UMBELLIFEREAE. 



[You II. 



i. Heracleum lanatum Michx. 

 Cow- Parsnip. (Fig. 2641.) 



Heracleum lanatum Michx. Fl. Bor. Am. i: 

 166. 1803. 



Very stout, tomentose-pubescent, 4-8 

 high, the stem ridged, often 2' thick at the 

 base. Leaves petioled, ternately divided, 

 very pubescent beneath, the segments 

 broadly ovate, or orbicular, cordate, stalked, 

 lobed and sharply serrate, rather thin, 3 / -6 / 

 broad; petioles much inflated; umbels 6'- 

 12' broad, 8-3<>rayed, the rays stout, a'-4' 

 long; pedicels 3"-9" long in fruit; fruit 

 broadly oval, or obovate, 4 // -6 // long, 3"- 

 4#" broad, finely pubescent, emarginate at 

 the summit. 



In moist ground, I^abrador and Newfound 

 land to Alaska, south to North Carolina, Mis- 

 souri, Utah and California. Called also 

 Master-wort June-July. 



7. 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 coin- 

 missural side. Seed very flat [ Latin Justus, food.] 



About 7 species, natives of Europe and Asia. 



Madnep. Tank. (Fig. 2642.) 



i. Pastinaca sativa L. Wild Parsnip. 



Pastinaca sativa L. Sp. PI. a6. 1753. 

 f*enctdanum satirum S. Wats. Bat King's 



Kxp. 128. 1871. 



Biennial or rarely annual, glabrous, 

 or somewhat downy-pubescent, 2-5 

 high, the root long, conic, fleshy. 

 Lower and basal leaves petioled, pin- 

 nate, often i% 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, y-15-raycd, the rays slen- 

 der, %'-*' long; pedicels very slender, 

 3 // -6 // long in fruit; fruit broadly oval, 

 2#"-3#" long, 2 // -3 // broad, the dor- 

 sal and intermediate ribs not prominent 

 but the oil-tubes conspicuous. 



Roadsides and waste places, a very com- 

 mon weed in nearly all parts of our area. 

 Naturalized from Europe. June-Sept. 



8. IMPERATORIA L. Sp. PI. 259. 1753. 



Tall perennial herbs, with large ternately divided or 2-pinnate leaves, sheathing petioles, 

 and compound umbels of white flowers. Calyx-teeth obsolete. Petals ovate, mostly emar- 

 ginate. Fruit much flattened dorsally, broadly oval, to nearly orbicular, the lateral ribs 

 broadly winged all around, the intermediate and dorsal ribs slender, wingless; oil-tubes soli- 

 tary in the intervals and 2 on the commissural side. Styles and Stylopodium short. Seed- 

 face flat. [Named for its supposed forceful medicinal properties.] 



About 10 species, natives of the Old World. 



