UMBELLIFER^. (PARSLEY FAMILY.) 181 



* * VittcE 3-6 in each interval, 



2. A. hirsuta, Ton. & Gray. Upper part of the stem and umbels softly 

 pubesceut ; leaflets oblong-ovate, sharply serrate ; fruit pubescent. — Dry 

 hills, Florida to Tennessee, and northward. July. — Stem 2° -3° high. 



3. A. deutata, Chapm. Stem slender, smooth ; umbels slightly pubes- 

 cent ; leaflets lanceolate, strongly veined, coarsely toothed; fruit smooth. — 

 Dry pine barrens, Florida. Sept. — Stem 2° -3° high, branching above; 

 teeth of the small (^') leaflets spreading. 



18. CONIOSELINUM, Fischer. 



Calyx teeth obsolete. Fruit oval. Carpels somewliat flattened on the 

 back, 5-winged, with the lateral wings twice as broad as the dorsal ones. Vittae 

 2-3 in each interval, and 4 - 8 on the commissure. — Smooth herbs. Leaves 

 thin, finely 2 - 3pinnately compound. Involucre none. Involucels subulate. 

 Flowers white. 



1. C. Canadense, Torr. & Gray. Leaflets pinnatifid, with linear-ob- 

 long lobes, the petioles inflated ; rays of the umbel slender ; fruit broadly 

 oval. — High mountains of North Carolina. August. — Stem 3° -5° high. 



19. TIEDEMANNIA, DC. 



Calyx 5-toothed. Fruit oval or obovate, flattened on the back. Carpels 

 with 5 slender obtuse ribs, winged on the margins. Intervals with single 

 vittse, and 2 - 6 on the commissure. — Smooth herbs, from tuber-bearing roots, 

 and white flowers. Involucre few-leaved or none. Involucel few- or many- 

 leaved. 



1. T. rigida, C. & R. Leaves pinnate ; the leaflets (3-9) varying from 

 linear to oblong, variously toothed or entire. — Swamps. August - Sept. 

 — Stem 2° - 5° high. 



2. T. ternata, C. & R. Leaves ternate, with the leaflets linear, entire 

 and strongly nerved ; tiie lowest ones on very long petioles. — Low or swampy 

 pine barrens, Florida to North. Carolina. Nov. — Stem slender, 2° high. 

 Petioles of the lower leaves 1° or more long. 



3. T. teretifolia, DC. Leaves reduced to rush-like petioles, the lowest 

 equitant ; involucre and involucel each 5 - 6-leaved. — Wet pine barrens, in 

 the lower districts. August - Sept. Stem 2° - 4° high. 



20. HERACLEUM, L. 



Calyx teeth minute. Fruit oval, flat. Carpels with the 2 lateral ribs dis- 

 tant from the 3 dorsal ones, and near the dilated margins. Vittae shorter 

 than the carpels, single in the intervals, and usually 2 on the commissure. — 

 Stotit perennial herbs, with pinnately or ternately divided or lobed leaves on 

 inflated petioles, and white flowers. Involucre few-leaved. Involucel many- 

 leaved. Marginal flowers commonly larger and radiant. 



1. H. lanatum, Michx. Villous; leaves very large, ternate; leaflets 

 broadly cordate, deeply lobed, hoary beneath. — Mountains of North Carolina. 

 June. — Stem 4°- 8° high, strongly furrowed. 



