UMDELLIFER-E. 101 



the petals. Ovary consisting of 2 united carj)els, covered by 

 the colierent calyx, 2-celled, an ovule in eacli cell. Styles 2. 

 Fr//// consisting ot;2 carpels, adhering to a conniion axis', in- 

 dehiscent ; marked with 5 longitudinal ribs. Seeds anatro- 

 pous embryo minute. Herbaceous plants with fistular stems. 

 Lf«iTJ compound, with sheathing petioles. Flowers in umbels. 



Gents I. IIYDROCOTYLE. 



Margin of the calyx obsolete. Petals entire, ovate, acute. 

 Fruit flattened laterally, 5-ribbed. Herbaceous plants, aquatic, 

 creeping stems and peltate or cordate leaves. Floicers'm sim- 

 ple umbels. Involucre 4 leaved. 



1. H. A.MEKicAxA. Stem glabrous. Leaves orbicular reniform, slightly 7- 

 lobetl, crcnate. Flowers few, sessile in axillary umbels. 



\Vhitc or grcenisfi. %.. May — June. IMountuins. 2-3 inches. 



2. II. IvrERRrrTA. Sfem terete, glabrous, creeping, branching. Leaves 

 peltate, orbicular, doubly crenate. Flowers in small nearly sessile capitate 

 umbels, 4-8-rio\vercd. Fruit broad. 



White. '2|.. Through tlic summer. In wet soils. 3—4 inches. 



3. II. r PA. ^'r^m glabrous, creeping or floating. Lfavcs peltate, 

 crcnate, ci: c at the base. Umbels many flowered on long peduncles. 

 Fruit somewhat tumid. Calyx slightly toothed. 



Whi'c. '4- Through the summer. Grows in bogs. 4-6 inches. 

 t. H. Repa.vda. Stem creeping. Leaves cordate, rounded, repandly 

 toothed, hr. ' 2. Flowers in capitate umbeL?,3-4-flowered. Frutl 



reniform, i i side, involucre 2 concave bracts. 



White. 1^. 1 liruugh the summer. Damp soils. 

 5. II. Raxtnculoides. .S'/em creeping or floating, glabrous. Z>aies ren- 

 iform, 3-5-kibcd, crcnate. VmUls 5-JO-ri^owered on peduncles shorter than 

 the petioles. Fruit orbicular, smooth, obscurely 2-ribbed on each side. 

 White. '2J.. July — Aug. Around ponds. 



Gexus II. CRANTZIA. 



Calyx with a subglobose tube, margin obsolete. Petals roun- 

 dish, entire, obtuse. Fruit, subglobose nearly orbicular. Car- 

 pe/s unequal, small, glabrous, creeping plant with linear, entire, 

 succulent leaves. Umbels few flowered, simple. 



1. C. LT?rEATA. (Hydrocofyle Lineata of Elliott.) Leaves erect, 1-2 inch- 

 » long, marked with transverse hues, cuneate, linear, obtuse. Umbels 8-12 

 flowered. Involucre 5-6 leaved. 



While. % April — May. Low country. 



Gents III. SANICULA. 



Calyx with 5 somewhat foliaccous teeth. Petals obovate, 

 erect, with a long indexed point. CariJfh clothed with hoop- 

 ed bristlo.«, without ribs. Seeds hemispherical. Radical 

 leaves on long petioles, 



1. S. Mabilaxdica. Stem terete, glabrous, dichotomoiasly branclied towards 



9* 



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