AMMIACEAE 981 
31. TAENIDIA Drude. Perennial herbs with fibrous roots. Leaf-blades 
pinnate or ternately compound. Umbels compound. Involueres and involucels 
wanting: sepals obsolete or minute. Petals 
9, their tips inflexed. . Fruit oblong: carpels 
o-angled, with slender ribs and 3 oil-tubes 
in the intervals. Seeds nearly terete except 
the flat face.—One species. 
. T. integerrima (L.) Drude. Plant 3-9 
dm. tall, from a tough root: leaflets ovate 
to elliptic or bus E te, 1-3 em. 
long, entire mbel-r 10-20, elongate: 
ide sellos fnit deem ellipsoid, 3.5—4 
long. — (YELLOW-PIM PERNEL.) — Rocky 
hillsides and sandy aod various provinces, 
rarely Coastal Plain, Ga. "to La., Minn. and 
Que.—Spr. 
32. ZIZIA ee Perennial erect herbs. 
nately compound, e basal ones sometimes 
central Mac llet MA Involueres wantin UM 
Sepals prominent. Petals yellow. Fruit somewhat elongate, laterally flat- 
tened: carpels with 5 slender wingless ribs and an oiltube in each interval 
and sometimes under each rib.—Following are the only known species.—Spr.— 
sum.—MEADOW-PARSNIPS. 
Blades of the basal leaves merely toothed cordate. 1. Z. cordata. 
Blades Ys the basal leaves ternately compound. 
Blades of the basal leaves 2-ternate. 2. Z. aurea. 
Blades of the basal leaves 1-ternate. 
Blade of the terminal leaflet much longer than wide, with 
few or relatively few Blunt teeth. 
ur Ard i ae ee id, 44.5 mm. long: longer umbel- 
fone at maturi ty. 3. Z. arenicola. 
Fruit suborbleujar E broader uum ed to ovoid- 
dy 3-3.5 mm. long: longer umbel-rays 6-11 cm. 
"ra pm rity. 4. Z. Bebbii. 
Blade of tme Sna. leaflet about as wide as long or wider, 
vith ma sharp salient teeth, 5. Z. latifolia. 
1. Z. cordata en DC. Stem 4-10 dm. tall, pale-green: leaf-blades vari- 
ous, those of the basal leaves ovate « or suborbicular, 3-10 cm. long, crenate, 
io the x 
PARSNIP. )—Woods, thiekets, and prairies, 
Mie provinees, rarely Coastal Plain, Ga. 
o Mo., Ore., Alb., and Conn. 
2. Z. a (L.) Koch. Stem 3-8 dm. tall, 
sim m Ae Or p anched above leaf-blades E 
to thrice ternately compound, those of the 
basal and lower uS leaves iu T 
those of the upper stem-leaves once tern 
on short winged petioles; iue be -ovate to lanceolate, 2-8 cm. long, 
