Part 3, 1916] CARDUACEAE: TAGETEAE 
Pappus of well-developed squamellae. 
Squamellae few, 2-6. 
Heads sessile or nearly so; involucral bracts 3-5; squamellae all 
lanceolate or subulate and awn-tipped. 
Leaves obovate or elliptic to linear, with scattered glands beneath. 
Involucral bracts equally round-keeled to near the apex; 
plants mostly prostrate. 
Bracts 5; heads 9—12-flowered. 
Leaves hispid-ciliate at the base. 
Involucral bracts hispidulous on the back. 
Involucral bracts glabrous. 
Leaves hispid-ciliate to the tip. 
Bracts 3; heads 7—9-flowered. 
Leaves linear, about 2 cm. long; heads short-peduncled. 
Leaves oblong or oblong-oblanceolate, about 1 cm. 
long; heads sessile. 
Involucral bracts strongly keeled only at the base. 
Plants prostrate or procumbent. 
Pappus with an outer row of minute bristles. 
Pappus simple, uniform. 
Leaves oblanceolate or obovate; heads 15-30- 
flowered. 
Leaves linear or oblong; heads 10—17-flowered. 
Leaves lax; glands conspicuous. 
Leaves crowded; glands not conspicuous. 
Plants erect or ascending. 
Heads solitary in the axils. 
Heads clustered towards the ends of the branches. 
Stem simple or with erect branches; heads many 
in each cluster. 
Stem 2.5-3.5 em. high; heads 19—20-flowered. 
Stem 15-45 em. high; heads 12—14-flowered. 
Stem with spreading branches; heads few in each 
cluster. 
Leaves narrowly linear, with two rows of glands beneath, one 
near each margin. 
Plants branched at the base; heads sessile. 
Plants simple below, branched above; heads usually short- 
peduncled. 
Heads distinctly peduncled. 
Squamellae, at least some of them, not awned. 
Squamellae very short, all muticous, or one or two produced 
into an awn; bracts 6-8; ligules inconspicuous. 
Squamellae lanceolate, acuminate, half as long as the corollas; 
bracts 5; ligules conspicuous. 
Squamellae lanceolate or subulate, all awn-tipped. 
Bracts 5. 
Peduncles shorter than the leaves. 
Peduncles longer than the leaves. 
Heads turbinate, 5-6.5 mm. long, 2—2.5 mm. broad, 
11—18-flowered; bracts acute or acuminate. 
Heads cylindraceous, 7-8 mm. long, 1.2-1.8 mm. 
broad, 8-12-flowered; bracts obtuse or rounded at 
the apex. 
Bracts 6-10. 
Leaves linear-lanceolate; heads about 20-flowered. 
Leaves lanceolate or oblanceolate; heads 30-50-flowered. 
Leaves glabrous; bracts linear. 
Leaves oblanceolate or oblong, mucronate; in- 
volucre 4-5 mm. high. 
Leaves lanceolate, long-attenuate; involucre 5-6 
mm. high. 
Leaves hirtellous-pubescent; bracts oblong. 
Squamellae 8-38. 
Involucre 3-6 mm. high; plants not fleshy. 
Plants diffuse; involucre 3-5 mm. high. 
Leaves with scattered glands on the lower side; stem pubes- 
cent at least along 2 lines. 
Peduncles 1-3 cm. long. 
Peduncles mostly less than 1 cm. long. 
Leaves with a single row of glands along each margin; stem 
glabrous. 
Plants erect; involucre 5-6 mm. high. 
Involucre 7-10 mm. high; plants fleshy, diffuse; heads 20-90- 
flowered. 
Bracts keeled only at the base; leaves obtuse or rounded at the 
apex. 
Bracts keeled throughout; leaves acute. 
28. 
29. 
aoe oN 
yoy hhh 
yy 
nu 
rhs toh 
195 
. urceolata. 
. prostrata. 
. multisetosa. 
. cylindrica. 
. tenuicaulis. 
. Schaffneri. 
. humifusa. 
. portoricensis. 
. mulliceps. 
. martinicensis. 
. brevicaulis. 
carthusianorum. 
. ciliaris. 
. linearifolia. 
. domingensis. 
. Swartziana. 
. propetes. 
. domingensis. 
. febrifuga. 
. leptocephala. 
. Bonplandiana. 
. sinaloensis. 
. salina. 
. lancifolia. 
. depressa. 
. cubensis. 
. caymanensis. 
erecta. 
. arenaria, 
. grandiflora. 
