UMBELLIFKR.E. (PAUSLEY FAMILY.) 1 GO 



1. T. teretifolia, T)C. (Sium tcretifolium, -K//.) — Pine-barren swamps, 

 Florida to North Carolina, and westward. August. — Stem 2° -4° high. Peti- 

 oles with cross partitions. 



20. ARCHEMORA, DC. 



Calyx 5-tootlicd. Fruit oval or ohovutc, flattened on tlic b.ack. Cai-pels with 

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

 4 - 6 on the commissure. — Smooth herbs, with pinnately-divided leaves, and 

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



1. A. rigida, DC. Leaves pinnate ; the leaflets (3-9) varying from lin- 

 ear to oblong, variously toothed or entire. (Sium rigidus, tricus])i(latum, and 

 denticulatum, Ell) — Swamps, Florida to Mississippi, and iiort'award. August 

 and September. — Stem 2° -5° high. 



2. A. ternata, Nutt. Leaves ternate, with the leaflets linear, entire and 

 strongly nerved ; the lowest ones on very long i)Ctioles. (Neuropliyllum lortgi- 

 folium, Toir. <^- Gruy.) — Low or swampy pine barrens, Florida to North Caro- 

 lina. November. — Stem slender, 2° high. Petioles of the lower leaves 1° or 

 more long. Koot bearing tubers. 



2L HERACLEUM, L. 



Calyx-teeth minute. Fruit oval, flat. Carpels with tlic 2 lateral ribs distant 

 from the 3 dorsal ones, and near the dilated margins. Yittic shorter than the 

 carpels, single in the intervals, and usually 2 on the commissure. — Stout per- 

 ennial herbs, with pinnately or tcmately divided or lobed leaves on inflated peti- 

 oles, and white flowers. Involucre few-leaved. Involucel many-leaved. Mar- 

 ginal flowers commonly larger and radiant. ' 



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

 broadly cordate, deejily lobed, hoary beneath. — Moimtaias of North Carolina. 

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



22. CH^ROPHYLLUM, L. 



Calyx-teeth obsolete. Fruit oblong or linear, tapering at the apex, contracted 

 at the sides. Carpels deeply furrowed on the commissure, with 5 obtuse equal 

 ribs. Intervals with single vittoe. — Herbs, with com]?ound finely dissected leaves, 

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



1. C. procumbens, Lam. Stem weak, sliglitly pubescent; leaves ter- 

 natcly divided ; the divisions bipinnatifid, with oblong obtuse lobes ; umbel 

 sessile, of 2-3 long rays ; involucel 4 - 5-leaved, few-flowered ; frait oblong, 

 abruptly, pointed, finely ribbed. — Shady river-banks, Mississippi to North Caro- 

 lina, and northward. April and May. (F, or @ — Stem 6' - 18' long. 



2. C. Teinturieri, Hook. & Am. More pubescent; lobes of the leaves 

 narrower and acute ; fruit oblong-linear, more strongly ribbed and tapering at 

 the apex ; otherwise like the last. — Banks of the Apalachicola River, Florida, 

 and westward. March and April. — Stem erect, 1° high. 



