976 AMMIACEAE 
flattened: carpels ribbed, the intervals with 1-3 oil-tubes. Seed 5-angled.— 
About 8 species, natives of the north temperate zone. 
Blades ue the leaflets saliently sharp-serrate or incised: larger petals about 1 mm. 
long: n a rge, the terminal ones at least 5 cm. or more 
wide in 1. S. cicutaefolium. 
Blades of me leafiets appressed-serrate: larger petals much 
. e than 1 m pis ng: u unes small, the terminal ones, at l 
least, 4 cm. wide r less 2. S. floridanum, 
1. S. cicutaefolium Schrank. Plant 6-19 dm. tall, glabrous: stem stout, spar- 
ingly branched: stipular ig aang at of the petiole auriculate at the 
top: leaflets 7-17; blades linear to Q 
anceolate, or rar rely wider, finely, or ib 
y ind s 
2 mm. wide: : 
long bonum 10-ribbed.—( WAT TER-PARS- 
xi) —Swamps, marshes, and ponds, various 
od N. C. to La., Calif., and S Can 
Sum.-fall. 
2. S. floridanum Small. Plant smaller and 
ia 
j base of 
oblique at the top: leaflets 3—11; blades 
ovate, elliptic or elliptic- To Li oe -serrate: umbel-rays fili- 
form: larger corollas less than 2 e: fruit not seen.—Swamps and 
i E the Chipola River, Fla. 
Herbs resembling Daucus in habit and inflorescence. 
Leaf- vm finely divided or dissected. Flowers perfect, very numerous in com- 
pound umbels. Involucres and involucels abc] the braets of the former, at 
least, divided. Sepals obsolete. Petals white, very unequal, eleft at the apex. 
Fruit short: carpels 5-angled, with prominent ribs and an oiltube in each 
interval.—Seven species, natives of the Old World.—(BISHOP'S-WEEDS.) 
Leaf-segments numerous, very narrowly linear or filiform and entire: umbel-rays 
concreted into a disk-like structure at the base 1. A. Visnaga. 
Leaf-segments few, at least in the lower voile slightly broadened 
and toothed : umbel- -rays uot concreted at the bas 2. A. majus. 
1. A. Visnaga a (L. Stem 5-12 dm. tall: mature umbels and umbellets 
n the concrete bases of s. n of p latter 3—4 mm. broad: fruit 
2—2.5 lon 
place AQ 
Gulf State E to "N. & Nat. of ms 
Spr 
jus L. Stem 3- V dm. tall: mature 
bases of n. ma of the eee barely 
broad: fruit 1.5-2 mm. lo ng.— Waste places 
Coastal Plain, Ala. to Tex f 
and cult.—The plants of these peret of 
Ammi, like those of very y sp ru 
ther genera of this family, espeeially those 
of the Old World, e been us sm 
aborigines and medical men, in all coun- 
tries. 
