1296 CARDUACEAE 
129. PÉCTIS L. 
Annual or perennial caulescent often heavy-scented herbs, usually glandular-dotted 
and glabrous. Leaves opposite: blades narrow, entire, usually bristly ciliate. Heads 
small, radiate, in cymes.  Involucres narrow, several-flowered : bracts distinct, in 1 series, 
keeled. Receptacle naked. Ray-flowers pistillate, fruit-producing : ligules broad. Disk- 
flowers perfect: corollas sometimes 2-lipped. Anthers entire at the base. Stigmas of 
the disk-flowers obtuse. Achenes narrow, terete or angled. Pappus of several scales, 
awns or bristles, or rarely obsolete. Our species are annuals. : 
Pappus of awn-tipped or subulate-tipped scales, 2-3 in the ray, 4-6 in the disk, 
Heads sessile or nearly so: leaf-blades over 1 mm. wide. 
Ray-flowers 5: achenes of the ray with 2 pappus-scales. 1, P. prostrata. 
Ray-flowers 2-3: achenes of the ray with 3 pappus-scales. 2. P. ciliaris. 
Heads long-peduncled: leaf-blades less than 1 mm. wide. 3. P. Lessingii. 
Pappus of 1-6 upwardly barbed awns, or a mere chaffy crown. 
Pappus of 3-6 slender awns. 4. P.tenella. — 
Pappus a scaly crown, sometimes accompanied by 1 or 2 awns. 5. P. angustifolia. 
1. Pectis prostràta Cav. Foliage nearly glabrous. Stems usually branched at the 
base, the branches procumbent or prostrate, 0.5-2 dm. long: leaf-blades oblanceolate to 
linear-spatulate, 1-2 em. long, entire, sparingly bristly near the base: heads sessile or 
nearly so, more or less clustered : involucres prismatic, 6-7 mm. long; bracts concave and 
keeled : ray-flowers 5: achenes 2-2.5 mm. long: pappus-scales ovate-lanceolate or lanceo- 
late, often unequal, short-awned, 2 in the ray, 4-5 in the disk. 
In waste places, about seaports, Florida. Also from southern Texas to Arizona and Mexico. Also 
jn the West Indies. 
2. Pectis ciliàris L. Foliage minutely pubescent, Melissa-scented. Stems 1-4 dm. 
tall, erect or diffusely branched : leaf-blades linear or nearly so, over 1 mm. wide, acute, 
entire, with few bristles near the base: heads sessile or nearly so, few in clusters: in- 
volucres prismatic, 4-5 mm. high; bracts 4-6, linear or oblong: ray-flowers 2-3 ; ligules 
2-2.5 mm. long: achenes slender, 3 mm. long, pubescent : pappus-scales subulate-lanceo- 
late, slender-tipped, 3 in the ray, 5 in the disk. 
In sand, peninsular Florida. Spring to fall. 
3. Pectis Lessingii Fernald. Foliage nearly glabrous. Stems more or less diffusely 
branched, slender, 1-4 dm. long: leaf-blades narrowly linear, 1-3 em. long, less than 1 
mm. wide, acute, entire, with few bristles below the middle: heads commonly solitary on 
filiform peduncles 1-2.5 cm. long: involucres narrow, 4-5 mm. high; bracts linear or 
nearly so : achenes slender, 3 mm. long: pappus-scales ovate or ovate-lanceolate, often ab- 
ruptly narrowed into slender awns. [P. linifolia Less., not L.] + 
In sand, peninsular Florida. 
4. Pectis tenélla DC. Foliage nearly glabrous. Stems commonly branched at the 
base, the branches erect or spreading, 0.5-2.5 cm. long, fastigiate or cymose near the tips: 
leaf-blades narrowly linear, 1-5 cm. long, acute, with few bristles near the base : heads not 
showy : involucres cylindric, 4 mm. high; bracts linear, finally involute : ray-flowers rela- 
tively conspicuous ; ligules mainly ovate, 2.5-3.5 mm. long: achenes slender, 3 mm. long, 
ribbed : pappus-scales 3-6, slender, about as long as the achene, the crown wanting. 
In sandy soil, Texas and adjacent Mexico. Spring to fall. 
5. Pectis angustifdlia Torr. Foliage nearly glabrous, lemon-scented. Stems erect 
or branched at the base, the branches spreading, 0.5-2 dm. long: leaf-blades narrowly 
linear, 2-4.5 cm. long, entire, with few bristles near the base: heads nearly sessile, in 
clusters : involucres cylindric, 3-3.5 mm. high; bracts about 8, linear or nearly so, 1nvo- 
lute, obtuse: achenes 4 mm. long, slender: pappus a crown of 4-5 usually united scales, 
sometimes accompanied by 2 slender awns. 
On plains and dry hills, Colorado to Texas and Arizona. Spring to fall. 
130. ANTHEMIS L. 
Annual or perennial caulescent, often heavy-scented herbs. Leaves alternate : blades 
pinnatifid or dissected, the segments slender. Heads radiate, long-peduncled. Involucres 
hemispheric, many-flowered : bracts in several series, appressed, scarious-margined. Be: 
ceptacle convex, conic or oblong, chaffy, at least near the top. Ray-flowers pistillate, 
fruit-producing, or neutral: ligules white or yellow. Disk-flowers perfect, fruit-produc- 
ing: corollas yellow. Anthers entire and obtuse at the base.  Stigmas of the disk-flowers 
truncate. Achenes angled, ribbed or striate. Pappus wanting or a mere border. 
