UMBELLIFER^. 161 CONIOSELINUM. 



to cakes, sugar-plums, &c. for their fine aromatic flavor. The root also, has 

 been used as a pot-herb, and is said to be superior in flavor to the parsnep. 



Caraicuij. 



17. HYDROCO'TYLE. 

 Fruit orbicular, compressed, 3-ribbed, commissure narrow ; 

 umbel simple; involucre 4-ltaved. 



Gr. v'^ioii, water, and x.oTvX'n, vessel ; its round, concave leaf holds a drop 

 of water in the centre. Fl. perfect. Cal. obsolete. Pet. equal, ovate, spread- 

 ing, entire. Style shorter than sta. — Herbaceous plants, usually aquatic. 



1. H. America'na. 



Root tuberous; leaves reniform, roundish lobed, crenale ; umhels sessile, 

 few-flowered. A very small, delicate plant, found close to the moist earth 

 under the shade of other vegetables. Stem prostrate, creeping, a few inches 

 loner filiform. Leaves very smooth and thin, light-colored, roundish, slightly 

 7-lobed crenate and cut at base to the insertion of the stalk. Flowers mi- 

 nute, glomerate, in very small, sessile umbels or heads. Jl. Per. Feniiyicort. 



2. H. umbella'ta. 



Leaves peltate, crenate, emarginate at base ; umhels stalked, many-flowered ; 

 floicers stalked. An aquatic species, larger than the foregoing, in ponds and 

 wet grounds. Stem creeping, often submerged. Leaves peltate, the base 

 notched so as to appear somewhat reniform, floating or erect. Flowers 20 or 

 more in a sinole umbel, greenish. Jl. Per. Umhelhd Pennywort. 



3. H. INTERRU'PTA. Muh. H. Vulgaris. Mx. 



Leaves peltate, orbicular, crenate; umhels capitate, about five-flowered. 

 Grows in marshes, more rare in N. Eng. than tlie preceding. Root and stem 

 creeping. Leaves referred to by Linnasus as a perfect example of the peltate 

 form, the stem being inserted near the middle. From the centre of the um- 

 bel another is often produced. Jn. Per. Coinvwn Fennyioort. 



18. CRA'NTZIA. 

 Calyx-tube sub-globose, the margin obsolete ; petals obtuse ; 

 fruit siibglobose, the commissure excavated, with 2 vittae; car- 

 pels unequal, 5 ribbed, with a vittai in each interval. 



Small, creeping herbs, with linear or filiform, entire leaves. Umbels simple, 

 virith a few white or reddish flowers. 



C. LINEA'TA. mui. Hydrocotyle lineata. Mx. 



Leaves cuneate-linear, sessile, with transverse nerves, and obtuse at the 

 end. Grows on river banks, &c. the stems a few inches in length, creeping 

 in the mud. June. July. 



19. C O N 1' O S E L I' N U M . 

 Caljx-teeth obsolete; petals obovate, with an inflected 

 point; fruit compressed on the back ; carpels with 5 winged 

 ribs, the lateral ones marginal and much tiie broadest. 



Name compounded of Conium and Selimim. Smooth, biennial herbs. 

 Leaves on very large, inflated petioles. Stems hollow. 



0* 



