600 UMBELLIFER^. Crantzia. 



4 ■ 5. H. repanda (Pers.) : leaves reniform-cordate, repandly toothed ; the 

 younger ones and the petioles hairy, but at length glabrous ; peduncles near- 

 ly half as long as the petioles, hairy ; umbel capitate, mostly 3-4-flowered ; 

 involucre 2-leaved ; fruit reniform, truncate, 4-ribbed on each side. — Nutt. ! 

 gen. Pers. syn. 1. p. 302; Rich. Hydr. f. 14 ; Ell. ! sic. 1. p. 347 ; DC. ! 

 prodr. 4. p. 62. H. reniformis, Walt. Car. p. 113? Poir. suppl. 3. p. 21. 

 H. ficarioides, Michx. fl,. 1. p. 160, not of Lam. Glyceria repanda, Nutt. 

 gen. 1. p. 177. 



Margin of ponds &c. often in rather dry places, South Carolina ! to Florida I 

 and Louisiana ! — Stem creeping, throwing up several leaves from each node. 

 Leaves 1-2 inches long, somewhat coriaceous, often truncate at the base : 

 petioles 3-6 inches long. Involucre of 2 concave bracts, nearly as long as 

 the almost sessile flowers. Stamens shorter than the petals : anthers brown. 

 Fruit with prominent ribs, somewhat reticulated. — According to Chamisso, 

 this species is not distinct from H. Asiatica ; but our specimens of the latter 

 have thinner and broader leaves, very short peduncles, and more reticulated 

 orbicular and emarginate fruit. 



-/' 6. H. ranunculoides (Linn, f.) : glabrous ; leaves orbicular-reniform, 

 3-5-lobed, the lobes crenate ; peduncles much shorter than the petioles ; 

 umbels 5-10-flowered ; pedicels very short ; fruit orbicular, smooth, very 

 obscurely 2-ribbed on each side. — Linn. f. ! suppl. p. 177 ; Rich. Hydr. f. 

 18 ,- Cham. &; Schlecht. in Linneea, I. p. 373 ; DC. prodr. 4. p. 65. H. 

 cymbalarifolia, Muhl. Cat. ; Ell.! sk. I. p. 346. H. Americana, Walt.? 



In water, Pennsylvania [Muhlenberg) and Virginia [Mr. Ruffner !) to 

 Georgia! and Louisiana! July-Aug. — Stems creeping or floating. Leaves 

 1-2 inches in diameter, usually deeply 3-lobed ; the middle lobe narrower 

 and a little longer than the others : petioles 4-12 inches long. Peduncles 

 1-3 inches long : pedicels 1-2 lines in length. Fruit about a line and a half 

 in diameter. 



H. cor data of Walter appears, from a leaf in his herbarium, to be Villarsia 

 trachysperma, Ell. (Limnanthemum, Gmel.) 



2. ? CRANTZIA. Nutt. gen. 1. p. 177 ; DC. prodr. 4. p. 70. 



Calyx-tube subglobose ; the margin obsolete. Petals roundish, entire, 

 obtuse. Fruit subglobose ; the commissure excavated, nearly orbicular, with 

 2 vittae. Carpels unequal, with 5 filiform ribs ; 3 of them dorsal and narrow, 

 the others marginal and united with the thick corky margin which surrounds 

 the fruit : intervals with single vittae. Carpophore adflate, indistinct. Trans- 

 verse section of the seed orbicular. — Very smafl glabrous creeping herbs, 

 (natives of the United States and Buenos Ay res), with linear entire succulent 

 leaves (or rather petioles without a lamina), marked with transverse lines. 

 Umbels few-flowered, simple, involucrate. Flowers white or rose-color, 

 perfect, pedicellate. 



-^ 1. C. lineata (Nutt.) : leaves cuneate-linear, obtuse, shorter than the 

 peduncles. — Nutt. ! I. c. ; DC. ! prodr. 4. p. 71. Hydrocotyle lineata, 

 Michx. ! fl. 1. p. 162 ; Rich. Hydr. f. 38 ; Ell. sk. 1. p. 347 ; Torr ! fl. 1. 

 p>. 304. H. ligulata, Bosc. ' Elatine foliis oppositis, Gronov. ! Virg. 

 p. 62. 



Muddy banks of rivers, near salt water, Massachusetts, Rhode Island ! 

 and Connecticut ! to Louisiana ! May-July. — Stems creeping and rooting 



