282 Umbellaceae 
THASPIUM MEADOW-PARSNIP 
Perennial, 6—15 dm. high. Leaves ternately compound, or the lower ones sim- 
ple; leaf divisions sometimes pinnate; leaflets wide, serrate or toothed. Flowers mostly 
yellow (so in ours) ; involucre usually none; involucel-bracts small; umbel 8—12-rayed 
(ours). Calyx-lobes inconspicuous: Fruit ovoid or oblong, slightly flattened dorsally if 
at all, mostly glabrous; all the ribs strongly winged (ours); sytlopodium none; oil-tubes 
I in each interval, 2 on the commissure side. (A modification of Thapsia, a nearly re- 
lated genus which was named after the island of Thapsus.) E. (7. trifoliatum au- 
reum.) T. aureum Nutt. (Golden Meadow-parsnip) 
CONIOSELINUM HEMLOCK PARSLEY 
Perennial, glabrous or the inflorescence sometimes puberulent. Leaves ternate and 
then pinnate; leaflets ovate, acute, laciniately toothed or lobed. Flowers white: involucre 
none to conspicuous; involucel-bracts numerous, narrow. Calyx-lobes none. Fruit dor- 
sally flattened, oblong, glabrous; ribs prominent, sometimes winged; lateral ones broadly 
winged and thickish; stylopodium slightly conical; oil-tubes usually | in each dorsal 
interval, | to several in each lateral one, 2—8 on the commissure side. (From the genera 
Conium and Selinum, both of which these plants resemble. ) 
A. Unmbel-rays about 2.5 cm. long; pedicels 46 mm. long; leaflets entire to laciniate- 
toothed. W. (Selinum benthami; Selinum hookeri. ) 
C. gmelini C. & R. 
AA.  Umbel-rays 5—7.5 cm. long; pedicels 12 mm. long; leaflets laciniately pinnatifid. 
E. (Ligusticum scopulorum. ) C. scopulorum ©. & R. 
ANGELICA ANGELICA 
Perennial, stout. Leaves ternate and then pinnate or rarely merely |-pinnate. 
Flowers white or greenish-yellow or purplish; umbels large, terminal; involucre scanty or 
none; involucel-bracts small or none. Calyx-lobes mostly none. Fruit flattened dorsally, 
ovate or oblong, glabrous or pubescent; ribs strong; lateral ribs usually strongly winged, 
forming a double-winged margin to the fruit; stylopodium conic; oil-tubes |—several in 
the intervals, or indefinite, 2—10 on the commissure side. (Angelic in its supposed me- 
dicinal value.) 
A. Stem and lower leaf-surface densely ‘tomentose. W. 
A. hendersoni ©. & R. 
AA. Stem and lower leaf-surface not tomentose. 
B. © Involucels of numerous linear bracts. 
C. Involucre none; umbel-rays 2.510 cm. long; pedicels 8—12 mm. long. 
Whee ee A. genuflexa Nutt. 
CC.  Involucre conspicuous; umbel-rays 2.5 cm. or less long; pedicels 4—6 mm. 
long. E. (Thaspium aureum involucratum. ) 
A. dawsoni Wats. 
BB. Involucels usually none. 
D. Ovil-tube | in each interval. 
E. Fruit glabrous when mature. 
F. Flowers greenish-yellow or dull-purple; pedicels not distinctly united at 
at base. E, A. pinnata Wats. 
FF. Flowers white; pedicels united at base. 
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