654 COMPOSITAE 
b. Lower Leaves Heart-shaped with Notched or Entire Margins, the Leaf-stalks, at 
least some of them, Clasping the Stem 
All the leaves clasping the stem. Margins of the leaves entire 
(Nos. 22 and 23 sometimes notched.) 
Leaves broadly egg-shaped. 
With margined leaf-sfalks . . « « « «© « -« « «© « « As Smgulatus 
Without leaf-stalks Sct o fab ightuled « « « « Aa .potens 
Leaves lance-shaped, linear or narrow spatulashaped. 
Plant smooth, not downy or hairy. 
Heads usually about 2 in. broad . . . . . «. . A. phlogifolius 
Heads 1 in. broad or less. 
Leaves almost or quite linear. 
Lower leaves spatula-fformed . . . . . A. concinnus 
Lower leaves linear . . . «= « + » « Ans §uncess 
Plant somewhat downy. 
Leaves linear-lance-shaped . . . . . .- . . . A. Jbongifolius 
Leaves rather broad lance-shaped . . . . . «. « « «© A, Jaevis 
Plant not smooth, decidedly hairy or downy. 
Heads 1 to 2 in. broad, violet-purple . . . . . A. Novae-Angliae 
Heads 1 in. broad or less, blue-purple . . . . .«. A. amethystinus 
Leaves Clasping the Stem. Margins Conspicuously Toothed 
Leaves clasping by a very broad base. . . - . - - . - A. prenanthoides 
Leaves clasping by a narrow base. 
Plant very hairy. 
Teavesiilance-shaped +. «0 © sis © 05 oe «Abe epueee 
TeavesmereshapeGs-s lst clots 6 ells “s) sipeee |<. /s\) peed cmmerreamee 
Plant-smooth or neatly so. .« «© 5 « «© «© «© « » « « A. tordiorus 
c. Leaves not Clasping the Stem, not Heart-shaped at Base and with Entire Mar- 
gins, or with very Remote Teeth 
Plants not Fleshy 
Leaves broad egg-shaped, rather blunt; flowers in a long narrow cluster A. concolor 
Leaves lance-shaped or linear. 
Flower heads in a spreading, almost flat cluster . . . . A. ptarmicoides 
Flower heads in a pyramidal cluster os. var, bs Sa false he tage MTree 
Flower heads in an irregular spreading cluster . . . . «. A. polyphyllus 
Plants Fleshy 
Heads 3 in. to 1 in, broad «~~ 6 + 6 1 © + + 6 + + 6 AL tenuifolius 
Heads less than 4 im. broad . - « = © «© © 5 « © « « « A Subuiates 
d. Leaves not Clasping the Stem, not Heart-shaped; though in Nos, 37 and 38 there 
is slight clasping. Leaf Margins Toothed or Entire 
Flowers violet. 
Lower leaves spatula-formed . . . . - «© +» « « « « A. spectabshs 
Tower leaves epe-shaped » 3s ©) 2 le Se 1) ere 
Lower leaves oval. 
Upper leaves) dinear) oa). | hs, Espen) sro A. gracilis 
Upper leaves oblong to broad lance-shaped . . . . . A. Radula 
Lower leaves lance-shaped. 
Plant somewhat hairy a oe eee 
Plant smooth or with few hairs. 
Flower clusters very leafy . . ... . A. salicifolius 
Flower clusters with few small leaves . . . . A. novi-belgii 
A. nemoralis 
Flowers white. 
Lower leaves oval AP ern MO bd ay kee Te | 
Lower leaves spatulashaped . . . . « =» « « « « =» A, (emcomes 
Lower leaves lance-shaped. 
Stent quitechaity i. 6. be fe ee we Pe net) eel ee ee 
Stem smooth or nearly so, 
Flower cluster with few small leaves . . . . A. Pringles 
Flower cluster leafy. 
Leaves of the cluster short, bract-like . A. Tradescanti 
Leaves of the cluster long . .«. . . .«. A. paniculatus 
