VAVATS LXVIU. UMBELLIFERZ. 287 
to Can. Stem 3—4fshigh, round, striate, hollow, green, branching. Leaves 
various, those of the stem generally biternate, of the branches ternate. Leaf- 
lets or segments 2—4/ long, 1—4’’ wide, linear or lance-linear, smooth, with 
slender teeth. Bulblets often numerous, opposite, and within the axils of the 
bracteate petioles. Umbelsterminal. Involucre 0. Umbellets of close, small, 
white flowers, and slight involucels. Aug. 
8. SIUM. 
Celtic sizv, water; that is, a genus of aquatic plants. . 
Calyx margin 5-toothed or obsolete ; petals obcordate, with an in 
flexed point ;-fruit nearly oval; carpels with 5 obtusish ribs, and 
-several vittee in each interval; carpophore 2-parted—% Aquatic. 
Iwas. pinnately divided. Unmbels perfect, with partial and general many- 
leaved tnvolucra. ls. white. 
1. S. patironium. Water Parsnep. 
St. angular, sulcate; Jfis. oblong-lanceolate, acutely serrate, acuminate ; 
cal. teeth elongated —A tall plant in swamps and ditches, N. J. tola.! and Can. 
Stem about 3f high, smooth, hollow, with 7 deep-furrowed and prominent an- 
gles. Leaflets or segments 4—6’ long, 1—2’ broad, equally serrate, in about 4 
pairs, with an odd one, those submerged, if any, pinnatifid. Petioles embrac- 
me the stem. Umbels large, with many-flowered rays. Flowerssmall, white. 
l Aug. 
2. S. winedre. Michx. (S. latifolium, @. lineare. Bw.) 
St. angular, sulcate; Jfts. 9—11, linear and lance-linear, finely serrate, 
acute; cal teeth obsolete—More common than the last, in swamps, N. J. to 
Ia.! and Can. Stem 2—4f high, smooth, with 7 prominent angles. Leaflets 
2—4' long, 2—4” (rarely 10”) wide, the odd and lower ones petiolulate, middle 
airs sessile. Umbels 13—2}’ broad. Involucre of 5 or 6 linear bracts, ¢ as 
ong as the 15—2I1 rays. Umbellets with numerous, small, white flowers. 
Fruit roundish, crowned with the broad, yellowish stylopodium. Jl. Aug. 
9.CRYPTOTZNIA. DC. 
Gr. xpvrrw, to conceal, ratvia, a wreath or border; from the obsolete border of calyx. 
Margin of the calyx obsolete ; petals with an inflexed point; fruit 
linear-oblong or ovate-oblong; ; carpels with 5 obtuse ribs; carpo- 
phore free, 2-parted ; vittze very narrow, twice as many as the ribs. 
—Y Lvs. 3-parted, lobed and toothed. Umbels compound, with very un- 
equal rays. Invol. 0. Involucels few-leaved. Fs. white. 
C. Canapensis. DC. (Sison Canadense. Linn.) Hone-wort. 
Iws. smooth; /fts. or segments rhomboid-ovate, distinct, entire or 2—3- 
lobed, doubly serrate, lateral ones oblique at base; umbels numerous, irregular. 
axillary and terminal.—Common in moist woods. Stem erect, 1—2f high. Lower 
petioles 2—6’ long, clasping. Leaflets 3, 2—3’ long, 1—2’ wide, petiolulate. 
Umbels paniculate, of 3—5 very unequal rays. Umbellets of 4—6 unequal 
pedicels and minute involucels. Flowers small, white. Fruit near 3’ long, 
oblong-elliptic. Jl. 
10. ZIZIA. Koch. 
Calyx margin obsolete or minutely toothed ; petals carinate, apex 
acuminate, inflexed ; fruit roundish or oval, didymous ; carpels 5- 
ribbed, lateral ribs marginal; intervals with 1—3 vitte, commis- 
sure with 2—4; carpophore 2-parted ; seeds plano-convex—% Lvs. 
divided. Unmbels perfect. Invol. 0. Involucels few-leaved. Fis. yellow. 
1. Z. aurea. Koch. (Smyrnium. Linn. Thaspium. Nuit. ?) Golden Alexanders. 
_| Las. biternate; Ufts. oval-lanceolate, serrate; wmbellets with short rays.— 
Hills and meadows, U. S.and Can. Stems 1—2f high, branching above, rather 
slender, erect, ene angular-furrowed, smooth as well as every other part of 
y 
a — 
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