166 SYNGENESIA. SUPERFLUA. 
jate or tubular. Receptacle naked. Pappus siin- 
ple, sessile. (Flowers mostly polygamous, dioi- 
cous.) 
Leaves radical, often large; scapes squamose, I-flowered, 
or thyrsoidly spiked, mostly appearing before the leaves. 
Species. 1.7. frigida. 2.sagitiata. Herb, Banks, mss. 
3. palmata. v. v. On the islands of Lake Huron, near 
Michilimakinak, in Fir woods, (Abies Canadensis ). The 
leaves considerably resemble those of Podophyllum pel- 
tatum. 
A genus almost exclusively European, with the above, 
2 species. in Siberia and 1 in Patagonia, excepted. 
566. ZINNIA. LZ. 
Calix ovate-cylindric, imbricate. Rays 5, 
persistent, entire. Receptacle pateaccous. Pap- 
pus 2 erect awns, 
_ Herbaceous; leaves opposite, rarely verticillate; flowers 
solitary, terminal; rays red or yellow. 
Species. 1.2. multiflora. A doubtful native. 
_ A genus of 5 species, all probably indigenous to Mexi- 
co, with the exception of Z. paucifora of Peru. 
567. BOEBERA. Willdenow. 
_ Calix double, exterior many-leaved; interior 
S-leaved. Receptacle waked. Pappus pilose. 
_ Annual; leaves opposite, pseudopinnate, and as well as 
af ete pecaee Tostite sade. dichotomal and 
terminal ate eatin about 12-leaved, exterior or invo- 
yen node B-leaved, spreading. Rays about 8. Pappus 
pilose, short. Nearly ied to Tagetes. 
_ Species. 1.B. glandulosa. A common weed on the 
banks of the Missisippi and Missouri to the Mountains, in 
denudated soils.—Stem decumbent and much branched. 
_ Flowers small and yellow; calix campanulate, and as well 
es aya beset with the same fetid resinous glands 
— odor.—The 
