IJ'2 SYNGENESIA. SUPEIUXIJA. 



A genus of near 50 species, almost exclusively indige- 

 nous to Europe and the Levant. 



581. ^ETRAGONOTHECA. L'Heritier. 

 Calix 1 leaved, 4-side(l, 4-parie(i, very broad* 



Receptacle paleaceous. Pappus none. 



Herbaceous; leaves opposite, entire; peduncles 1-flow- 

 cred, dicliotomal and terminal. 



Si'EciES. l.'V. helicnthoiiles. FUb. In the pine woods 

 of'Virg:inia, Carolina, and Georgia. Stem 2 to 3 feet high. 

 Flowers yellow.— The only species of the genus, allied t© 



582. HELIOPSIS. JJHeritier. 



Calix inibiicated, scales subovate, lined. Rays 

 ]ari?e and linear. Receptacle paleaceous, conic, 

 paUea lanceolate. Seeds 4-sided. Pappus none. 



Herbaceous; leaves opposite, ovate, 3-nerved; peduncles 

 1-flowered, dichotomal and terminal. Calix nearly simple. 



Species. 1. H. Icevis. Hab. From New York to Flori- 

 da; often near fences, thriving' by exposure. Flowers 

 golden } ellow. — The only species of the genus? 



583. BUPHTIIALMUM. L. 



Calix foliaceous. Receptacle paleaceous. Pap- 

 pus 4-tooched, or an obsolete mai'gin. Angles 

 of the sec(l])dvi]y marginated, particularly tbose 

 of the ray. 



Shrubby or herbaceous; leaves^ entire, opposite and al- 

 ternate; flowers mostly terminal. 



Species. 1. B. frntei^cens. On the sea-coast of Carolina 

 and Florida. Angles of the seed 3 or 4, acute, summit 

 huberose, obsoletely toothed, surface granulated and 

 somewhat scabrous. Chaff of the receptacle rigid, cari- 

 nated and cuspidate in the fruit, squarrose. 2. angustifoUiim. 

 Herb Banks, mss. o. sag^ittatmn. Ph. Not a JJvphthohmim? 



A genus of more tl»an 20 species indigenous to Ame- 

 rica as far as Paraguay, Furope, the Levant, Egypt, Ara- 

 bia, Ch.na and the Cape of Good Hope. A group proba- 

 bly not very natural. 



