1887. | BOTANICAL GAZETTE. 137 
leaves 1 to 3-ternate; leaflets ovate to lanceolate, acute, with 
cuneate base, coarsely cut-serrate, often ternately cleft or 
parted: flowers light yellow: fruit broadly oblong, about 3 
lines long and 2 lines broad, with mostly 7 ribs prominently 
winged, the other three not at all winged or but slightly so 
(figs. 59, 60).—Banks of streams, New York to Minnesota 
and southward. Fl. May and June. 
‘ Var. angustifolia has narrower, more sharply cut leaflets, 
and is readily distinguished from the type.—Marion Co., 
Illinois (Bebb), Westmoreland Co., Pennsylvania (W. W. 
Bailey), Montgomery Co., Indiana (/rose). 
3. T. Walteri Shuttlew. Loosely branched, pubescent on 
the joints, puberulent on branchlets, umbels, and fruit, with 
fewer leaves: leaves 1 to 3-ternate ; leaflets 1 to 2-pinnatifid, 
lobes linear or oblong, one or two leaves near the base often 
very large and long petioled (petioles sometimes a foot long): 
flowers light yellow: fruit oblong, 14 to 24 lines long and 1 
to 1}lines broad, all the ribs winged, generally three of them 
narrowly so (figs. 61, 62). 7. pinnatifidum Gray, Manual. 
—Barrens and mountains, North Carolina to Kentucky. 
ZIZIA' Koch.—Fruit ovate to oblong, flattened laterally: 
‘«arpel with 5 primary ribs (not at all winged): oil-ducts 
arge, solitary in the intervals, two on the commissural side, 
and a small one in each rib: seed-section round, indented 
beneath the oil-ducts: stylopodium wanting; styles long 
(figs. 63-66).—Smooth perennials (1 to 3 ft. high), with 
ows. 
In separating the species of Zizia from the Thaspium aur- 
‘eum group we are very much indebted to Mr. M. S. Bebb, 
rm the differences discovered in fruit structure. 
1. Z.aurea Koch, Umbel. 12g. Radical leaves very long- 
petioled, all but the uppermost leaves 2-3-ternate ; leaflets 
‘ovate to lanceolate, sharply serrate: rays 15 to 25, stout, 1 OF 
dei asia tes gtartia. oo atin 1o Shares De a 
1It must be remembered that the Zizia of Gray’s Manual is a semen 4 n 
2 The western species that has been variously called Seseli Hallii, Musenium reenel, 
and Carum () Hallii is evidently a Zizia. Its fruit characters are identical ie oe am 
Zizia, and had Koch’s genus been retained it would probably have already inclu 
Species as Zizia Hallii. ee ae 
