl. in DC. prodr. 5. j^- 233. 



Louisiana.— Rays jjerhaps lilac-color; the disk purple. Lindl. — We 

 have from Western Louisiana (collected by Dr. Leavenworth) very im- 

 perfect specimens, which may perhaps be referred to this species, if indeed 

 they are not rather a more glabrous and attenuated state of A. Drummondii, 

 with loose and virgate racemes: the tall and slender stem is nearly glabrous; 

 the branches scabrous-pubescent ; the cauline leaves ovate-lanceolate, serrate 

 in the middle, more or less cordate, on distinct margined petioles, strigose- 

 scabrous above, pubescent beneath. 



36. A. Lindleyanus : stem stout, glabrous, or pubescent in lines, corym- 

 bose-paniculate above ; leaves (thickish) mostly smooth and glabrous, ovate, 

 sharply and unequally serrate; the radical and lowest cauline usually some- 

 what cordate, on broadly margined petioles ; the uppermost oblong-lanceo- 

 late, narrowed at the base, sessile ; heads loosely- paniculate or somewhat 

 corymbose; scales of the involucre linear-lanceolate, acute, somewhat un- 

 equal, rather loosely imbricated ; achenia at length almost glabrous. — A. 

 paniculatus 6. ? (& a. chiefly) Hool: ! fl. Bor.-Am. 2. p. 8. 



(i. stem and lower surface of the leaves (especially the midrib and petiole) 

 pubescent with loose somewhat deciduous hairs. 



y. more slender; leaves membranaceous ; the radical and lower cauline 

 narrowed into a winged (ciliate) petiole.— A. prsecox, Lindl. ! in Hook. Ji. 

 Bor.-Am. 2. p. 9, not of Willd. 



Saskatchawan, Z)rwm?7ior!fZ/ and on the Red or Assimboin River, X>o?/^- 

 las! to Slave Lake, Richardson! i3. Rocky Mountains (probably about 

 lat. 52°), Drummond ! y. Fort Franklin on the Mackenzie River, Richard- 



son ! Plant 2h to 4 feet high, when growing in low fertile soils on the 



Assiniboin River, according to Douglas (in herb. Hook.) ; the Arctic speci- 

 mens 12 to 18 inches high. Leaves thickish or somewhat fleshy, 1-3 

 inches long, mostly acute or acuminate, serrate with small and irregular 



