)J. Thalictrum Le Meadow Rue, 
Tall perennial herbs from short rootstocks, Leaves bi- or trie 
ternately compound, the cauline leaves alternate, the petioles diloted 
and clasping at the base. «lowers in a terminal raceme or panicle, 
dioecious or polygamous. Sepals 4-5, Greenish, petal-like, petals wanting, ° 
Stamens numerous, the anthers linear, mucronate, the filaments hair-like, 
Pistils 4-15, Fruit an inflated achene, bearing the persistent slender 
Pes aaa 
stvle, 
Leaves elliptical to obovate in outline, 1-3 lobed, 
the lobes entire; body of .achene 3-3.5 mm, . 
long, plump i. Te purpurascens 
Leaves rotund in outline, 3-lobed, the lobes bluntly 
toothed; body of achene 4-5 mm, long, flattened, T. occidentale 
1. T. purpurascens Le Stems 60-80 cm, tall, erect, glabrous; leaves ternate, | 
then once or twice pinnate, the leaflets sessile or on short petioles, firm, | 
glabrous, 1,.5-2.5 cm. long, frequently elliptical and subentire or bearing 
a single lobe, more commonly obovate, 5-lobed above the middle or near the 
avexX, rounded or subcordate at the base, the lobes blunt, mucronate, the 
veins on the lower surface »rominent; flowers both verfect and unisexual; 
achones 5-3.0 mm. long, plump, the versistent style half again as long, ribs 
8-9, rather corky, the sinuses acute, j 
Clarkg Fork valley below .iceksville, 2100 ft., Leiberg 1576; Sandvoint, 
Christ 204; vack Xe, Christj546, 
Fr 
2e Te occidentale Gray. Stens .5-l m, tall, slender, glabrous or minutely 
glendular-puberulent, fistulous; leaves commonly triternate, or the ultimate 
segments pinnate, leaflets orviculsr-cuneiform in outline, truncate, cuncate 
or the terminal ones even cord=se at the base, shallowly 3-lobed, the lobes 
