252 DICOTYLEDONS. UMBELLIFER.5:. Sison, 



9. PEUCEDANUM. 



Ge?i. involucre very short. Floiuers 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. 



l.Cr.Tnari/iwzwm.leaflets lanceolate fieshy.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. — Meadoivs. 



12. LIGUSTICUM. 



GiU. 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. Meu77i, all the leaflets setaceo-multipartite. p. 89. — Moun- 

 tain pastures. 



13. ANGELICA. 



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



Fyuit roundish, with 3 wings on each side. 

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



14. SIUM. 

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



Fridi nearly oval, laterally compressed and striated. 



1. S. latifoliu7n, stem erect, leaves pinnated, leaflets oblongo- 

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

 lakes, c^c. 



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

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



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

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

 —Sides of rivulets. 



A.S.repens, stem creeping, leaflets broadly ovate inciso-dentatc, 

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

 15. SISON. 



Cen. and partial involucre of about 4 leaves (the former wanting 

 in S. initndatum). Peals nearly uniform, inflexed. Fruit 

 ovate, striated. 



