SYNGENESIA. ZQUALIS. 135 
Puppus plumose. Seed pubescent, multistri- 
ate. ee Ste d 
Habit sinvilar to Eupatorium. Leaves alternate; flowers 
ochroleucous. — ae 
Species. 1. K. eupatorisides. 2. Critonia. On the banks 
of the Schuylkill, near Philadelphia, but rare. Ons. Leaves 
punctate and glandular on the under side. Seed numer- 
ously striate, cylindric, with a corneous cicatrice at the 
base, and connected to the smoothreceptacle by a minute 
stipe, interument valvular, 10-parted; pappus consisting 
of about 24 rays.—Thie only species of the genus. 
642. EUPATORIUM. L. 
Calix simple or imbricate, oblong. Style long 
ani semibifid. Receptacle naked. Pappus pilose, 
or more commonly scabrous. Seed smooth and 
glandular, quinquestriate. 
Shrubby or herbaceous; leaves mostly opposite, in a few 
species verticillate or alternate, generally entire, seldom 
trifid, pinnatifid or-pseudopinnate; flowers mostly corym- 
ose, very rarely paniculate; calix 3 to 5, 6 to 12 or more 
than 20-flowered, colour of the flower purple, or white, 
~ rarely blue, (as in E. celestinum.)—Integument of the seed 
smooth, but glandular, separable constantly into 5 minute 
valves, the angles connected by 5 fibrous ligatures, which 
are also common to many other genera. In many of the 
species, (and in all more or less apparent), there is a cir- 
- eular cicatrice at the base of the seed, surrounding a mi- 
nute stipe, by which the seed is attached to the recep- 
tacle. 
Srecres. 1. E. feniculaceum, 2. soronopifolium. Flow- 
ers in both these species paniculate, in 2 the leaves are 
pinnatifid, and in No 1, pseudopinnate and filiform. They 
possess the habit of Astemisia, but the calix and seeds of | 
this genus, from which they ve inseparable. 3. hisso~ 
pifelium, Pluk. Amalth. t. 395.f. 6. 4. dinearifolium. Leaves 
nearly entire. 5. sessilifolium. 6. truncatum. 7. album. 
Indigenous also to Japan. 8. lanceolatum. 9. teucrifolium- 
10. poste - “ate 11. melissotdes. 12. rotundifolium. 13. 
pubescens. 14. ceanothifolium. 15. altissimum. 16. amoe- 
num. PH. 17. trifoliatun. 18. falcatum. 19. purpureum. 
on: Stem smooth and ater gee 20. ig gine 
21. punet A mere variety of the following? 22. ver- 
ic * i Calix from 
tum. 23. perfoliatum, 24. calestinum. | 
