Orhbr 63.— UMBBLLIFER^. 377 



g Beak slender, longer thnn the fruit. Vittao none Scandix. 17 



g Beak short or norle. — Fi-uit upwardly hispid OsMoainzA. 13 



— Fruit glabroua. — Carpels 5-ribtied Cuj3ropiiyli.um. 19 



— Carpels 9-ribbed Tukpocakpus. 88 



ll Marginal wings twice longer than tho dorsal Cokioselin vm. 20 



h Marginal and dorsal wings alike. . Leaflets Large Ligusticum. 21 



i Fruit a double globe. Plant low, early flowering Eiugenia. 23 



i Truit ovate, — with obscure, straight ribs. Tall Eulopuus. 2S 



— with distinct, crinckled ribs. Largo Conium. 24 



j Fruit roundish-oblate (broader than long). With involucels Cicuta. 25 



j Fruit roundish-oblong. Involucels none or almost none IIelosciadium. 26 



j Fruit elliptic-oblong. Leaves large, 3-foliate, serrate CkyptoTjK.n'ia. 2T 



j Fruit ovate, — smooth, strong-ribbed. Involucels drooping iEriiuSA. 2S 



— clothed with scales. Involucels spreading Lbptocaulib. 29 



k Calyx teeth obsolete. Leaves pinnate, with serrate Ifts Slu.M. 33 



k Calyx teeth persistent. — Leaflets capillaceous, Yittaj 4 Discopleup.a. 30 



— Leaflets linear, entire. — ^Yittfe IG. . Neurophyllum. SI 



— Yittffi 6 Cynosciadium. 39 



1 Flowers of 2 sorts, the outer radiant. Pruit globons Cokiandf.u-m. 33 



1 Flowers all alike. — Fruit terete (not compressed), ovate PiMriNBLLA. 34 



— Fruit compressed laterally. — Yitta) none .^Egopouium. 35 



— Vitta) 8 to 12 J Apidm. 86 



\ Caeum. 3T 



1. HYDROCOT'YLE, L. Penny-wort. (Gr. v3o)p, water, KorvXr], a 

 vessel ; the concave leaf often holds water.) Caly.^ obsolete ; petals 

 equal, ovate, spreading, entire, the point not inflected ; stylo shorter 

 than stamens ; fruit laterally flattened, the commissure narrow ; car- 

 pels 3-ribbod, without vittte. — Herbaceous, creeping, usually aquatic 

 . plants. Umbels simple. Invol. few-leaved. 



* Loaves reniform or cordate, tho base lobes not united Nos. 1 — 3 



* Leaves peltate, orbicular, the base lobes united Nos. 4,5 



1 H. Americana L. Smooth and sinning; st. fiUfomj, procumbent; Ivs. reniform- 

 orbicular, slightly lobed, crenate ; umbels sessile, 3 to 5-flowered ; fr. orbieular. — 

 y A small, delicate plant, growing clo.?e to the moist earth beneath the shade 

 of other vegetables. Can. to S. Car. Stg. branching, 2 to 6' long. Lvs. thin, 1 

 to 2' diam., on petioles 2 to 3' long. Ms. greenish white, small, nearly sessile, 

 in simple, capitate, sessile, axillary umbels. Jn. — Aug. 



2 H. ranunculoides L. /. Lvs. rcniform-orbicular, deeply 3-lobed, middle lobes 

 smallest, all crenate ; ped. much shorter than the petioles, branclied ; umbel 5 to 

 9-flowered, capitate. — If "Waters, Ya. to Ga. and La. (Hale). Sts. rooting at the 

 joints, or floating. Petioles thick, 4 to 8' long, ped. 1 to 2'. Lvs. veiny. Sty. 

 spreadmg and incurved. . Jl., Aug. 



3 H. repdnda Pers. Lvs. Iroad-ovaie, cordate, very obtuse, margin repand- 

 dentate ; ped. simple, much shorter than the petioles, umbels capitate, 3 or 4- 

 flowered. — 11 Muddy shores, S. Car. to Pla. and La. (Hale). St. creeping. Ped. 

 radical, slender, 2 to 3' high, the petioles 3 to 8'. Fr. large, broader than long. 

 Involucre 2 ovate bracts. Jn. — Aug. 



4 H. intemipta Muhl. Lvs. peltate, orbicular, crenate: umbels capitate, proli- 

 ferous, about 5-flowered; fr. acute at base. — 21 In wet places, New Bedford, Mass. 

 to Ga. (Mettauer, Peay). Et. and stem creeping. Lvs. almost centrally peltate, 

 thin, 8 to 13" diam. Petioles 2 to 6' long. Ped. longer than the petioles. Pis. 

 subsessile,- in close umbels which bepome whorls in interrupted spikes by other 

 umbels being successively produced on the extending peduncle. Jn. 



5 H. umbellata L. Lvs. peltate, orbicular, crenate, emarginate at base, on long 

 petioles ; scapes about as long as the petioles; umbels simple (rarely proliferous) 

 fls. 20 to 30, pedicellate. — % In ponds and bogs. Mass, to La., rare. Stg. creep- 

 ing, often submersed, several, inches long. Lvs. 8 to 12'' diam., notched at base 

 so as to appear reniform. Petioles a little eccentric, and with the scapes, slender, 

 floating or erect, and 4 to 6' long. May-^Jl. 



