206 



UMBELLIFER.E 



2. P. segetum (Corn Parsley). — Well distinguished by its 

 slender, branched stem, which is remarkably tough and wiry ; its 

 small pinnate haves, of which the lower ones wither early, while the 

 cauline ones are few, small and inconspicuous ; and the irregular, 

 few-rayed umbels and small whitish floivers. — Cornfields and waste 

 places ; not uncommon. — Fl. August, September. Biennial. 



12. C i c u T A 

 (Water-Hemlock). — 

 Tall, glabrous plants; 

 leaves 2 — 3-pinnate ; 

 umbels compound, 

 many-rayed ; bracts 

 1 — 2, very narrow, 

 or none ; bracteoles 

 several, small, un- 

 equal ; sepals ovate, 

 acute ; petals white, 

 with an infiexed tip ; 

 fruit constricted, 

 with two globose 

 carpels. (Name, a 

 Classical Latin name 

 for Hemlock.) 



1. C. virbsa 

 (Water - Hemlock, 

 Cowbane). — Root 

 fibrous ; stem stout, 

 hollow ; lower leaves 

 long-stalked, 2 — 3- 

 pinnate; upper 

 leaves 2 - ternate ; 

 leaflets lanceolate, 

 2 - serrate ; umbels 

 large, long-stalked, 



flat-topped ; flowers minute, white. — Ponds and ditches ; rare. 



Very poisonous, as are also the species of (End?ithe, to which also 



the name Water- Hemlock is often applied. — Fl. July, August. 



Perennial. 



*i3. Ammi, represented by the one species, A. md/us, a glau- 

 cous, scentless, and tasteless plant, 6 — 24 in. high, repeatedly 

 forked with diverging branches ; pinnate lower leaves with obovate, 

 finely serrate leaflets, decompound upper leaves with linear seg- 

 ments ; and stalked 10 — 30-rayed umbels of white flowers, with 



PETROSELfNUM segETum (Corn Parsley). 



