CARDUACEAE 1367 
Robust plant, when fully developed: leaf-blades 
chiefly sessile. 
eri bases broad: leaf-axils Lu foliose. 28. A. corrigiatus. 
Leaf-bases narrow : leaves very rough. 29. A. triangularis. 
Blades of. m dominant leaves not cdanb api 
Blades of the dominant leaves ovate-elliptic to 
lanea area ate. 
Leaf-blades firm, crisp: stem bearing stalked 
E | inflorescence aes narrow, 
vate in outlin 30. A. claviger. 
Lent: WEM thinnish : Dlani without glands: 
inflorescence somewhat thyrsoid. 31. A. gracilescens. 
Blades of e dominant leaves linear-elliptic 
ht sides. 
Leaf-blades soft, thinnish, many with long 
stra 2D Feed petioles: inflorescence usually 
race 32. A. linguiformis. 
Leaf-blades very rough, thick, usually ses- 
sile: me decompou nd. 
Plant not Penau ular: leaves preme -shaped 
or thong-li 33. A. loriformis. 
ud somewhat glandular: leaves grass- 
lik 34. A. Mohrii. 
V. PUNICEI 
Leaf-blades entire. 35. A. puniceus. 
Leaf-blades sharpiy serrate (except the basal and lower 
cauline of No. 36). 
RRO Ree irregularly, congested or corymbed : pubes- 
ofte 
UD dunes little Cn sping: bracts of the AREE 
with linear-elliptic or emn sabalatë ti 36. A. Elliottii. 
Upper leaves sheathing the axils: bracts of the in- s 
voluere with deltoid tips. 37. A. conduplicatus. 
mo bro adiy panicled, diffuse, leafy: heads 
at mote. 
Leaves contracted into a broad petiolar portion : hair . 
present in lines on the upper stem. 38. A. prenanthoides. 
Leaves n nearly straight sides, little constricted 
Tubercular- based hair seattered A the stem. 35. A. puniceus. 
No tubercular-based hair on the = 68. A. novi-belgii. 
VI. CAROLINIANI 
A woody vine with trailing or climbing stems and branches, l 
flowering the year round. 39. A. carolinianus. 
VII. LAEVES 
Involucre campanulate, 
Leaves glabrous except the edges. 
Inv olueral ds ecu. linear with broad rhomboid 
ips. 
Cauline leaf- blades elliptic, ep or ovate: 
inflorescence tending to the racem e panicle, 40. A. laevis. 
Cauline leaf-blades linear to cloncatlanceoln de 
inflo Oresconce tending to the corymbose panicle, 41. A. concinnus. 
Involueral rece linear, their green tips narrowly 
Cauline leaves linear or narrowly a RAM 42. A. purpuratus. 
Cauline leaves very narrowly linear: heads 
mall. 43. A. attenuatus. 
Leaves glabrous above, often with minute hair beneath. 
Leaf-blades entire, short, elliptic, remote. 44. A. ursinus. 
eaf-blades often coarsely toothed, prolonged, linear 
In 45. A. falcidens. 
Involucre turbinate: leaf-blades scarcely clasping. 46. A. turbinellus. 
VIII. PATENTES 
Stem low: leaves rough: inflorescence bro 
Tüvolucre turbinate-campanulate or turbin 
Heads 3—4 cm. broad, few and sca ttered : ueoiical 
bracts pubescent, thi 
Leaf-blades thinnish: heads 6-8 m high. 4T. A. continuus. 
Leaf-blades very "s ck : heads 10-12 à mm. high. 48. A. georgianus. 
Heads about 2 em. oad, numerous, crowded : in- 
volueral bracts merely ciliate, thin 49. A. fontinalis. 
