538 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Flowers not yellow. 
Akenes beaked ; pappus brown, plumose; flowers violet. TRaAGoPoGON (p. 539). 
Akenes beakless. 
Pappus a crown of short scales; flowers blue... . CrcHorium (p. 538). 
Pappus plumose; flowers pink or white... .-..- - PrILoria (p. 539). 
Flowers yellow. 
Receptacle chaffy; pappus bristles plumose, not broad- 
ened at base .....-.........------------------- HyYPocHaERIs(p.541), 
Receptacle naked; pappus scale-like, or the bristles 
broadened at base. 
Heads nodding when young; scales 15 to 20, each 
bearing a very plumose awn. .....-.--------- Pritocatals (p. 541). 
Heads erect even when young. , 
Pappus of plumose or subplumose bristles 
slightly enlarged at base. 
Heads solitary on bractless scapes or 
peduncles _........-2.--..-02...-. ScorRZONELLA (p. 540). 
Heads usually several on branching 
bracteolate scapes .-..---- Lace ceeee Lrontopon (p. 541). 
Pappus of chaff-like scales. 
Scales 20 to 24, linear-lanceolate, not 
awned ........-...-.-.----------- Noruocatats (p. 540). 
Seales 5 to 10, awned, the awn rising 
from the notched apex.........-.... Uropaprrvs (p. 539). 
Bristles of pappus capillary, never plumose. 
Heads solitary; leaves all basal. 
Akenes smooth at apex, beakless or long-beaked . . . . . AGOSER’S (p. 541). 
Akenes spinulose at apex, long-beaked............-- TARAXACUM (p. 545). 
Heads several; leaves not all basal. 
Akenes flattened. 
Flowers yellow; akenes truncate, not beaked.... Soncuus (p. 549). 
Flowers blue, pink, or yellow; akenes narrow at 
summit or beaked..........-.---2-----.--- Lactuca (p. 548). 
Akenes terete, cylindric or prismatic. , 
Pappus white, persistent.............-.-.--.-.- Crepts (p. 545). 
Pappus tawny. . 
Flowers yellow (or in one species white)... . H1eractum (p. 546). 
Flowers pinkish -.-...-.-...-.----------- NABALUS (p. 548.) 
LAPSANA. 
1. Lapsana communis L. Sp. Pl. 2: 811. 1753. 
TYPE LocaLity: European. 
SPECIMENS EXAMINED: Seattle, Piper in 1888; west Klickitat County, Suksdorf 146; 
Vancouver, Piper, July 10, 1899. 
CICHORIUM. 
1. Cichorium intybus L. Sp. Pl. 2: 813. 1753. CHIcoryY. 
Type Locauity: “Hab. in Europa ad margines agrorum viarumque.”’ 
SPECIMENS EXAMINED: Seattle, Piper in 1892. 
