506 277. Slum. 45. UMBELLIFERJE. Plex.cal. 



Sium repens, Lin. Suppl. PL 181. 



Marshes and inundated bogs ; perennial ; June to Aug. 

 Leaflets roundish or wedgeshape, veiny ; umhells 4 or 

 5-cut. 



4. Slum verticillatum. Whirled water-parsnep. 

 Stem upright; leaves pinnate; leaflets digitate, many- 

 cut ; lobes hairlike, divaricated, spread. 



Sison verticillatum, Lin. S. P. 3(i3. 

 Sium verticillatum, Smith Fl. Brit. 314. 



Salt marshes ; perennial ; July and August. 



Root taberculate ; tubercles many, turnipshape ; stem 

 slightly branched ; leaves mostly radical ; umbells terminal, 

 many-cut ; involucrum 5-leaved, deflexed ; involucella many- 

 leaved. 



5. Slum aromaticum. Spicy waier-parsnep. 

 Stem upright ; leaves pinnate, leaflets ovate, toothed : 



umhells upright. 



Sium aromaticum Sison officinarum, Rail Syn. 211, 1. 

 Petroselinum Macedonicum Fuchsii, Ger. em. 1016, 1. 

 Sisou vulgare, vel Amomnm Germanicum, Park. 914. 

 Sison Amomum, Lin. S. P. 362. 

 Sium Amomum, De Candolle Fl. 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; umhells terminal, 4-cut, 

 upright while flowering. 



6. Sium sesretum. Harvest water-parsnep. 

 Stem upright ; leaves pinnatifid ; leaflets many, roundish, 



toothed ; iimbellides drooping. 



Sium arvense sive sefjetura, Raii Syn. 211,2. 

 Selinumsii foliis, Ger. e;n. 1018. 

 Selinum segetale, Park. 932. 

 Sison segetum, Lin, S. P. 362. 

 Siumsegetum, De Candolle Fl. Gall. 355. 

 Honewort. Corn-parsley. 



Damp chalky corn-fields; annual; August. 

 Stem branched; leaflets ovate; terminal .'3-cut; umhells 

 terminal, 2 or 3-cut; umhellules 4 or 5-flowered. 



7. Sium inundatum. Inundation luater-parsnep. 

 Stem creeping ; lower leaves submersed, many-parted, 



hairlike, upper leaves pinnatifid, cut; umhells 2 or 3-rayed. 



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