AMMIACEAE. 



Vol. II. 



I. Anethum graveolens L. Dill. 

 Fig. 3122. 



Anethum graveolens L. Sp. PI. 263. 1753. 



Stem usually branched above, striate, i°-3° 

 high. Leaves very finely dissected into almost 

 filiform segments, similar to those of Foe- 

 niculum, the sheathing petioles strongly nerved 

 and scarious-margined ; umbels up to 6' broad, 

 several-many-rayed, the rays 3' long or less; 

 fruiting pedicels 5"-8" long; fruit about 3" 

 long, I J" wide. 



Waste grounds, Connecticut to Virginia, 

 in the West Indies: July-Sept. 



Also 



15. PASTINACA L. Sp. PI. 262. 1753. 



Tall erect mostly biennial branching herbs, with thick roots, pinnate leaves, and com- 

 pound umbels of yellow flowers. Involucre and involucels commonly none. Calyx-teeth 

 obsolete. Stylopodium depressed. Fruit oval, glabrous, much flattened dorsally; dorsal 

 and intermediate ribs filiform, the lateral winged, those of the two carpels contiguous and 

 forming a broad margin to the fruit ; oil-tubes solitary in the intervals and 2-4 on the 

 commissural side. Seed very flat. [Latin pastus, food.] 



About 7 species, natives of Europe and Asia, the following typica 



Madnep. Tank. Fig. 2123. 



I. Pastinaca sativa L. Wild Parsnip 



Pastinaca sativa L. Sp. PI. 262. 1753. 

 Peucedanum sativum S. Wats. Bot. King's Exp. 

 128. 1871. 



Biennial or rarely annual, glabrous, or 

 somewhat downy-pubescent, 2°-$° high, 

 the root long, conic, fleshy, the stem 

 grooved. Lower and basal leaves petioled, 

 pinnate, often lj° long, the segments 

 rather thin, ovate or oval, obtuse, sessile, 

 lobed or incised and sharply dentate, i'-3' 

 long; upper leaves generally much reduced; 

 umbels several or numerous, 2'-6' broad, 

 7-T5-rayed, the rays slender, ¥-2' long; pedi- 

 cels very slender, 2!'-^" long in fruit; fruit 

 broadly oval, 2\"-'s\" long, 2"-3" broad, 

 the dorsal and intermediate ribs not promi- 

 nent but the oil-tubes conspicuous. 



Roadsides and waste places, a very common 

 weed in nearly all parts of our area. Natural- 

 ized from Europe. June-Sept. Queen-weed 

 Eird's-nest. Hart's-eye. 



16. HIPPOSELINUM (Dalerech.) Britton & Rose. 



A perennial herb, with decompound leaves, their segments broad, cuneate, and large 

 umbels of whitish-yellow flowers. Involucre and involucels of many narrow bracts. Calyx- 

 teeth very small. Fruit ovate-oblong, somewhat flattened dorsally; primary ribs winged; 

 oil-tubes solitary in the intervals, 2 on the commissural side. [Greek, horse-parsley.] 



A monotypic genus of the Old World. 



