Oedee 63.— UMBBLLIFER^. 377 



K Beak slender, longer than the fruit. Vittas none S.oandii. 17 



g Beak shorter none. — Fruit upwardly lilapid OsMOBnizA, 13 



— Fruit glabrous.— Carpela 5-rlbbed Cii.eiioi'iiyllum, 19 



— Carpels 9-ribbod Teepocaeptjs, SS 



h Marginal wlng3 twice longer than the dorsal Cosioselinum. 20 



h Marginal and dorsal wings alike. Leaflets large Ligusticl'm. 21 



i Frnit a double globe. Plant low, early flowering Eeigenia. 22 



i Fruit ovate, — with obscure, straight ribs. Tall Eulopiius. 23 



— with distinct, crinckled ribs. Largo Conium. 24 



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



j Fruit roundisb-oblong. Invoiucels none or almost none IlKLOSciAniu.M. 26 



j Fruit elliptic-oblong. Leaves large, 3-foliate, serrate Ceyptotjenia. 27 



j Frnit ovate, — smooth, strong-ribbed. Invoiucels drooping uEtuusa. 23 



— clothed with scales. Invoiucels spreading Leptocaulis. 20 



k Calyx teeth obsolete. Leaves pinnate, with serrate Ifta Sium. 32 



k Calyx teeth persistent. — Leaflets capillaceous, Vittm 4 Biscopleuea. 30 



— Leaflets linear, entire. — Yittas 16..Neubopiitllum. 81 



— Vitta) G CYNOsciAniuM. 39 



I Flowers of 3 sorts, the outer radiant. Fruit globous Coeiandeu.\i. 83 



I Flowers all alike. — Fruit terete (not compressed), ovate Plmpinella. 84 



— Fruit compressed laterally. — Vittajnone ^gopodium. 35 



— Vitt,-e8 to 12 j Apium. 86 



i Caetjm. 37 



r. HYDROCOT'YLE, L. Penny-wort. (Gr. vSup, water, kotvXtj, a 

 Vesbel ; the concave leaf often holds water.) Calys obsolete ; petals 

 equa/, ovate, spreading, entire, the point not inflected ; style shorter 

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

 pels 3-ribbed, without vittse. — Herbaceous, creeping, usually aquatic 

 plants. Umbels simple. Invol. few-leaved. 



* Leaves reniform or cordate, the baso lobea not united Nos. 1 — 3 



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



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

 orbioular, slightly lobed, crenate ; unibels sessile, 3 to 5-flowered ; fr. orbicular. — 

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

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

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

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



2 H. ranunouloides L. /. Jjvs. reniform-orbicular, deeply Z-lobed, middle lobea 

 smallest, cUl crenate ; ped. much shorter than the petioles, brcmched ; umbel 5 to 

 9-flowered, capitate. — 1( "Watera, Ta. to Ga. and La. (Halo). Sts. rooting at the 

 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. iroad-ovate, cordate, very obtuse, margin repand- 

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

 flowered. — y Muddy shores, S. Car. to Fla. 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. iutemipta Muhl. Ia}s. peliaU, orbicular, crenate: umbels capitate, proU- 

 ferotis, about b-flowered; fr. acute at base. — If In wet places, New Bedford, Mass. 

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

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

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

 umbels being successively produced on the extending peduncle. Jn. 



5 H. umbelldta L. Los. peltate, orbictUar, crenate, emarginate at base, on long 

 petioles; scapes about as long as the petioles; vmbels simple (rarely proUferous) 

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

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

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

 floating or ereot^ and i to 6' long. May — JL 



