Erige.ma. UMBELLIFER/E. 645 



fully, to the tribo Hydrocotylcoj by Do Candolle. Tho sood is certainly coilo. 

 Bporinoiis. It does not, however, well agree wilii tho tribo Coriandreif : perliapH a 

 distinct tribe should be established for its reception. 



E. bulhosa (Nutt. ! 1. c.) — DC. ! prodr. I. c. Sison bulbosimi, Mirhx. ! 



Jl. 1. p. IGO. Hyilrocotylo coin|)<isitu, Pursli, Jl. 1. p. I'JO ; Spreni^. in 

 SchuU. syst. 6. p. ;355 ; Torr.! Jl. 1. p. 304. 11. aiiibigua, Fursit, I. c. 2. 



p. 732. II. bipiiiiiata, Miilil. cat. cd. 2. p. "29. 



Shady alluvial soils, Biillalo, New York ! and western parts of Pennsyl- 

 vania ! and (in llic Ohio ! iNIissonri and oilier rivers of the Westfrn Stales. 

 Mareli-Ai)ril. — Tubenms root about half an ineh in diameter. Caudex l-'J 

 inches lii2;h. Leaf .solitary < the petiole twice ;5-])aried : secondary <livisions 

 bipinnatciy dissected; the lobes linear-obloni,', mostly obtuse. Veduucles 

 solitary, or sometimes 2 or even 3, from the sheathing base of the petiole, 

 2-6 inches long. Involucral leaf resembling the radical one, but sessile and 

 much smaller. Umbellcts usually 3, at length shorter than the leaflets of 

 the involucel. Petals exj)anding. Antljers dark purple. Styles tapering, 

 with very minute stigmas.* 



* The Tribes in this Order are so numerous that a conspectus or analysis, liko 

 the following, will probably be useful to tho student : 



Ser. I. ORTHOSPERM^.— Albumen flat or flattish on the face. 



Umbels simple or imperfect : vittae usually none. 



Fruit laterally compressed 1. IIvoRocoTYLEiE. 



Fruit ovate-globose 2. Sanicule.e. 



Umbels compound or perfect : vitta; various. 



Fruit with primary ribs only, compressed laterally or didymous. 3. AsiMiXEiE. 

 Fruit with primary ribs only ; the transverse section orbicular. 4. SeselinejE. 

 Fruit with primary ribs only, compressed dorsally. 



Margin of the carpels dilated into a double wing. . . 5. Angelice.b. 

 Margin of the carpels dilated into a single wing. . . 6. PEUcEDANEiE. 

 Fruit with both primary and secondary ribs. 



Ribs all wingless : fruit somewhat laterally contracted. . 7. Cumixe^e. 

 Secondary ribs mostly winged : fruit terete or some- 

 what compressed dorsally. 



Wings unarmed 8. THASPiEiE. 



Wings prickly, or the secondary ribs armed with prickles. 



9. DaucinejE. 



Ser. 2. CAMFYLOSPERI\LE.— Albumen with a longitudinal groove 

 internally, or the margins involute. 



Fruit with both primary and secondary ribs, all prickly. . 10. Calcali.ne.e. 

 Fruit with primary ribs only, laterally compressed. 



Fruit elongated H- ScANDiciNEiE. 



Fruit turgid 12. Smvrme.e. 



Ser. 3. CCELOSPERMiE.— Albumen involute at the base and apex. 

 Fruit laterally compressed, didymous, or globose. ... 13. Cori.\.ndrex. 



