COULTER AND ROSE—NORTH AMERICAN UMBELLIFERAE. 101 
26. DERINGA Adans. Fam. PI. 2: 498. 1763. 
Cryptotaenia DC. Coll. Mém, 5:42. 1829. 
Calyx teeth obsolete. Fruit flattened laterally, linear-oblong, gla- 
brous. Carpel with obtuse equal ribs, each subtended by a very broad 
group of strengthening cells (2 groups also on the commissural side). 
Stylopodium slender conical. Oil-tubes solitary beneath each rib (as 
well as in the intervals), 2 to 4 on the 
commissural side. Seed face plane or 
nearly so. 
Glabrous perennials, with thin tri- 
foliolate leaves, no involuecre, involucels 
of minute bractlets or none, and white 
flowers. 
Type species, Sison canadense Vi. Sp. 
Pl. 1: 252. 1753. 
A genus of 3 or 4 species, one of 
which is North American. 
1. Deringa canadensis (I..) Kuntze, Rey. 
Gen. Pl. 1: 266. L891. Fig. 25. 
Sison canadense L. Sp. Pl. 1: 252. 1753. 
Cryptotaenia canadensis DC. Prodr. 4: 119. 
1830, 
Erect, rather slender, 3 to 9 dm. high, 
branching; leaflets large, ovate, 5 to 15 
em. long, acute or acuminate, doubly serrate, often lobed; lateral 
leaflets oblique at base, usually sessile or nearly so; terminal leaflet 
abruptly narrowed into a petiolule (usually winged); umbels irregular 
and unequally few-rayed: pedicels very unequal, from 2 to 30 mm. 
long; fruit 4 to 6 mm. long, often becoming curved. 
Type locality, **in America septentrionali.” 
From New Brunswick to Georgia, and west to South Dakota and 
Texas. 
Fig. 25.—Deringa canadensis: a,b, x 8. 
Specimeris examined: Very few of the specimens of this commion species are cited, 
ONTARIO: Kingston, Fowler, September 8, 1883; Ottawa, Macoun, August 9, 1894. 
Vermont: Peacham, Alice Stevens, June 25, 1892; Manchester, J/. A. Day 86, 
July 1, 1898. 
Massacuusetts: Great Barrington, Pollard, August 1, 1894; Hadley, Alice Stevens, 
July 20, 1895. 
Connecticut: Bridgeport, Hames, August 8, 1894, 
New York: Oxford, Coville, June 21, 1883. 
Maryann: Laurel, Knowlton, June 138, 1897. 
Disrricr oF CouumBra: Zoological Park, Pollard 529, July 26, 1895. 
PENNSYLVANIA: Rawlinsville, in 1882. 
Onto: Lorain County, Ricksecker, July 9, 1894. 
InpraNaA: Near Indianapolis, Coville, August, 1892. 
Iuuinots: Near Chicago, Babcock; Naperville, Umbach, June 28, 1898. 
