ONAGRARLE. XIII. ISNARDIA. 



697 



smooth ; leaves opposite or tern, petiolate, ovate-lanceolate ; 

 flowers nearly terminal, pedicellate. Q.t H. Native of Java. 

 Isnardia trifolia, Poir. suppl. 3. p. 188. There is no specimen 

 of this plant in the herbarium of Burmann, and therefore the 

 plant is truly doubtful. 



Three-flowered Ludwigia. PI. 1 foot. 



Cult. None of the species of Liidmgia are worth cultivating, 

 unless in botanic gardens. The perennial species should be 

 grown in small pots, placed in pans of water. The seeds of 

 annual species may be reared in a hot-bed, and afterwards planted 

 out in the open border, in a moist situation. 



XIII. ISNA'RDIA (so named by Linnaeus in memory of M. 

 Antoine Dante Isnard, member of the Academy of Sciences, 

 and who published descriptions of some plants in their memoirs 

 for 1716. c.). D. C. prod. 3. p. 59. Isnardia and Ludwigia, 

 Lin. gen. no. 156. and 153. Juss. gen. p. 333. and p. 319. 

 Lam. ill. t. 77. Ludwigia, Ell. sketch. 1. p. 214. Spreng. 

 syst. 1. p. 444. but not of Roxb. Dantia, Du Pet. Th. gen. 

 p. 49. 



LIN. SVST. Tetrdndria, Monogynia. Tube of calyx ovate 

 or subcylindrical (f. 99. a. d.}, short, adhering to the ovarium ; 

 limb 4-parted, permanent (f. 99. b.). Petals sometimes 4, al- 

 ternating with the lobes of the calyx, sometimes only rudiments 

 of petals, and sometimes wanting altogether. Stamens 4 (f. 

 99. e.) in front of the calycine lobes. Style filiform from the 

 base, deciduous ; stigma capitate. Capsule obovate or nearly 

 cylindrical (f. 69. f.), tetragonal, 4-valved, 4-celled, many- 

 seeded, opening at the cells. Aquatic or marsh herbs. Leaves 

 entire, alternate, or opposite. Flowers axillary, sessile. 



SECT. I. LUDWIGIA'RIA (see Ludmgla for derivation). D. C. 

 prod. 3. p. 60. Ludwigia, Lin. Petals 4, sometimes larger 

 than the calycine lobes, or equal in length to them, and some- 

 times smaller. 



* Leaves alternate. 



1 I. ALTERNirdLiA (D. C. prod. 3. p. 66.) stem erect, branched, 

 smoothish ; leaves alternate, lanceolate, rather scabrous on 

 the margins, and hoary beneath ; capsule obovate-globose, te- 

 tragonal, with the angles winged ; calycine lobes large, co- 

 loured ; petals a little longer than the calyx. If.. B. H. Native 

 of Virginia and Carolina, in marshes. Pluk. aim. t. 203. f. 2. 

 amalth. t. 412. f. 1. Ludwigia alternifolia, Lin. spec. 173. 

 Lam. ill. t. 77. Gaertn. fr. 1. p. 31. f. 8. Ludwigia macro- 

 carpa, Michx. fl. bor. amer. 1. p. 89. Ludwigia ramosissima, 

 Walt. Ludwigia microcarpa, Link. enum. p. 141. Habit of 

 Jussicea octdndra. Petals oval, yellow. Root emetic, and is 

 called Bowman's root. 



Var. ft, salicifblia (D. C. 1. c.) flowers on very short pedicels. 

 If.. B. H. Native of Carolina. Ludwigia salicif olia, Poir. suppl. 

 3. p. 512. Lateral nerves of leaves confluent near the margins, 

 giving the leaves the appearance of being 3-nerved. 



far. y, uniflora (D. C. 1. c.) stem simple; flower terminal. 

 Native of New Jersey. Ludwigia uniflora, Rafin. in Desv. 

 journ. bot. 1. p. 224. 



Alternate-leaved Isnardia. Fl. June, Jul. Clt. 1752. PI. 2 ft. 



2 I. LINEA'RIS (D. C. prod. 1. c.) stem erect, branched, gla- 

 brous, angular above ; leaves alternate, linear, acute, glabrous ; 

 capsule oblong-turbinate, somewhat tetragonal, longer than the 

 lobes of the calyx, which are linear-lanceolate ; petals longer 

 than the calyx. Q. W. H. Native of Carolina, in ditches and 

 marshes. Ludwigia linearis, Walt. car. p. 89. Pursh, fl. amer. 

 sept. 1. p. 110. Ell. sketch. 1. p. 215. Ludwigia angustifolia, 

 Michx. fl. bor. amer. 1. p. 88. Ludwigia angustifolia ft, Poir. 



VOL. n. 



suppl. 3. p. 513. Flowers sessile, solitary, axillary. Petals 

 obovate, yellow. 



Linear-leaved Isnardia. PI. 2 to 5 feet. 



o I. VIRGA'TA (D. C. 1. c.) stem erect, twiggy, rather pubes- 

 cent ; leaves linear, obtuse, glabrous ; flowers pedicellate, dis- 

 posed in an elongated, spicate, nearly naked, raceme ; capsule 

 globose, tetragonal ; petals length of calyx. TJ. . H. Native of 

 Lower Carolina, in dry sandy woods. Ludwigia virgata, Michx. 

 fl. bor. amer. 1. p. 89. Ludwigia lutea, Bosc. ined. Ludwigia 

 virgata, Ell. sketch. 1. p. 216. is perhaps different. Petals 

 yellow. Lobes of calyx, when in flower, longer than the tube. 



Twiggy Isnardia. PI. 1 foot. 



4 I. HIRSU'TA (Rccm. etSchultes, syst. 3. p. 477.) stem erect, 

 branched, rather diffuse, hairy ; leaves alternate, lanceolate, rather 

 hairy on both surfaces ; capsule globose, tetragonal ; peta's 

 rather longer than the calyx, i;. B. H. Native from New- 

 Jersey to Carolina, in swamps. Ludwigia pilosa, Walt. car. 89. 

 Ell. sketch. 1. p. 216. Lam. diet. 3. p. 587. Flowers axillary, 

 pedicellate, yellow. 



/ 'ar. ft, permollis (D. C. prod. 3. p. 60.) leaves obtuse ; 

 flowers on short pedicels. I/ . B. H. Ludwigia permollis, Bart, 

 fl. p. 52. 



Hairy Isnardia. PI. 2 feet. 



5 I. MOLLIS (Poir. suppl. 3. p. 188.) stem erect, much 

 branched, villous ; leaves lanceolate-oblong ; flowers rather 

 crowded ; petals small, shorter than the calyx ; capsule globose. 

 I/ . B. H. Native of Carolina ; frequent in bogs. Ludwigia 

 mollis, Michx. fl. bor. amer. 1. p. 90. Ell. sketch. 1. p. 214. 

 Ludwigia rudis, Walt. car. p. 89. Ludwigia hirtella, Rafin. 

 med. rap. 5. p. 356. 



Soft Isnardia. PL 1 to 2 feet. 



6 I. CAPITA'TA (D. C. prod. 3. p. 60.) stem erect, twiggy, 

 glabrous, but the stolons are creeping and pubescent ; leaves 

 alternate, linear-lanceolate, glabrous, acute at the apex and 

 rounded at the base ; heads spicate, terminal ; petals shorter 

 than the calyx ; capsule nearly globose ; calycine lobes short. 

 i; . B. H. Native of Lower Carolina, in swamps. Ludwigia 

 capitata, Michx. fl. bor. amer. 1. p. 90. Ludwigia suffruticosa, 

 Walt. car. p. 90. Petals yellow. Roots creeping. 



Copz'tate-flowered Isnardia. PI. ^ to 1 foot. 



* * Leaves opposite. 



7 I. PEDUNCULOSA (D. C. prod. 3. p. 60.) stems procumbent, 

 rooting, pubescent ; leaves opposite, lanceolate ; pedicels axil- 

 lary, very long ; capsule oblong-clavate ; petals exceeding the 

 calycine lobes, which are lanceolate. If.. B. H. Native of 

 Virginia and Lower Carolina, in swamps near the sea. Lud- 

 wigia pedunculosa, Michx. fl. bor. amer. 1. p. 88. Ell. sketch. 

 1. p. 215. Ludwigia acuata, Walt. fl. car. 86. Petals yellow. 



Stal/ced-fiowered Isnardia. PI. procumbent. 



8 I. RE'PENS (D. C. 1. c.) stems creeping, glabrous; leaves 

 opposite, obovate ; pedicels axillary, shorter than the leaves ; 

 petals ovate, much smaller than the calyx ; capsule oblong, te- 

 tragonal. I/ . B. S. Native of Jamaica, among stones on the 

 banks of rivers. Habit of 7. pahistris. Ludwigia repens, 

 Swartz, fl. ind. occ. 1. p. 273. icon. t. 8. 



Creeping Isnardia. PI. creeping. 



SECT. II. DA'NTIA (see genus for the derivation). D. C. 

 prod. 3. p. 61.' Dantia, Pet. Th. gen. 49. Isnardia, Lin. gen. 

 156. Petals wanting. 



* Leaves opposite. 



9 I. PALU'STEIS (Lin. spec. 175.) stems procumbent, rooting, 

 glabrous ; leaves opposite, ovate, acute ; flowers axillary, soli- 



4 U 



