Fruit oblong-elliptical, flat,, with,a thickish corky winged margin: ribs yery
slender, filiform ; thé lateral ones united with the winged, margin. Intervals
broad, without true vitte, but' marked with 6-8 vitte-fike lines. Commissure
without vittas. Seed flat. Carpophore 2-parted.—Perennial (North.
West American) glabrous herbs (1-3 feet high), with tuberous roots, .and fei-
ternately much divided leaves. Involucre none. Involucels unilateral,
many-parted, with narrow segments.' Flowers brown or yellow.
1. .L. dissecta (Nutt.! ■ mss.): “ umbels radical and terminal; flowers
dark brown; segments of the leaves ovate, incisely pinnatifid ; . the lobes
lanceolate, entire-or .'2—3-toothed ; fruit many times .longer than the pedicels.
Plains óf the- Oregon near the confluence of,the Wahlanret.—Root large.
Stem about 3 feet high, glaucous, terete.- Secondary-divisions Of the leaves
bipinnatifid. Peduncle very long. Involucels shorter than, the many-flowered
umbellets; the segments subulate. Rays, of the'umbel 12-Ö4, slender,
2-4 inches in length. ..Fruit three-fourths of an inch long^pearly tasteless, ■
owing to the absence of vitte.” Nuttall.
2. L . multijida (Nutt, mss.): “ stem-low; umbel"terminal; flowers yellow;
segments of the leaves'pinnatel-y parted ; the lobes linear; fruit a little
shorter than the pedicels. . •
“ Plains of thé Oregon, east of Wallawallah, and in'the-Blue Mountains.
—Root a roundish white tuber, almost'like a turnip. ' .plant 1-2 feet high,
somewhat spreading. • Fruit very similar to that of the preceding species.”
N uttall. •' . .. • ’
3. L. ?: Californica (Nutt, mss.):' “ nearly stemless : leaves biternately
divided ; segments pinnatifid, obtusef acutely and incisely serrate,.the terminal
one 3-lobed ; petals (yellow) lanceolate, with a long inflexed point. '
“ St, Barbara, Upper California.—Leaves on long petioles) with very few
rather small divisions. Rays of the umbel' 10-18. ."Calyx minutely 5-tooth-.
ed. Fruit not seen.—Perhaps a species of Polytenia ; the leaves being
similar, but thinner.' It differs from the two preceding species in the summit
of the petals being long and subulate,- instead, of short and broad.”
N u tta ll. ’ . .
30. TIEDMANNIA. D C . mem. Urtib. p . 51, t. 12, Sf prodr. 4. p . 187.
Margin of the calyx 5-toofhëd. Petals broadly ovate, with a narrow in-
flexed point. 'Fruit, much compressed dorsally, obovate. Carpels with 5 .
filiform somewhat carinate, approximated equal ribs ; the lateral ones dilated
into a membranaceous margin nearly as broad as the dorsal disk. Intervals
with single large vittas. Commissure.with 2 vitte. Carpophore. 2-parted.
Seed flat.—A glabrous biennial? herb, with a fistulous stem; and leaves
reduced to terete'nodose petioles.’ Involucre and involucels of 5-6 subulate
leaves. Flowers white. ■ ’ . . . .
. The insertion of-the anthers in this plant does not differ from that of other
Umbeiliferee.
T . teretifolia (D C .! L c.)—CEnanthe filiformis, Walt. Car. p .-1 13", not of
L am . GE. Carolinensis, Pers. syn. 1, p . 318* Pursh, fi„ 1. p . 194. (E.
tèretifolia, M u h l.! cat. ed. 2, p . 31. Sium teretifolium, E ll. sic.-1. p . 354.
Ponds and swamps, Harper’s Ferry, Virginia, (D r. A ik in !) to F lo rid a !
and west to. Louisiana.. Aug.—Sept.—Stem 2—6 feet high, erect, fistulous,
branching above. Leaves, or rather petioles, 4—8 inches long and-2—4 lines
. iu diameter, tapering to the,summit, divided by numerous• transverse mem-
. branous-partitions. -Principal umbel of 10—15 slender rays. Fruit about 3
lines long, “ the vitte'filling the dorsal intervals.” DC.
. -31. ARCHEMORA. DC..mem, TJmb. p. 52, prodr. 4. p. 188.
, Margin of the calyx 5-toothed. Petals obcbrdate, with an inflexed point.
.Fruit lentioularly compressed, oval or obovate. Carpels with 5 filiform
obtuse approximated equidistant ribs ; the lateral ones dilated into a flatfish
margin nearly as broad as the disk'. ■ Intervals with- single large vitte.
Commissure, with 4-6 vitte. Carpophore 2-parted. Seed flat.—Perennial
glabrous herbs- (natives of the United States), growing in swamps. Leaves ■
pinnately or temately divided; the segments entire or remotely toothed.
Involucre‘none, or few-leaved. Involucels of numerous leaflets. Flowers
white,
1. A. rigida (DC.) leaves pinnately divided.
• «. segments of the leaves ovate, oblong) or lanceolate, remotely, toothed or
denticulate, Often entire.—A. rigida, tricuspidata, & denficulata, DC .!
prodr. 4. p. '188. A. rigida-, DarUngC jl. Cest. p. 195. Sium rigidius,
Linn. ( spec. 1. p. 251, S', rigidius, tricuspidatum & denticulatum, Ell. sk.
1. p.. 354. Sison .marginatum, Michx. ! fl. 1. p. 168. CEnanthe rigida,-
Nntt,! gen. 1.y>.'189'. Pastinaca rigida, Spreng, mSchidt. sust. 6. p. 586 • :
Torr.! Jl. 1. p. 314. ■
\ 0 . segmerits of the leaves linear, elongated, mostly entire__A. ambigUa
DC.J l. e. Sium longifolium, Pursh, Jl. 1. p. 194. CEnanthe ambigua,’
.N u tt! 1. c. Pastinaca ambigua, Spreng. 1. c. ; Dorr. ! I, c.
Swamps, Michigan! New York] to Florida! and to Louisiana!- Sept.
' —Stem 2-5 feet high, .erect, slender, terete, Leaves usually with 3-5 pahs
of Segments, sometimes with 2, or even a single pair, Variable in form, occasionally
obovate,-.but more eommonlyoblong-lanceolate, somewhat rigid, and
the margin cartilaginous; -in var.- «. more or jess-toothed ; the teeth often
very large, and sometimes reduced to two near the summit, fir small and
scattered. 'Umbel of many slender rays. Fruit 3 lines long; the dorsal
ribs slightly elevated and. greenish ; the lateral ones united with the rather
thm white and somewhat corky margin. Vitte dark purple-, fillin« the intervals.
Commissure white.
• 2 . A . ternata (Nutt, mss.'): “ leaves ternately: divided, with very long
petipltes ; .segments linear.—PeucedaUurH tematum, Nutt. gen. 1.- v. 182 -
DC. prodr. 4. p. 182.
“ Margin of.swamps in the pine forests of North and South Carolina- not
uncommon near Newbpm.—Stem 2-3 feet high,, slender. Leaves few; the
petiole of the lowermost nearly 2- feet long; segments petiolulate, or
fihformly attenuated downwards, 4—6 or..8 inches long, and scarcely -3"lines
wide.. Rays of the umbel- 6-9,'-elongated. Pedicels (fructiferous) more
than an inch .long. Mature fruit as large, as- that of a parsnep (Pastinaca
sativa), surrounded with a thick winged somewhat fungous margin, which is
continued internally over'the-whole commissure, and conceals the,4 vitte
Wmg of the carpels about half the-breadth of. the dorsal disk. Flowers not
seen:” Nutt'.’ 1. c. if mss.— It is singular that no specimen of this plant has
yet reached us. • • .