2. D. pusillus (Michx.): stem (especially the lower part) retrorsely muri-
cate-hispid; leaves bipinnately divided; the segments pinnatifid, with narrow
linear lahes; leaflets of the involucre bipinnatifid, nearly as long as the
(small) umbel; prickles equalling the breadth of the ovate fruit, distinctly
barbed at the summit.—Michx.! fi. 1. p, 164 ; Pursh, fi. 1. p. 192 ; Ell.
sic. 1. p, 349 ; DC. prodr. 4. p. 213.
0. microphyllus: lower part of the stem and petioles villous with retrorse
or spreading rather soft hairs.—D. microphyllus, “ Presl, ip herb. Hcenke;”
DC. profit. 4. p. 213 ; Hook. fi, Bor.-_Am. 1. p. 271.
y. scaher: stem hirsute with short retgorse hairs, scabrous:aculeolate above.
—JD. scaber, Nutt.! mss.
Fields, and prairies, South Carolina 1 to Louisiana and: the Southern part
pf Arkansas. 0. Plains of the Oregon, Dr. Scouler! Douglas! Nuttall!
Nootka Sound, Hcenke. y. California, Nuttall! 'May.,—©, o r© Stem 1-2
feet high, scabrous (as are also the petioles and rachis) with sharp elevate^
papillce at the base of the hairs. Rays of the umbel about ■ an inch long,
Flowers ochroleucous. Fruit about half as large as in D. Carota ; the
prickles confluent and a little dilated at the base, minutely scabrous, Vittse
large and filled with a pungent oil.
Series 2, Seed with the margins involute, or deeply furrowed on, the-
fa ce . (S.ubord. CAMPYtosPEEMiE, DC.)
T r ib e X. CAUCALINE7E. Koch; DC.
Fruit laterally contracted or somewhat terete. Carpels with 5,
primary bristly or prickly ribs, o f which the lateral ones are on the
commissure: secondary ribs 4, more prominent and prickly, or
sometimes obliterated by the copious prickles filling the entire
intervals. Seed involute, or with the margin indexed.—Umbels
Compound.
39. CAUCALIS. L in n .H o ffm . Umb. p. 54. t. 1, ƒ.- 14 ; DC. prodr. 1. c.
Calyx-teeth ovate-lanceolate. Petals obovate, ernatginate, with an in-
flexed point; the exterior ones deeply 2-cleft and larger. Carpels with 5.
primary filiform bristly or prickly ribs, and 4 more prominent secondary ones,
divided into a single row of prickles. Intervals with single vittse under the.
secondary ridges, Commissure with 2 vittse. Carpophore rigid, 2-cleft at
the summit. Seed involute or the margin inflexed.—Annual herbs with
many-cleft leaves. Involucre none, or 1-2-leaved. Involucel of 3-8:
lanceolate spreading leaflets. Flowers white.; the central ones staminate,
sterile. DC\
§. Petals oval, incurved, but scarcely emarginate at the apex: involucral'
leaves 3-4, bipinnatifid (or the umbel sessile, leafy at the base?).—Cau-
CAIilUM, Nutt.
1. C. microcarpa (Hook. & Arn.): sparsely-pubescent; leaves bipinnate-.
ly divided ; the segments pinnatifid, with linear lobes ; leaves of the involucre
resembling those of the stem; umbel pf 3-5 somewhat elongated rays,
sometimes proliferous; umbellets 5-8-flowered; fruit elliptical; prickles incurved
and simple at the apex.—Hook, Sf A rn .! bpt. Beechey, suppl. p. 348,
Caucalium daucoides, Nutt. ! mss,
California, Douglas! Nuttall !—Plant about a span long, somewhat
branching, slender. Leaves finely divided, with short linear ultimate lobes,
Rays of the umbel slender, 1 or 2 of them often proliferous (or producing a
second compound umbel). Flowers white, very minute. Leaflets of the
involucel about 5, short, occasionally 3-cleft, but usually entire. Fruit about
24 lines long; prickles slender, their length rather less than the diameter of
the carpels. Seed deeply sulcate by the inflexion of the margin, but not involute.—
The fruit of this plant is exactly that of some species of Caucalis ;
but the petals are different, and the habit is somewhat peculiar, on which
account Mr. Nuttall considers it a distinct genus. He regards the umbel as.
pessile at the summit of a leafy branch,
Tuibe XI. SCANDICINEiE. Koch; DC.
Fruit compressed or contracted laterally, usually rostrate. Carpels
with 5 equal filiform or winged ribs, o f which the lateral ones are
marginal; all o f them sometimes obliterated at the base and only
conspicuous at the apex. Seed teretely convex, either furrowed on
the face or involute.—Umhels compound.
40. CHvEROPHYLLUM. L in n .; Hoffm, Umb. 1. p. 33 ; DC. prodr,
4. p. 224.
Margin of the calyx obsolete. Petals obovate, emarginate, with an in-
flexed point. Fruit not rostrate, compressed or contracted laterally. Carpels
with 5 obtuse equal ribs. Commissure deeply furrowed. Intervals with
single vittse. Carpophore 2-cleft. Seed teretely convex; the transverse
Section semilunar.—Perennial, biennial, or annual herbs. Leaves decompound,
the segments- toothed or many-cleft. Involucre none, or few-leaved,
Involucel many-leaved. Flowers white or occasionally rose color, rarely
yellow.
1. C. procumbens (Lam.) : stem decumbent or nearly erect; leaves bipinnately
divided; segments pinnatifid ; the lobes oblong or lanceolate-oblong
rather obtuse; umbels opposite the leaves, usually sessile, of 2-3 (rarely 4)
rays ; involucre none; involucels of 4-5 ovate-oblong leaflets; fruit narrowly
oblong, abruptly contracted at the summit; ribs scarcely as broad as
the intervals.—Lam. diet. 1. p. m b ; Pursh, fi. 1. p. 195 ; Nutt.! gen. 1.
L* 194 , Ell. sk. 1. p. 357: Darlingt. fi. Cest. p. 198. Scandix procumbens,
Linn. spec. 1. p. 257. Myrrhis procumbens, Svreng. Umb, vrodr. v. 29 &■
in Sch.ult. syst. 6. p. 516; T o n .! fi, p. 309. ' 1 ’ “
0. Shortii : umbels pedunculate ; fruit oblong, not eontracted at the
summit.
Moist shady places, particularly along rivers, New Jersey! to North
Carolina! South Carolina, fflliott. Arkansas, Nuttall. Kentucky (as also 0 \
Dr, Short! Aprii-May— © or © Stem 6-18 inches long, usually decumbent,
but sometimes erect or oblique, when young more or less hairy but
often nearly glabrous except the sheaths and margin of the leaves. Lobes
of the leaves 1-2 lines wide, mostly obtuse. Umbel (except in 0.) either-
entirely sessile dr on a very short peduncle. Involucel at first equal to the
umhellets, but by the growth of the pedicels becoming much shorter. Petals.