202 NORTH AMERICAN FLORA [VoLuME 34 
flowers 5; ligules fully 2 mm. long; disk-flowers 7-9; corollas 3 mm. long; achenes 3-3.5 mm. 
long, hirsutulous on the angles; squamellae of the disk-flowers 4 or 5, rarely 6 or 7, of the ray- 
flowers 2, lanceolate, aristate-acuminate, nearly as long as the disk-corollas. 
TYPE LocALITy: Near Santo Domingo [City], Santo Domingo. 
DISTRIBUTION: Known only from the type locality. 
18. Pectis febrifuga H. van Hall, Ann. Hort. & Bot. 
4: 33. 1861. 
Pectis linifolia Less. Linnaea 6: 709, in part. 1831. Not P.linifolia L. 1759. 
Pectis graveolens Klatt, Bot. Jahrb. 8: 46. 1887. 
An erect annual; stem diffusely and dichotomously branched, 0.5-2 dm. high, angled, 
scabrous-puberulent on the angles; leaves linear or the lower lance-linear, 0.5-2 cm. long, 
0.5—2 mm. wide, acute or mucronate at the apex, with 3-5 pairs of bristles at the base; glands 
in a single row near each margin and in the lower and broader leaves a few additional scattered 
ones; heads solitary in the forks of the branches; peduncles 1.5—-3 cm. long; involucre 44.5 
mm. high, 2-2.5 mm. broad, narrowly turbinate; bracts 5, oblong or lance-linear, acuminate or 
apiculate, obtusely carinate below; ray-flowers 5; ligules oblong, 1-1.5 mm. long, yellow, tinged 
with red; disk-flowers 6-13; corollas about 2 mm. long; achenes 2—2.5 mm. long, short-pilose 
on the angles; squamellae of the disk-flowers 5 (rarely 4 or 6), with a lanceolate lacerate base, 
ending in an awn longer than the corollas; those of the ray-flowers 2 or with an additional third, 
much shorter and subulate squamella. 
TYPE LOCALITY: Curacao. 
DISTRIBUTION: Jamaica, Porto Rico, St. Thomas, St. Croix, and Saba; Costa Rica to Venezuela. 
ILLUSTRATION: Ann. Hort. & Bot. 4: 33. pl. 
19. Pectis leptocephala (Cass.) Urban, Sym. Ant. 5: 280. 1907. 
Pectis ciliaris Sw. Obs. 307, in part. 1791. Not P. ciliaris 1759. L. 
Chthonia leptocephala Cass. Dict. Sci. Nat. 27: 206. 1823. 
Pectis linifolia Less. Linnaea 6: 709, in part. 1831. Not P. linifolia I, 1759. 
Pectis Lessingit Fernald, Proc. Am. Acad. 33: 67. 1897. 
A leafy annual, or becoming perennial; stem diffusely branched, often procumbent, and 
rooting at the base, up to 2 cm. long, short-pilose along two decurrent lines; leaves linear, 
0.7-2 cm. long, 0.5-1.5 mm. wide, acute or obtuse, mucronate at the apex, with 2-4 pairs 
of bristles towards the base; glands in a single row along each margin; heads solitary at the 
ends of the branches or in the forks; peduncles 1-3 cm. long; involucre cylindric, 4-5 mm. high, 
1.2-2 mm. broad; bracts 5, oblong-linear or linear, obtuse or rounded at the apex, obtusely 
carinate below; ray-flowers 5; ligules 2-2.5 mm. long, yellow, often tinged with red; disk- 
flowers 4-7; corollas 2—-2.3 mm. long; achenes 2.5 mm. long, short-pilose; squamellae of the 
disk-flowers 5, rarely 4, and of the ray-flowers 2, with a lanceolate incised base and ending in 
an awn shorter than the disk-corollas. 
TYPE LocALITy: Not given. 
DISTRIBUTION: Florida, Bahamas, Hispaniola, and Cuba. 
20. Pectis Bonplandiana H. B. K. Nov. Gen. & Sp. 4: 263. 1820. 
Pectis linearis Willd.; Less. Linnaea 6: 712. 1831. 
Chthonia Bonplandiana Cass.; B. D. Jackson, Ind. Kew. 1: 532, assynonym. 1893. 
A branched annual; stem erect, dichotomously branched, glabrous or nearly so, often 
purplish, 1-2 dm. high; leaves linear or linear-lanceolate, mucronate, entire or minutely serru- 
late towards the apex, 1—2.5 cm. long, 1-3 mm. wide, with 1-3 pairs of bristles near the base; 
glands scattered; heads solitary, terminal or in the forks; peduncles 2-3 cm. long; involucre 
44.5 mm. high and about as broad, turbinate; bracts 6-8, linear-oblanceolate, acutish or 
obtuse, minutely puberulent at the tips, keeled at least half their length; ray-flowers 6-8; 
ligules nearly 2 mm. long, ascending, yellow or tinged with red; disk-flowers 12-15; corollas 
2 mm. long; achenes 3 mm. long, pilose; squamellae of the disk-flowers 5 or 6, those of the 
