Donkeyweed

Pectis martinicensis Urban, Symb. Ant. 5: 276. 1907
Pedis cartlmsianorum Duss, H. Ant. I-r. 372. 1897. Not P. carlhusianorum I^ss. 183-1.
A leafy annual; stem ascending or recurvcd-erect, rarely procumbent, 3-6.5 dm. high, puberulent in lines, simple below, dichotomously or trichotomously branched; leaves oblonglinear or linear, 2-3.5 cm. long, 3-5 mm. wide, scarcely connate, with 2-8 pairs of bristles below; glands sparse, scattered; heads solitary in the axils, on peduncles 2-6 mm. long; involucre 6-6.5 mm. high; bracts 5, linear-oblong to obovate-oblong, carinate at the base, obtuse or rounded at the apex; ray-flowers 5; ligules oblong, about 2 mm. long; disk-flowers 12 or 13; corollas about 2.5 mm. long; achenes 3.5 mm. long, hirsutiilous on the angles; squamellae of the disk-flowers 5, of the rays 4 or 5, lanceolate, aristate-acuminate, equaling the disk-corollas.
T-iTE locality: Sainte Anne, Martinique.
Distribution: Martinique.

Pectis ciliaris L. Syst. Nat. ed. 10. 1221. 1759
Chlhonia glaucescens Cass. Diet. Sci. Nat. 9: 173. 1817. Pectis anceps Less. Linnaea 6: 715. 1831.
Chlhonia ciliaris Cass.; Steud. Nora. Bot. ed. 2. 1: 360. 1840. Pectis ciliata Steud. Nom. Bot. ed. 2. 1; 360, as synonym. 1840.
A branched annual; stem erect or ascending, 0.5-2.5 dm. high, with ascending branches, pilose along decurrent lines; leaves oblong-linear or linear, 1.5-3.5 cm. long, 1.5-5 mm. wide, connate at the base, with 4-12 pairs of bristles, mostly below the middle, but sometimes along the whole margin; glands scattered; heads clustered at the ends of the branches, 2-8 together, sessile or short-peduncled, the peduncles less than 3 mm. long; involucre 4.5-5.5 mm. high, 2-2.5 mm. broad; bracts oblong-linear to broadly oblong, obtuse or rounded at the apex; rayflowers 5; ligules about 2 mm. long, ascending; disk-flowers 4-12; corollas 2-3 mm. long; achenes 2.5-3.5 mm. long, hirsutulous; squamellae of the disk-flowers usually 5, of the ray-flowers 2 or 3, linear-lanceolate, aristate-attenuate, as long as the disk-corollas.
Ti'PE locality: [Not given, but supplied in L. PI. Jam. 24.] Jamaica.
Distribution: Greater Antilles.

Pectis ciliaris, the donkeyweed, is a species of Pectis and is an annual plant. Its floral region is the Caribbean, mainly Puerto Rico.