176 THE UMBELLATE FAMILY. 



! Umbels of more than 20 rays, with involucres of many bracts, and shortly 

 downy fruits 17. Seseli. 

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

 very hispid 1] 

 Fruit contracted at the top into a very short, smooth beak 30. Chcerophylltjm. 

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



C Fruit very much flattened 13 



19 J Fruit globular, ovoid, or shortly oblong .18 



1 I 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. 



1 \ Fruit smooth, with a thin or double edge .14 



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

 14 X (Tall plant, with numerous ovate segments to the leaves) . 22. Angelica. 



( Edges of the fruits single until the carpels separate 15 



- - / Leaves much dissected, with narrow or small segments . 23. Peucedanum. 



I \ Leaves consisting of a few large, broad segments 16 



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



1fi J stalks of equal length 23. Peucedanum. 



"1 Lower leaves pinnate ; or, if ternate, the middle segment longer, with a 



V longer stalk 17 



17 /Flowers yellow, all small 24. PASTINACA. 



II \ Flowers white, the outer petals of the umbels much larger . 25. Heracleum. 



1S / Flowers yellow 19 



18 \ Flowers white 22 



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

 19 \ globular carpels 35. Smyrnium. 



( Leaves pinnate or much divided. Fruit ovoid or oblong 20 



9ft / Leaves very finely divided into filiform segments . . . 16. Fcbniculum. 

 zu 1 Segments of the leaves flat, linear-lanceolate or oblong . . . . .21 

 91 f Ribs of the fruit very prominent, almost winged .... 19. Silaus. 

 Zi \ Ribs of the fruit scarcely prominent . . . .10. Carum Petroselinum. 



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

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

 zz ) teeth 14. (Enanthe. 



^Fertile flowers pedicellate ... 23 



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



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

 23-< sected segments 26 



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



^ stalked 30 



9 • / Umbels all terminal and peduncled 25 



Z4 \ Umbels mostly lateral and sessile 6. Apium. 



9 - f No involucres 9. ^Egopodium. 



Zb \ Partial involucres of several bracts, general one of very few . 18. Ligusticum. 



9 „J No involucres 12. Pimpinella. 



ZK> \ Involucres at least to the partial umbels 27 



9 h / Umbels terminal 28 



7 \ Umbels mostly lateral, almost sessile 29 



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



28 \ Fruit ovoid, under 2 lines long 11. SlUM. 



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



9q j General involucre of several bracts 11. Sium. 



y 1 No general involucre, or only a single bract 6. Apium. 



„ ft j Umbels mostly lateral, almost sessile 31 



au \ Umbels all terminal or pedunculate .32 



( Leaves with few ovate segments 6. Apium. 



31 < Leaves twice or thrice pinnate, with numerous small segments. 



( 16. (Enanthe Phellandrium. 

 oo /Erect branched annuals (not above 2 feet high) 33 



1 Perennials or tall biennials 36 



oo /Partial involucres longer than the flowers, and reflexed . . 15. JSthusa. 



\ Partial involucres shorter than the flowers, or none 34 



QA / Fruit globular or broader than long 35 



d4 \r 



L Fruit ovoid or longer than broad 41 



