me é 
170 SYNGENESIA. SUPERFLUA. 
we 
America, extending into the warmer parts of the United 
. < States. Growing generally on the banks of rivers. 
575. 8 SIEGESBECKIA. L 
Exterior calix 5-leaved, spreading, Ftatior 
many-leaved, pentangular subequal. Rays only 
on one side of the flower. Receptacle paleace- 
ous. Pappus none. Seed partly 4-sided. 
Herbaceous; leaves opposite, asperate, somewhat 3- 
nerved; flowers pedunculate, axillary and terminal. 
‘Species. 1. §. laciniata. 2. flosculosa. North Califor- ~~ 
nia._-A genus of 4 species, 1 indigenous to ag 218 
America, and 1 to Iberia. 
(576. PHAETHUSA. Geriner. 
Calix imbricated. Rays 1 to 8. Receptacle 
paleaceous. Seeds hispid. Pappus none. — 
ere: leaves opposite, entire, S-nerved, branches 
Brkaics 1. P. americana. -}. A very doubtful plant, _ # 
577. VERBESINA. Z. 7 vs 
_ Cali many-leaved, leaflets dtisnamodss in a 
doable: series. Rays about 5. it dae | pale- 
_ aceous. ‘Pappus 2-awned. 
us or shrubby; leaves more tegponal and eo 
te or opposite; lowers axillary oF te coe 
© Specizs-1. V. virginica. Flowers white; stem naked. Pe 
2. Siegesbeckia. Leaves opposite. 
3. * laciniata. Stem grooved, naked; leaves sessiias si- 
suately laciniated, subpinnatifid, attenuated at either ex- 
tremity, and acute; branches con maboe; flowers white; 
subim| ; seeds imn Has. In South 
