PENTANDRIA DIGYNIA. iEthusa. 79 



Leaflets opposite, stalkless, unequally saw-toothed : the terminal 

 one, generally inore or less three-lobed. Stem six to ten inches : 

 a smaller plant even than S. inundatum. Purton. 



S. inundatum. Least TV. Leaves, above water, winged, 

 cut ; those below, in many compound, hair-like seg- 

 ments. Umbels five-flowered, in pairs. Sison inunda- 

 tum. E. B. 227. 



In ditches, pooh, and wet ground overflowed in winter. Binsey 

 Common. Port Meadow. Southleigh Heath. Otmoor. Sb.* 



Duration ? June. 



Plant procumbent, or swimming. Called by Linn, in Fl. Suec. the 

 smallest of umbelliferous plants. Habit and seeds those of Sium 

 genus. 



SISON. Honewort.' 



S. Amomum. Hedge H. Bastard Stone-parsley, 

 Leaves winged ; the upper ones divided into three. 

 Umbels erect, of about four general rays. Bases of the 

 styles globose. E. B. 9<54. Petroselinum Macedoni- 

 cum F. G. E. 1016. 



Marly, chalky, rather moist ground, under hedges. Sm. 



Duration ? July. 



Stem tall, much branched, slender, weak, spreading. Leaflets 



egg-shaped, terminal one deeply cut, saw- toothed, three-cut. 



Seeds warm, aromatic, when ripe : in an early state nauseous. 



Smell of the whole plant the same, Uke bugs. 



S. segetum. Corn H. Leaves \vinged ; leaflets roundish- 

 egg-shaped, numerous. Umbels drooping, irregularly 

 crowded. Bases of the styles dilated, depressed. E. 

 B. 228. 



In rather moist fields, on a calcareous soil. Sm. 



Duration ? July. 



Stem slender, rush-like, erect. Leaflets saw-toothed, set at nearly 



right angles with the stem. Slightly aromatic. Seeds more 



pungent. 



iETHU'SA.^ Fool's-parsley. 



JE. Cyndpium. Common F. Less Hemlock. Leaves 

 uniform ; leaflets wedge-shaped, running down the 



' Hone-wort, so called from its curing a hone, i. e. a swelling in the 

 cheek. Ger. 



2 Shining, Gr. from its shining leaves. 



