138 UMBELLIFERJE. 



P. saliva Linn. : stem smooth, sulc ate ; leaves pinnate; leafets sessile, 

 subpubescent beneath, oblong, incised, terminal one 3-lobed ; umbels large, 

 terminal ; fruit oval, much compressed. 



Fields and waste places. N. S. July. @).Siem 24 feet high. Leaves 

 somewhat shining. Umbels large, fastigiate. Flowers yellow. Introduced. 



Wild Parsnip. 



19. HERACLEUM. Linn.Covr Parsnip. 



(Named from Hercules, who is said to have brought this or some allied plant 

 into use.) 



Calyx 5 -toothed. Petals obovate, emarginate, with an in- 

 flexed point ; outer ones often rayed, bifid. Fruit dorsally and 

 flatly compressed, surrounded by a membranaceous margin. 

 Carpels with 3 equidistant ribs on the back ; 2 lateral ribs with 

 a dilated margin. General involucre caducous, often few- 

 leaved ; partial one many-leaved. 



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

 tomentose beneath ; leafets petioled, round-cordate, lobed ; partial involucre 

 5 6-leaved ; fruit orbicular. 



Meadows. Can. as far N. as lat. 58. to Penn. W. to Oregon. June. 2J.. 

 Stem 4 8 feet high. Petioles very broad and membranous. Flowers white, in 

 very large terminal umbels. One of our largest umbelliferous plants. 



American Cow Parsnip. 



20. DAUCUS. Linn. Carrot. 

 (From Savicos, the ancient Greek name for the Carrot.) 

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

 nate, with an inflexed point ; 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; p'artial one with many entire or trifid leafets. 



D. Carota Linn : stem erect, hispid ; leaves tri-pinnate ; leafets pinnatifid ; 

 segments linear-lanceolate, acute ; leaves of the involucre pinnatifid, nearly 

 as long as the umbel. 



Old fields, road sides, &c. Throughout the U. S. July, Aug. (g). Stem 

 2 3 feet high, branching. Umbel with a solitary colored abortive flower in the 

 centre, when in seed concave. Wild Carrot. 



SUBORDER II. CAMPYLOSPERM^E. 



Seed with the margin involute or deeply furrowed on the 

 face. 



