158 UMBELI.IFER.E. (PAKSLKY FAMILY.) 



» * Umbels capitate (flower sessile). 



3. SANTCULA Fruit bristly, globular. Flowers polygamous. Involucel none. 



4. KUVNUIUM. Fruit scaly, turbiuate. Flowers perfect, bracted. Heads iavolucelled. 



# • * Umbels compouuj (flowers pedicellcd). 

 <- Fruit with bristly ribs ; the bristles in a siugle row. 

 5 DADCtJS. Fruit 9-ribbed. Leaves finely 2 -3-piiiuate. 



.^ ^-: Fruit smooth or slightly roughened. 

 *j- Fruit wiugless. laterally compressed, or twin. 



6. CICUTA. Flowers white. Fruit subglobo.se. Calyx-limb 5-toothed. 



7. CKYI'TOTjKNIA. Flowers white. Fruit oblong. Calyx-liuib obsolete. Divisions of the 



leaves lanceolate. 



8. LEPTOCAULIS. Flowers white. Fruit ovate, rough. Calyx-limb obsolete. Divisions 



of the leaves filifomi. 



9. DlSCOl'LEUKA. Flowers white. Fruit ovoid. Calyx-limb 5-toothed. Divisions of the 



leaves filiform. 



10. 11EL0SCL\DIUM. Flowers white. Fruit oblong. Calyx-limb obsolete. Involucre 1 - 3- 



leavcd, or none. 



11. SIC.M. Flowers white. Fruit globose. Calyx-teeth minute or none. Involucre 5-6- 



leaved. Leaves pinnate 



12. BUPLEUKUM. Flowers yellow. Fruit ovoid-oblong. Leaves simple. 



13. ZIZIA. Flowers yellow. Fruit ovoid-oblong ; the intervals with 3 vittac. 



14. TIIASPIUM. Flowers yellow or dark purple. Fruit ovoid or oblong ; the intervals with 



single vittoc. 

 16. LIGUSTICUM. Flowers white. Fruit elliptical, with several vittiE in each interval. 



++ ++ Fruit dorsally compressed, winged on the margins. 

 = Margins of the fruit double-winged. Flowers white. Leaves pinnately compound. 



16. ANGELICA. Carpels 3-ribbed on the back , the intervals with single vittae. 



17. AllCIIANGELICA. Carpels 3-ribbcd on the back ; the intervals with 2 or more vittae. 



18. CONIOSELINUM. Carpels 3-winged on the back ; the intervals with 2-3 vittse. 



= = Margins of the fruit single-winged. 



19. TIEDEMANNIA. Fruit broadly winged. Marginal wings remote from the 3 dorsal ones. 



Leaves simple, terete. 



20. ARCIIEMOKA. Fruit as in No. 19. Leaves pinnate or ternate. 



21. IIERACLEUM. Fruit with all the ribs equidistant. Marginal flowers sterile. Plant 



woolly. 



§ 2. Inner face of the seed concave. 



22. CIIiEROPnYLLXJM. Fruit linear-oblong, narrowed towards the apex. 



23. OSMOKRIIIZA. Fruit linear-clavate, narrowed towards the base. 



1. HYDROCOTYLE, Tourn. Marsh Tenxtwort. 



Calyx-tccth obsolete. Petals not incurved. Fruit laterally oompiesscd, or- 

 bicular. Cnq)cls 5-ribhed, the dorsal and lateral ones often obsolete, the inter- 

 mediate ones cnlarfjed. Vittaj none. — Low marsh herbs, with slender creep- 

 ing stems, and peltate or reniforra leaves. Umbels small, axillary. Flowers 

 white. 



1. H. Americana, L. Smooth ; leaves orbicular-renifonn, crcnately 7- 

 lobed ; umbels scs'.^iic, .T - ,5-fl()W(Ted ; fruit 2-ril)be(l. — Mountains of North 

 Carolina, and noriiiward. July. — Stems stolonilurous. Leaves very thin, 

 glossy. 



