iro 
46. COMPOSITiE. 
2. P. dysenterica (Gaert.) ; 1. ohlony cordate at the base clasp- 
ing obsoletely toothed downy beneath, st. ])anicled woolly, heads 
axillary and terminal corymbose, rays muck longer than ike disk. 
— Inula Sm., E. B. 1115. — St. 12 — 18 in. high, leafy. Heads 
larger than those of the last, florets bright yellow. Outer pappus 
cuplike, crenulate. — Damp places. P. VIII. IX. Fleabane. 
Tribe III. Senecioidece. 
Style of the hermaphrodite florets cylindrical with long linear 
branches terminated by a bunch of hairs or sometimes extending 
beyond the hairs into a short cone or elongated apj)endage. 
Stigmatic lines broad and prominent and extending as far as the 
hairs. 
Section 1. HELIANTHE./E. Heads usually heterogamous 
and radiant, or homogamous and discoid. Anth. without ap- 
pendages. Receptacle paleaceous throughout or only near the 
margin. Cor. of the hermaphrodite florets with thickened lobes. 
Pap])us aristate in our plants. 
11. (25.) Bidens iiMM. 
1. B. tripartita (L.); 1. stalked 3-partite: segments lanceolate 
serrate, fr. obovate-cuneate usually with 2 bristles. — E. B. 1113. 
— St. 1 — 3 feet high, with opposite branches. L. narrowed into 
winged footstalks, sometimes lmdi^^ded, sometimes pinuate-5-fid. 
Heads terminal, solitary, slightly drooping. Florets brownish- 
yellow. — /3. radiata ; with radiant 3-toothed marginal florets. — 
Marshy places. A. VIII. IX. 
2. B. cernua (L.) ; 1. sessile connate lanceolate undivided ser- 
rate, fr. cuneate usually with 3 — 4 bristles. — U.R.l 1 14. — St. 1- — 3 
feet high, w ith opposite branches. L. simple, nan-ow'ed below but 
not stalked. Heads terminal, solitary, drooping. Florets brown- 
ish-yellow. — /3. radiata ; with radiant marginal florets. Coreopsis 
Bidens (L.) St. 1. 16. — Watery places. A. VIII. LX. 
Section 2. ANTHEMIDE.^. Heads usually heterogamous, 
ray female or neuter. Anth. without appendages. Branches of 
the style truncate, bearded, very rarely terminated by a cone. 
Pappus often wanting or crownhke, rarely formed of scales or 
capillary haii-s. 
12. (20.) Anthemis XiHw. 
* Scales of the receptacle lanceolate or oblong terminating in 
an acute rigid point. 
1. A. arvensis (L.); receptacle conical, iv. tetragonal, 1. bipin- 
