54 NORTH AMERICAN FLORA 
Involucral scales densely villous through- 
out, the inner ones frequently with a 
broad, pale, scarious margin; involucral 
glands none or concealed. 
Involucral scales thinly villous above, dis- 
tinctly resinous-glandular, the scarious 
margin narrow or none. 
Leaf-blades revolute to the midvein, con- 
cealing the hairs, impressed-punctate 
above; heads 11-flowered. 
Cymes short and compact, few-headed, divaricately 
spreading from the upper axils; heads about 18- 
21-flowered. 
Leaves lanceolate or ovate-lanceolate, acuminate. 
Pappus-bristles pale-tawny, 4-5 mm. long. 
Pappus-bristles white, 6.5—7 mm. long. 
Leaves ovate-lanceolate to elliptic, subacute to ob- 
tuse or retuse. 
Cymes undifferentiated, the heads solitary or paired in 
the axils of the upper foliage leaves; corolla-lobes 
pubescent externally. 
Leaf-blades tomentose beneath. 
Leaf-blades not papillose-pubescent 
much contracted and few-headed. 
Leaf-blades broadest much above the middle, gradu- 
ally attenuate to the base. 
Leaf-blades spatulate. 
Leaf-blades obcordate. 
Leaf-blades broadest at or near the middle, not 
conspicuously attenuate to the base. 
Leaf-blades 10-20 mm. long, entire, flat, acute 
or mucronate. 
Leaf-blades rotund or nearly so, 5-15 mm. long 
and wide, undulate, sometimes complicate. 
Leaf-blades papillose-pubescent above; inflorescence 
of elongate or contracted cymes. 
Leaf-blades thin, flat, not prominently veined; 
bracteal leaves distinctly smaller than the 
cauline. 
Leaf-blades broadly elliptic. 
Leaf-blades narrowly oblong. 
Leaf-blades thick, reticulately veined, more or less 
rugose or bullate above; bracteal leaves nearly 
or quite equaling the cauline, or gradually re- 
duced above. 
Cymes very flexuous; leaf-blades 10-20 mm. 
long. 
Cymes straight or nearly so. 
Leaf-blades oval to elliptic-oblong, obtuse or 
narrowed at the base, rugose and finely 
papillose-pubescent above. 
Leaf-blades less than twice as long as 
wide, very blunt or rounded at the apex. 
Leaf-blades about three times as long as 
wide, narrowed to an obtuse or subacute 
apex. 
Leaf-blades lanceolate or ovate, broadest 
near the truncate or subcordate base, 
strongly rugose and bullate above. 
Inner involucral scales broadest just below 
the middle; leaves acute or barely ob- 
tuse; cymes elongate. 
Inner involucral scales broadest near the 
base; leaves obtuse or rounded; 
cymes short. 
Leaf-blades brown-tomentose beneath; 
inner involucral scales merely acute. 
Leaf-blades gray-tomentose beneath; 
inner involucral scales sharply 
acuminate. 
Leaf-blades ovate-lanceolate, acuminate, flat; 
heads crowded. 
Involucral scales obtuse. 
Leaf-blades tomentose beneath. 
Leaf-blades glabrous to strigose-pubescent beneath. 
Heads 5-—18-flowered; leaves resinous-dotted; pappus- 
bristles conspicuously flattened; Jamaican species. 
above; cymes 
22 VA 
Fase VE 
24. V 
as WZ 
26. V 
ZisaVi 
28. V 
295 Vi 
30. V 
Silo WY, 
32054 
14. V 
1550 
Soe 
34. Vi 
6 WY 
Bey We 
sila WW 
38704 
aie) We 
41. V 
[VOLUME 33 
. stenophylla. 
. angustissima. 
. corallophila. 
. longifolia. 
. Shaferi. 
. albicaulis. 
. gracilis. 
. bahamensis. 
. obcordata. 
. arbuscula. 
. complicata. 
. gnaphaliifolia. 
. angustata. 
. fruticosa, 
. calophylla. 
. vicina. 
leptoclada. 
. calida. 
. semitalis. 
. parvuliceps. 
. desiliens. 
