872 AMMIACEAE 
1. Burytaenia Texàna T. & G. Stems 2-8 dm. tall, branching especially above : 
leaf-blades 5-12 cm. long, pinnately dissected ; segments narrowly linear or oblong, often 
toothed : umbels 5-8 cm. broad: bracts pinnately parted: rays 8-15, slender, variable in 
length, 2-5 cm. long: pedicels 5-10 mm. long: corolla white, 3-4 mm. broad: fruit oval, 
4 mm. long, with pale conspicuous wings. 
On prairies, the Indian Territory, Oklahoma and Texas. Spring and summer. 
31. FOENICULUM Adans. 
Biennial or perennial caulescent herbs, often aromatic. Leaves alternate: blades 
delicately pinnately decompound. Flowers in naked compound umbels. Hypanthium 
truncate. Petals yellow or yellowish. Disk with a stout conic stylopodium. Styles short. 
Fruit elongated, nearly terete : carpels 5-ribbed : oil-tubes solitary in the intervals, and 2 on 
the inner side. FENNEL. 
1. Foeniculum Foenículum (L.) Karst. Foliage glabrous, glaucescent. Stems 
5-15 dm. tall, branched : leaf-blades finely dissected ; segments filiform or linear-filiform : 
umbels peduncled, 2-10 em. broad ; rays 5-6, often glaucous, 2-5.8 mm. long at maturity : 
corolla yellowish green: fruit oblong, 5 mm. long. [F. vulgare Gaertn. ] 
In waste places and fields, New Jersey, Pennsylvania to Florida and Texas. Summer and fall. 
32. LIGUSTICUM L. 
Perennial aromatic herbs. Leaves alternate: blades ternately compound ; leaflets 
toothed. Flowers perfect, in compound umbels, Involucres of a few narrow bracts. In- 
volucels of numerous narrow bractlets. Hypanthium truncate. Petals white, broadened 
upward, inflexed at the apex. Disk with a conic stylopodium. Fruit more or less elon- 
gated, scarcely flattened : carpels with sharp prominent ribs and 2-6 oil-tubes in each inter- 
val. Seeds dorsally flattened, sometimes angled. ANGELICO. NONDO. 
1. Ligusticum Canadénse (L.) Britton. Foliage glabrous or nearly so. Stems 
5-20 dm. tall, branched above: leaf-blades 3-4 times ternately compound ; leaflets oblong, 
elliptic-oval or ovate, 3-8 cm. long, serrateor dentate-serrate, the teeth often acuminate: rays 
8-20, 2-8 cm. long: fruit oblong or oval, 4-6 mm. long, the ribs narrowly winged : oil- 
tubes 2-3 in the intervals, and 6 in the commissural side. 
In rocky or rich woods, Pennsylvania to Missouri, Georgia and Alabama. Spring and summer. 
33. THÁSPIUM Nutt. 
Perennial caulescent herbs. Leaves alternate: blades 3-foliolate or ternately com- 
pound or the basal ones sometimes simple: leaflets toothed, incised or lobed. Flowers 
perfect, in compound umbels. Involucres and involucels wanting or the latter of a few 
bractlets. Sepals deciduous. Petals yellow, or deep purple, inflexed at the apex. Disk 
flat. Styleslender. Fruit somewhat longer than broad, terete, slightly dorsally flattened : 
carpels with more or less strongly winged ribs and 1 oil-tube in each interval. Seeds 
slightly angled. MEADOW PARSNIP. : 
Leaf-blades mostly ternate, the divisions thick, finely toothed. 1. T. trifoliatum. 
Leaf-blades mostly biternate or more divided, the divisions thinnish, incised or lobed, 
or pinnatifid. 
Leaf-divisions toothed or cleft: fruit fully 5 mm. long. 2. T. barbinode. 
Leaf-divisions pinnatifid : fruit less than 5 mm. long. 3. T. pinnatifid IL 
1. Thaspium trifoliàtum (L.) A. Gray. Foliage glabrous. Stems 2-7 fate tall, 
sparingly branched, often zigzag : leaf-blades various, those of the basal or lower stem- Mex 
ovate and undivided or 3-foliolate ; segments ovate to lanceolate, serrate ; petioles slen i , 
often longer than the blades : upper stem-leaves similar to the divided basal leaves ; se un 
shorter than the blades, winged : umbels peduncled, 2-5 cm. broad : rays variable in length : 
corolla dark purple : fruit oval, 4 mm. long, the ribs prominently winged. 3 
In thickets and on sunny slopes, Rhode Island to Illinois, North Carolina and Tennessee. een re 
and fall.—The state with yellow corollas, is T. trifoliatum aüreum (Nutt.) Britton ; itis rather more 
distributed than the form with purple corollas. 3-12 
2. Thaspium barbindde (Michx.) Nutt. Finely pubescent or glabrate. Stems ee 
dm. tall, more or less widely branched, pubescent about the nodes : leaf-blades id vi 
twice ternately compound, 5-15 cm. long ; segments commonly ovate, coarsely ps : in 
ternately cleft or parted: umbels peduncled, 3-7 cm. broad: rays sometimes un! rji 
length : corolla rather pale or light yellow : fruit oblong or oval, fully 5 mm. long, 8! 
