PARSLEY FAMILY 205 



mistaken for it ; but its hollow stem and serrate leaves at once dis- 

 tinguish it, even when not in flower. — Fl. July, August. Perennial. 

 3. A. iniinddtum (Least Marsh-wort). — A small, usually sub- 

 merged, occasionally creeping plant ; stem stout, crooked ; sub- 

 merged leaves in hair-like segments ; floating leaves pinnate with 

 wedge-shaped leaflets ; umbels above water, very small, of 2 — 4 

 unequal rays ; flowers small, white. — Ponds ; common. — Fl. June, 

 July. Perennial. 



Apium nodifl6rum {Procumbent Marsh-wort). 



11. PETROSELfNUM (Parsley). — Branched herbaceous plants 

 with fusiform roots ; pinnate leaves ; umbels compound ; bracts 

 few ; bracteoles many ; flowers yellow or white ; sepals minute ; 

 petals roundish, entire, with a narrow, incurved point ; carpophore 

 forked ; fruit ovoid, with 5 filiform equal ridges and solitary vittce 

 between them. (Name from the Greek petros,- a rock, selinon, 

 parsley.) 



1. P. sativum (Common Parsley). — A glabrous, shining, erect, 

 much-branched plant ; stem 1 — 2 feet high, solid, ribbed ; leaves 

 tripinnate ; flowers yellow.. — A garden-escape, chiefly found on 

 old walls. Fl. June — August. Biennial. 



