506 277. Sium. 45. UMBELLIFERtE. PLex.caL 
Sium repens, Lin. Suppl. PI. 181. 
Marshes and inundated bogs; perennial; June to Aug. 
Leaflets roundish or wedgeshape, veiny ; umbells 4 or 
5-cut. 
4. Sium verticillatum. Whirled water-parsnep . 
Stem upright ; leaves pinnate ; leaflets digitate, many- 
cut ; lobes hairlike, divaricated, spread. 
Sison verticillatum, Lin. S. P. 363. 
Sium verticillatum. Smith FI. Brit. 314. 
Salt marshes ; perennial ; July and August. 
Root tuberculate ; tubercles many, turnipshape ; stem 
slightly branched; leaves mostly radical; umbells terminal, 
many-cut ; involucrum 5-leaved, deflexed ; involucella many- 
leaved. 
5. Sium aromaticum. Spicy water-parsnep. 
Stem upright ; leaves pinnate, leaflets ovate, toothed ; 
umbells upright. 
Sium aromaticum Sison officinarum, Itaii Syn. 211, 1. 
Petroselinum Macedonicum Fuchsii, Ger. em. 1016, 1. 
Sison vulgare, vel Amomum Gerrnanjcura, Park. 914. 
Sison Amomum, Lin. S. P. 362. 
Sium Amomum, De Candolle FI. Gall. 3456. 
Bastard stone-parsley. Hedge honewort. 
Damp chalk or clay soils; annual; August. 
Stem 2 feet high, much branched ; uppermost leaflets 
slenderest, sometimes pinnatifid; umbells terminal, 4-cut, 
upright while flowering. 
6. Sium segetum . Harvest luater-parsnep . 
Stem upright; leaves pinnatifid; leaflets many, roundish, 
toothed ; umbellules drooping. 
Sium arvense sive segetum, Raii Syn. 211,2. 
Selinum sii foiiis, Ger. em. 1018. 
Selinum segetale, Park . 932. 
Sison segetum, Lin. S. P. 362. 
Stum segetum, De Candolle FI. Gall. 355. 
Honewort. Corn-parsley. 
Damp chalky corn-fields ; annual; August. 
Stem branched; leaflets ovate; terminal 3-cut; umbells 
terminal, 2 or 3-cut; umbellules 4 or 5-flowered. 
7. Slum inundatum . Inundation water-parsnep. 
Stem creeping; lower leaves submersed, many-parted, 
hairlike, upper leaves pinnatifid, cut; umbells 2 or 3-rayed. 
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