t?6 THE UMBELLATE FAMILY. 



( Umbeig of more than 20 rays, with iuvolucres of many bracts, and shortly 



10 J downy fruits 17. SESBLt 



| Umbels of few rays (seldom 10). Bracts few or none. Fruits burr-like or 



\ very hispid ... - 11 



t1 /Fruit contracted at the top into a very short, smooth beak 30. CH<KBOPHYLLUM. 

 11 \Fruit covered to the top with hooked bristles .... 31. CAUOALIS. 



Fruit very much flattened 13 



Fruit globular, ovoid, or shortly oblong 18 



Fruit long and narrow, at least four times as long as broad. (Leaves much 



cut, and often hairy.) 46 



Fruit rough, surrounded by a thick edge 26. TORDYLIUM. 



Fruit smooth, with a thin or double edge .14 



( Fruit bordered by 2 thin edges or wings, which are distinct before the fruit ripens. 

 14 < (Tall plant, with numerous ovate segments to the leaves) . 22. ANGELICA. 



( Edges of the fruits single until the carpels separate 16 



Leaves much dissected, with narrow or small segments . 23. PEUCEDANUM. 



Leaves consisting of a few large, broad segments 16 



Lower leaves of 3 large, 3-lobed segments, equal to each other, and with 



stalks of equal length 23. PEUCEDANUM. 



Lower leaves pinnate; or, if ternale, the middle segment longer, with a 



longer stalk . . 17 



Flowers yellow, all small 24. PASTINACA. 



Flowers white, the outer petals of the umbels much larger . 25. HERACLEUM. 



Flowers yellow 19 



Flowers white . .32 



Leaves two or three times ternate, with large broad segments. Fruit of 2 



globular carpels .35. SMYRNIUM. 



Leaves pinnate or much divided. Fruit ovoid or oblong 20 



Leaves very finely divided into filiform segments . . .16. FfflNlGULUM. 



Segments of the leaves flat, linear-lanceolate or oblong 21 



Ribs of the fruit very prominent, almost winged . . . .19. SlLAUS. 

 Ribs of the fruit scarcely prominent . . . .10. CARUM Petroselinum. 

 Fertile flowers and fruits, at least the central ones, nearly sessile, sur- 

 rounded by small, barren, pedicellate flowers. Fruit corky, with calyx- 

 ' 



1 



22 ^ teeth . ". . ' . .'".*. . . . . ."14. OENAWTHK. 



Fertile flowers pedicellate ... 23 



Leaves twice or thrice ternate, with large, broad segments (of 2 or 3 inches) . 24 

 Leaves once pinnate, with several pairs of sessile, ovate, lanceolate, or dis- 

 sected segments .26 



Leaves much dissected, with small or narrow segments, the lower ones 



stalked 30 



Umbels all terminal and peduncled . 25 



Umbels mostly lateral and sessile .6. APIUM. 



No involucres 9. J5GOPODIUM. 



Partial involucres of several bracts, general one of very few . 18. LIGUSTICUM. 



No involucres 12. PIMPINELLA. 



Involucres at least to the partial umbels 27 



Umbels terminal 28 



Umbels mostly lateral, almost sessile . 29 



( Fruit ovoid, about 2 lines long or more . 46 



28 < Fruit ovoid., under 2 lines long 11. SIUM. 



( Fruit nearly globular, not 1 line long ... ... 7. SISON. 



*n ( General involucre of several "bracts . . . . . . .11. SIUM. 



No general involucre, or only a single bract 6. APIUM. 



30 



31 



Umbels mostly lateral, almost sessile 31 



Umbelsalltenninalorpedunculate 32 



Leaves with few ovate segments 6. APIUJL 



Leaves twice or thrice pinnate, with numerous small segments. 



16. (ENAHTHK Phellandrium. 



Erect branched annuals (not above 2 feet high) . 33 



Perennials or tall biennials 36 



Partial involucres longer than the flowers, and reflexed . . 15. ^ETHUSA. 



Partial involucres shorter than the flowers, or none 34 



Fruit globular or broader than long . 36 



Fruit ovoid or longer than broad .... ..... 41 



