Part 3, 1916) CARDUACEAE: TAGETEAE 
Peduncles less than 1 cm. long; pappus-bristles not 
dilated below. 
Peduncles more than 1 cm. long; pappus-bristles 
dilated at the base. 
Bracts flat at least above; corolla-tube shorter than the 
throat; lobes short; heads distinctly peduncled. 
Pappus of both ray- and disk-flowers at least partly 
bristly. 
Leaves 1-2 mm. wide. 
Plants pubescent; peduncles 3—5 cm. long. 
Stem hirsutulous. 
Stem finely puberulent. 
Plants glabrous; peduncles 1.5—2.5 cm. long. 
Leaves 4-8 mm. wide. 
Pappus of the disk-flowers squamellose or a mere crown. 
Bracts broadly linear, very obtuse; branches ascending. 
Bracts yellowish-green, rounded at the apex, with 
only the apical gland conspicuous. 
Bracts purple, with deltoid obtuse apex and sev- 
eral conspicuous glands. 
Bracts narrowly linear; pappus of 2 or 3 awns, with 
or without a squamellate cup; branches divaricate. 
Involucral bracts 3-5. 
Bracts more or less acuminate. 
Pappus consisting of several awns, slightly dilated at the 
base. 
Heads crowded on short branches. 
Heads not crowded. 
Leaves with only one row of glands close to each 
margin. 
Leaves with scattered glands or the smaller with a 
single row half way between the midrib and 
each margin. 
Peduncles 5-15 mm. long; plent with ascending 
branches. 
~ Peduncles 20-30 mm. long; plant diffusely 
branched. 
Pappus of a squamellate crown with or without awns. 
Awns 1 or 2. 
Awns wanting. 
Bracts obtuse; heads scattered on long peduncles. 
Pappus of the ray-flowers of subulate stout awns. 
Annuals; awns more or less spreading. 
Awns retrorsely barbed. 
Leaves oblanceolate, dentate; teeth ending in bristles; glands 
scattered. 
Leaves narrowly linear, merely setose-ciliate below or with a 
few lobes; glands in marginal rows. 
Pappus of the ray-flowers of 3—6 and of the disk-flowers of 
2-5 awns. 
Pappus of the ray-flowers of 2 or 3 unequal awns, that of 
the disk-flowers a minute squamellae crown. 
Peduncles 2-3 cm. long; bracts 5 mm. long, broadened 
and rounded at the apex; leaves more than 1.5 cm. 
ong. 
Peduncles 1 em. long or less; bracts 3-4 mm. long, 
not broader at the apex, obtuse; leaves less than 
1.5 cm. long. 
Awns smooth, divergent or reflexed. 
Perennials; awns, if present, erect. 
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1. Pectis urceolata (Fernald) Rydberg, sp. nov. 
Pectis prostrata urceolata Fernald, Proc. Am. Acad. 33: 68. 1897. 
197 
. tenella. 
. Pringlei. 
. scabra. 
. biaristata. 
. Pringlet. 
. sinaloensis. 
. Rusbyi. 
. purpurea. 
. Rosei. 
. fasciculi flora. 
Berlandieri. 
. Oerstediana. 
. capillaris. 
. uniaristata. 
. dichotoma. 
. filipes. 
. multiseta. 
. Coulteri. 
. Bennettii. 
. ambigua. 
. linifolia. 
. imberbis. 
A diffuse annual; stem branched at the base, 1-2 dm. high, mostly ascending, hirsute in 
decurrent lines; leaves oblanceolate, entire, 2-3 cm. long, 5-8 mm. wide, obtuse, hirsute on 
the midribs beneath, with 6-12 pairs of bristles below and numerous scattered small glands; _ 
heads in small terminal glomerules, sessile; involucre urceolate, 7-9 mm. high, 3 mm. broad; 
bracts 5, oblong, hispidulous on the back, round-carinate to the apex, with acute spreading 
tips; glands inconspicuous, near the apex; ray-flowers 5; ligules oblong, scarcely 2 mm. long; 
disk-flowers 4-8; corollas 2 mm. long; achenes 4 mm. long, hirsute; squamellae of the disk- 
flowers 5, lanceolate, awn-tipped; those of the ray-flowers 2 and somewhat larger. 
Tyre Locauity: Hacienda San José, Chihuahua. 
Distrmution: Known only from the type locality. 
