UMBELLIFER.E. (PARSLEY FAMILY.) 181 



* * Vittce 3-6 in each interval. 



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

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

 hills, Florida to Tennessee, ami northward. July. Stem 2 - 3 high. 



3. A. dentata, 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 somewhat flattened on the 

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

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

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

 Flowers white. 



1. C. Canadense, Torr. & Gray. Leaflets pinuatifid, 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 

 vittaa, 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. & li. Leaves teruate, with the leaflets linear, entire 

 and strongly nerved ; the 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. 

 Stout 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. r Stem 4 - 8 high, strongly furrowed. 



