PIPER—FLORA OF THE STATE OF WASHINGTON. 555 
Receptacle not conical. 
Heads slender-peduncled; pistillate flowers apetalous.... CoruLa (p. 586). 
Heads clustered; corollas present. 
Pappus a short crown; heads corymbed ...-.-..- -- - TANACETUM (p. 586). 
Pappus none; heads racemose or panicled ..._..-..- - ARTEMISIA (p. 586). 
SENECIONEAE, 
s 
Shrub; involucre of 4 to 6 concave bracts.........-.-.-.--------- TreETRADYMIA (p. 590). 
Herbs. 
Leaves all or mostly opposite. .........---.-.-------------- ArNIcA (p. 580) 
Leaves alternate. 
Flowers whitish or pinkish; heads rayless. 
Leaves large, palmately lobed, mostly basal. 
Styles united nearly to the apex .-.......-..-- Perasites (p 593). 
Styles united about half way ................. CAcaALtopsts (p. 594). 
Leaves entire; stems leaiy. 
Heads about 10-flowered, corymbed..-.-..----- Luna (p. 594). 
Heads 4 to 6-flowered, paniculate.... 2.2.2.2... RaINnIERA (p. 594). 
Flowers yellow; ravs present (except in a few species of 
Senecio). 
Involucre hemispheric; heads solitary.......-------- CrocipiuM (p. 594). 
Involucre campanulate; heads usually corymbose.... SENECIO (p. 595). 
INULEAE. 
Pappus capillary, at least in pistillate flowers. 
Plants dioecious or polygamo-dioecious. 
Pappus of staminate flowers clavate.....-...-2..-.----- ANTENNARIA (p. 601). 
Pappus of all the flowers similar..............2.....-- / ANAPHALIS (p. 606). 
Plants not dioecious; flowers all fertile. ...........-222.--.- GNAPHALIUM (p. 606). 
Pappus none. 
Receptacle naked; leaves large, green above. ........-.---- ADENOCAULON (p. 607 ). 
Receptacle chaffy; leaves small, woolly... .....-.---------- PstILOCARPHUS ( p. 607). 
CYNAREAE., 
Akenes obliquely attached by one side at base. 
Heads not subtended by bristly leaves .........-...--..----- CENTAUREA (p. 608). 
Heads sessile, subtended by bristly leaves..........--.-.--- Cnicus (p. 608). 
Akenes attached by the very base, not oblique. 
Filaments monadelphous below .....-....-.--------------- SityBuM (p. 609). 
Filaments distinct. 
Leaves and usually the involucral bracts prickly......... Carpuus (p. 609). 
Leaves not prickly. 
Heads globose, the bracts hook-tipped -.....-..-..- ‘Arotium (p. 611). 
Heads oblong, the bracts unarmed... ....-.----.---- SaussuREa (p. 611). 
EUPATORIUM. 
1. Eupatorium occidentale Hook. Fl. Bor. Am. 1; 305. 1833. 
Krystenia occidentalis Greene, Leaflets 1: 9. 1903. 
Type Locauity: ‘On the low hills between the north and south branch of Lewis and 
Clarks River in stony places.’’ Collected by Douglas. 
Rance: Washington and Idaho to California. 
SPECIMENS EXAMINED: West Klickitat County. Suksdorf 865: Ellensburg. Elmer 423 
1084; Klickitat River, Suksdor}, July 16, 18sv. 
