ORDER 63. UMBELLIFERJE. 377 



g Beak slender, longer than the fruit. Vittso none SCAXDIX. 17 



g Beak short or none. Fruit upwardly hispid OSMORIIIZA. 13 



Fruit glabrous. Carpels 5-ribbed CII^EROHHVLLCM. 19 



Carpels 9-riobed TREPOCARPCS. 88 



h Marginal wings twice longer than the dorsal COXIOSELIXUM. 20 



ll Marginal and dorsal wings alike. Leaflets largo LIGUSTICUM. 21 



i Fruit a double globe. Plant low, early flowering ERIGEXIA. 22 



i Fruit ovate, with obscure, straight ribs. Tall EULOPIIUS. 28 



with distinct, crinckled ribs. Large CONIUM. 24 



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



j Fruit roundish-oblong. In volucels none or almost none HELOSCIADIUM. 2C 



j Fruit elliptic-oblong. Leaves large, 3-ibliatc, serrate CRYPTOTXXIA. 2T 



j Fruit ovate, smooth, strong-ribbed. Involucels drooping JETHUSA. 23 



clothed with scales. Involucels spreading LEPTOCAUHS. 29 



k Calyx teeth obsolete. Leaves pinnate, with serrate Ifts Sifc'M. 82 



k Calyx teeth persistent. Leaflets capillaceous. Vlttas 4 DKCOPLEUI-.A. 30 



Leaflets linear, entire. Vittte IC..NEUROPIIYI.LUM. 81 



Yittae 6 CYNOSCIADIUM. 89 



I Flowers of 2 sorts, tha outer radiant. Fruit globous CORIANPBUM. 33 



1 Flowers all alike. Fruit terete (not compressed), ovate .' PIMPINELLA. 84 



Fruit compressed laterally. Villa; none ^EGOPODIUM. 35 



VitttB 8 to 12 ( APIUM. 86 



( CABUM. 37 



T. HYDROCOT'YLE, L. P.ENNY-WORT. (Gr. t-dwp, water, KorvXr], a, 

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

 cqiml, ovate, spreading, entire, the point not inflected ; style shorter 

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

 pels 5-ribbed, without vittaB. Herbaceous, creeping, usually aquatic 

 plants. Umbels simple. Invol. few-leaved. 



* Loaves reniform or cordate, the base lobes not united Xos. 13 



* Leaves peltate, orbicular, the base lobes uui ted No's. 4, 5 



1 H. Americana L. Smooth and shining; st. filiform, procumbent; Ivs. reniform- 

 orbicular, slightly lobed, crenato; umbels sessile,'^ to 5-flowered ; fr. orbicular. 

 If A small, delicate plant, growing close to the moist earth beneath the shade 

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

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

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



2 H. ranunculoides L. /. Las. remform-orbicular, deeply 3-lobed, middle lobes 

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

 9-flowered, capitate. If Waters, Va. to Ga. and La. (Hale). Sts. rooting at tho 

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

 spreading and incurved. Jl., Aug. 



3 H. repanda Pers. Lvs. broad-ovate, cordate, very obtuse, margin repand- 

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

 flowered. 2{ Muddy shores, S. Car. to Fla. and La, (Hale). St. creeping. Ped. 

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

 Involucre 2 ovate bracts. Jn. Aug. 



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

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

 to Ga. (Mettauer, Feay). Rt. and stem creeping. Lvs. almost centrally peltate, 

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

 subsessile, in close umbels which become whorls in interrupted spikes by other 

 umbels being successively produced on the extending peduncle. Jn. 



5 S. 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. y In ponds and bogs, Mass, to La., rare. Sts. 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 tho scapes, slender, 

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



