216 NORTH AMERICAN FLORA [VOLUME 34 
PECTIS LINEARIS Llave, Reg. Trim. 1: 451 (1832) (not P. linearis Willd. 1831) is 
indeterminable. 
LORENTEA AURICULARIS ACAPULCENSIS DC. Prodr. 5: 102 (1836) has not been identified. 
PECTIS LATISQUAMA BERLANDIERI A. Gray, Proc. Am. Acad. 5: 181 (1862) has not been 
identified. 
PECTIS BRACTEATA S. Wats. Proc. Am. Acad. 25: 155 (1890) is Leucactinea bracteata (S. 
Wats.) Rydb., belonging to preceding subtribe (see page 180). 
PECTIS MULTIFLORA M. E. Jones, Contr. West. Bot. 12: 45 (1908), according to the de- 
scription, agrees with P. longipes A. Gray, except that it is said to be annual. 
22. HYDROPECTIS Rydberg, gen. nov. 
Aquatic glabrous herbs, sparingly if at all glandular-punctate.* Leaves opposite, linear, 
fleshy. Heads solitary and short-peduncled in the upper axils, discoid. Involucre turbinate; 
bracts mostly 5, obovate, somewhat overlapping, slightly concave but not at all carinate. 
Flowers all hermaphrodite and fertile, included. Corollas yellow; tube short, gradually passing 
into the narrowly funnelform throat; lobes short, ovate. Style minutely puberulent; branches 
linear-oblong, obtuse, arcuate-spreading. Achenes elongate-clavate, somewhat compressed, 
pubescent, produced at the base into a long stipe. Pappus of 10-12 unequal scabrous bristles. 
Type species, Pectis aquatica S. Wats. 
1. Hydropectis aquatica (S. Wats.) Rydberg. 
Pectis aquatica S. Wats. Proc. Am. Acad. 23: 279. 1888. 
A glabrous water-plant; stem 3 dm. long or more; leaves thick, linear, entire, blunt, 3-4 
cm. long; heads solitary in the axils; peduncles less than 1 cm. long, in age recurved; involucre 
turbinate, about 1 cm. high, 4 mm. broad; bracts 5, obovate, rounded at the apex, somewhat 
purple-tipped; flowers about 12; corollas 2 mm. long; achenes 8 mm. long, hirsute-strigose; 
pappus-bristles 10-12, the longer 2 mm. long. 
TYPE LOcALITy: Base of Sierra Madre, Chihuahua. 
DISTRIBUTION: Known only from the type locality. 
* On the specimens examined no glands were seen and the genus may not belong to this 
tribe. 
