half inches broad, elongate-spathulate from a broad winged 
petiole, rounded at the apex, margin obscurely undulated, 
midrib very stout; cauline ovate-oblong, obtuse from a cordate 
semiamplexicaul base, remotely and irregularly toothed, 
spreading, bright green, paler beneath. Heads terminating all 
the branches, two and a half inches in diameter ; peduncles stout, 
thickened upwards, bearing short rather squarrose scattered 
linear bracts with cordate bases. Involucre between turbinate 
and hemispherical; bracts very numerous, in many series, 
linear, acute, rigidly herbaceous, green, strongly recurved 
from about the middle, giving the involucre a squarrose appear- 
ance, innermost erect, all scabrid, the tips glandular. Receptacle 
flat, pitted. Ray-flower in about two series, bright violet- blue ; 
ligules an inch long, minutely toothed at the tip ;_ style-arms 
slender with rounded tips. Disk-flowers golden yellow, 
puberulous ; corolla lobes short ; style-arms with obovate broad 
appendages. Pappus of few marginal bristles. _Achenes (un- 
ripe) glabrous, smooth.—/. D. H. 
Fig. 1, Vertical section of involucre and receptacle ; 2, inner bract of involucre ; 3, 
ray-flower; 4, its style-arms; 5, disk-flower; 6 and 7,itsarms; 8, disk-flower, 
with inner bract of involucre connate to the achene; 9, hair of pappus :—all 
enlarged. 
