UMBELLIFEIUE. 149 



H. lanatum Mich. : stem sulcate, pubescent ; leafets ternate, peti- 

 oled, tomentose beneath ; leafets petioled, round-cordate, lobed > par- 

 tial involucre 5 6 leaved ; fruit orbicular. 



HAB. Meadows. June. H.Stem 35 feet high. Petioles 

 very broad and membranous. Flowers white, in very large ter- 

 minal umbels. One of our largest umbelliferous plants. Spren- 

 gel considers it identical with the foreign H. panaces Linn. 



Cow Parsnip. 



20. DAUCUS. Linn. 



Calyx with the margin 5-toothed. Petals obovate, emargi- 

 nate, inflexed ; outer ones often rayed and deeply bifid. Fruit 

 somewhat laterally compressed, ovate or oblong. Carpels 

 with 5 primary filiform ribs ; 3 intermediate dorsal ones, 2 

 lateral flat, placed on the commissure ; 4 secondary ones 

 equal, with prominent wings, parted into a simple aculeate 

 series. General involucre with many pinnate or pinnatifid 

 leaves ; partial one with many entire or trifid leafets. Flow- 

 ers white or yellow. Pentandria. Digynia. 



D. carota Linn. : stem erect, hispid ; leaves tripinnate ; leafets in- 

 cised, linear-lanceolate, acute j umbel at length concave ; fruit bristly. 

 HAB. Old fields. June Aug. tf. Stem 2 feet. Flowers white. 

 Introduced. Wild Carrot, 



SUBORDER II. CAMPYLOSPERM^. 



Albumen involute. 



21. CH^CROPHYLLUM. Linn. 



Calyx with the margin obsolete. Petals obovate, emargi- 

 nate, inflexed. Fruit not beaked, laterally contracted or com- 

 pressed. Carpels with 5 obtuse equal ribs ; lateral ribs mar- 

 gined. General involucre none or few-leaved; partial one 

 many-leaved. Flowers white, sometimes reddish. 



Pentandria. Digynia. 



C. procumbens Lam. : stem procumbent, somewhat hairy ; leaves 

 bipinnate ; segments lanceolate, rather obtuse ; umbels terminal, 3- 

 rayed ; partial involucre of 4 5 ovate ciliate leaves ; fruit prismatic, 

 smooth, crowned with the persistent styles. Scandix procumbens Linn. 

 Myrrhis procumbens and M. bifida Spreng. 



HAB. In shady situations. N. Y. to S. Car. May. 0. Stem 

 68 inches high. Umbel bifid, few-flowered. Flowers small, 

 white. 



22. OSMORHIZA. Raf. 



Calyx with the margin obsolete. Petals ovate, scarcely 

 emarginate, with a very short inflexed point. Fruit elongated, 



