252 DICOTYLEDONS. UMBELLIFER/E. >Sis07t. 



9. PEUCEDANUM. 



Gen. involucre very short. Flowers nearly uniform, those of the 

 disk abortive. Fruit ovate, compressed, striated, bordered. 



1. P. Silaus, leaves tripinnate, leaflets linear-lanceolate opposite, 

 general involucres of 1 2 leaves. p. 89. Road-sides. 



10. CRITHMUM. 



Cal. entire. Petals uniform, entire, broadest at the base, their 

 extremities curved inwards. Fruit oval, striated. 



1 .Cr.77zan/mw?w,leaflets lanceolate fleshy.p.89. Maritime rocks. 



11. HERACLEUM. 



Involucres deciduous. Flowers radiant. Petals bifid. Fruit 

 elliptical, dorsally compressed, striated. 



1. H. Sphondylium, leaves pinnated, leaflets pinnatifid incised 

 serrated, p. 89. Meadows. 



12. LIGUSTICUM. 



Gen. involucre membranaceous. Petals uniform, incurved at 

 the extremity, entire. Cal. of 5 teeth. Fruit oblong, furrowed. 



1. L. scoticum, leaves biternate. p. 89. Rocky coasts. 



2. L. Meum, all the leaflets setaceo-multipartite. p. 89. Moun- 

 tain pastures* 



13. ANGELICA. 



Gen. involucre often wanting. Petals uniform, incurved, entire. 

 Fruit roundish, with 3 wings on each side. 



l.A.sylvestris, leaflets equal ovate serrated. p. 90. Moist woods. 



14. SIUM. 



Involucres of many leaves. Petals heart-shaped, nearly uniform. 

 Fruit nearly oval, laterally compressed and striated. 



1. S. latifolium, stem erect, leaves pinnated, leaflets oblongo- 

 lanceolate equally serrated, umbels terminal, p. 90. Sides of 

 lakes, &c. 



2. S. aiigustifolium, stem erect, leaflets unequally lobed and ser- 

 rated, umbels pedunculate opposite the leaves, p. 90. Ditches. 



3. S. nodiftorum, stem procumbent, leaves pinnate, leaflets ovate 

 subequally serrated, umbels sessile opposite to the leaves, p. 90. 

 Sides of rivulets. 



4. S. repeiiSy stem creeping, leaflets broadly ovate inciso-dentate, 

 umbels pedunculate opposite the leaves, 'p. 90. Sides of rivers. 



15. SISON. 



Gift* and partial i?ivolucre of about 4 leaves (the former wanting 

 in S. inundatum}. Pe'als nearly uniform, inflcxcd. Fruit 

 ovate, striated. 



