150 NORTH AMERICAN FLORA 



Pappus of some inner elongate squamellae and some outer 

 very short, obovate ones. 

 Outer squamellae entire. 

 Outer squamellae erose. 

 Ligules short; head eylindric or fusiform. 



Leaflets lanceolate, serrate to pectinately incised. 

 Leaflets merely serrate. 



Disk-corollas viscid-hispid; ligules narrow and ascending. 

 Disk-corollas merely puberulent; ligules broad. 



Heads very numerous, in dense clusters, short-peduncled. 

 Leaflets broadly lanceolate or elliptic. 

 Leaflets narrowly linear-lanceolate. 

 Heads few, long-peduncled, solitary at the ends of the 

 branches. 

 Shorter pappus-squamellae 2 mm. long. 

 Shorter pappus-squamellae about 4 mm. long. 

 Ligules ascending. 

 Ligules spreading. 



Ligules 3, light-yellow. 

 Ligules 5, orange. 

 Leaflets pectinately incised. 

 Leaflets linear-filiform or subulate, entire or with a few similar lobes. 

 Pappus of wholly paleaceous squamellae; leaflets often with a few 



subulate lobes. 

 Pappus of longer bristles and shorter paleaceous squamellae. 

 Leaflets of several pairs; heads short-peduncled or subsessile. 

 Plants low, diffuse; involucre turbinate-clavate, 5-angled 



at the base; heads subsessile or nearly so. 

 Plants taller, 2-3 dm. high; involucre fusiform, not angled 

 at the base; heads distinctly peduncled. 

 Leaflets very few or leaves simple; heads slender-peduncled. 



1. Tagetes florida Sweet, Brit. Fl. Gard. II. pi. 35. 1838. 



An erect perennial; stems solitary or a few from the base, 3-6 dm. high, cymosely branched 

 above, striate or round-angled, glabrous; leaves opposite, simple, sessile, elliptic or oblong, 

 2-7 cm. long, glabrous, with numerous small scattered glands, finely, closely, and sharply 

 serrate, the lower teeth often ciliate-tipped; heads many, cymose, in a flat-topped inflorescence; 

 peduncles 0.5-1 cm. long; involucre subcylindric, 7-8 mm. long, 2.5-3 mm. broad; bracts 

 5-7, linear, sparingly hairy, with numerous small scattered glands, united to near the apex, 

 with subulate tips; ray-flowers 3 or 4; ligules suborbicular-flabelliform, truncate, 5-6 mm. 

 wide; disk-flowers 6-8; corollas 5.5 mm. long, glabrous; tube 2 mm. long, eylindric; throat 

 2 mm. long, narrowly funnelform; lobes lanceolate; achenes clavate, 6 mm. long, glabrous; 

 squamellae 5-7, two of them usually bristle-like, 3 mm. long, the rest scale-like, oblong, un- 

 equal in length, the longest less than half as long as the bristles. 



Type locality: Mexico. 



Distribution: Mexico, from Durango and San Luis Potosi south. 



Illustrations: Sweet, Brit. Fl. Gard. II. pi. 35; Bot. Mag. pi. 740 (as T. lucida). 



2. Tagetes lucida Cav. Ic. 3: 33. 1894. 



A glabrous perennial, with a short thick base; stem 3-8 dm. high, glabrous and striate, 

 cymosely branched above; leaves opposite, simple, linear, 4-10 cm. long, sessile, usually 

 obtuse, sometimes acute at the apex, glabrous with numerous minute scattered glands, finely 

 and densely serrate, the lower teeth often ciliate-tipped; heads in rather dense flat-topped 

 cymes; involucre eylindric, 9-10 mm. long, 2-3 mm. broad; bracts 5-7, united to near the 

 subulate tips, glabrous, with many scattered small glands; ray-flowers mostly 3; ligules flabel- 

 liform, 3 mm. long and wide, truncate; disk-flowers 5-7; corollas nearly 6 mm. long; tube about 

 equaling the trumpet-shaped throat; lobes lanceolate; achenes 6-7 mm. long, striate; squa- 

 mellae 5 or 6, two of them bristle-like, about 5 mm. long and nearly three times as long as 

 the rest, which are scale-like, oblong, obtuse. 



Type locality: "Nova Hispania" [Mexico]. 

 DISTRIBUTION: Nearly throughout Mexico; Guatemala. 

 Illustrations: Cav. Ic. pi. 264; Andr. Bot. Repos. pi. 359 (poor). 



