Fifth class. 
15 
— Ls 2—3-ternati sect, with rather large segments. Only 
in the lower valley of the Rhone Trochiscanthes. 236. 
— Ls, at any rate the upper ones, 2—several times pinnatisect 
99 
99. Inner face of the albumen deeply channelled 100 
— Inner face of the albumen flat or almost so (in Meum 
slightly hollowed).. 101 
100. Ribs of the fr. prominent, sharp. Fr. 20—25 mm long 
Myrrhis. 260. 
— Ribs of the fr. obtuse, distinct all over the fr. Fr. 
6—10 mm long .... Chserophyllum. 259. 
— Ribs of the fr. obtuse, visible only at the thin tip of 
the beak.Anthriscus. 257. 
101. Fr. broader than long, almost didymous. Cal. distinctly 
toothed. Marsh pis .... Cicuta. 216. 
— Fr. oblong, oval or almost globular . . . 102 
102. Fr. distinctly comnressed. Lower Is simply pinnatisect 
103 
— Fr. (in transverse section) orbicular or very slightly 
compressed. Ls 1—several times pinnatisect 101 
103. Cal.-teeth obliterated. Fr. ovoid. Yittao clavate, only 
reaching about half way down the fr. Only at Geneva 
* Sison. 223. 
— Cal. with 5 distinct teeth. Fr. oblong. Yittse not clavate. 
Only by the lake of Geneva . . Ptychotis. 221. 
104. Involucel of 3 long leaflets, reflexed outwards 
Aethusa. 232. 
— Involucel not reflexed outwards . . . 103 
105. Cal.-teeth very distinct on the fr., large. Fr. oblong- 
cylindric with obtuse ribs. Marsh or water pis 
Oenanthe. 231. 
— Cal.-teeth indistinct or short . . . 100 
106. Furrows with 3—several vittee. Inner face with 4—8 vittee 
107 
— Furrows with 1 vitta. Inner face with 2 vittee 10S 
107. Pets slightly rolled up at the point, but not indented. 
Mountain pis with thick fibrous rt-stocks Meum. 240. 
— Pets indented with an inflexed point. Only in Tess. 
and the French Jura .... Ligusticum. 238. 
108. Fr.-ribs with a narrow, almost membranous wing. Cal.- 
teeth obliterated .... Cnidium. 235. 
— Fr. with thick ribs. Cal.-teeth distinct Seseli. 234. 
109(97). Fr. appearing 2-winged on each side, on account 
of the lateral divergent wings of the 2 mericarps 110 
— Fr. appearing 1-winged on each side owing to the la¬ 
teral wings of the 2 mericarps lying one on the other 
112 
