696 



ONAGRARI^E. X. JUSSUJA. XI. PRIEUREA. XII. LUDWIGIA. 



leaves lanceolate ; flowers large, sessile, yellow, decandrous. 

 fj . B. S. Native about Campeachy. 

 Hairy Jussiaea. Sh. 3 ft. 



65 J. PUBE'SCENS (Lin. spec. 555.) erect, villous ; flowers ses- 

 sile, decandrous, pentapetalous. Native of Soutli America. 



Pubescent Jussiaea. PI. 2 ft. 



66 J. TENE'LLA (Burm. fl. ind. p. 103. t. 35. f. 5.) glabrous ; 

 leaves opposite, linear-lanceolate ; flowers pedicellate, decan- 

 drous, pentapetalous. Native of Java. 



Weak Jussia:a. PI. 1 ft. 



Cult. All the species of this genus are either water or bog 

 plants, and therefore require to be kept moist. The species, 

 natives of bogs, may be grown in pots, under which may be 

 placed pans of water. The floating aquatic kinds should be 

 grown in tubs, filled with water, with a layer of mould in the 

 bottom, in which the plants may root. All the species, natives 

 of warm climates, require a great degree of heat to bring them 

 to flower. The </. grandiflbra is the only hardy aquatic kind ; 

 it grows best when planted in a shallow pond or rivulet. 



XI. PRIElTREA (this genus is dedicated to M. Le Prieur, 

 the discoverer of the plant at Senegal). D. C. prod. 3. p. 58. 



LIN. SYST. Tridndria, Monogynia- Tube of calyx cylin- 

 drical, elongated, adhering to the ovarium ; limb 3-parted ; 

 segments lanceolate, acute, permanent. Petals 3, small. Sta- 

 mens 3, alternating with the lobes of the calyx ; filaments fili- 

 form, short. Style short. Seeds small. Herb glabrous, dwarf, 

 branched, of an obscure green colour. Leaves alternate, oblong- 

 linear, acute, entire. Flowers axillary, solitary, on very short 

 pedicels. 



1 P. SENEGALE'NSIS (D. C. I.e.). Native of Senegal, in bogs. 

 Habit almost of Jussicea ranmlosa. 



Senegal Prieurea. PI. dwarf. 



Cult. For culture and propagation see Jussive a. 



XII. LUDWI'GIA (so named by Linnaeus in honour of 

 Christian Gottlieb Ludwig, once Professor of Medicine at Leip- 

 sic, author of Definitiones Plantarum, 1 vol. 8vo. Leipsic, 

 1737, and numerous other botanical works). Roxb. fl. ind. 1. 

 p. 440. D. C. prod, 3. p. 58. Ludwigia species of Lin. and 

 others. 



LIN. SYST. Tetrandria, Monogynia. Tube of calyx cylin- 

 drical, adherinti; to the ovarium ; limb 4-parted, the lobes almost 

 permanent. Petals 4, alternating with the lobes of the calyx. 

 Stamens 4, opposite the lobes of the calyx. Apex of ovarium 

 or base of style pyramidal, tetragonal, 4-furrowed, glabrous 

 in the furrows, and villous on the angles ; the stamens lying in 

 the furrows. Style filiform, pyramidal from the apex. Stigma 

 capitate, 4-furrowed, or 4-lobed. Capsule turbinate, or very 

 much elongated, 4-celled, 4-valved, crowned by a cone-formed 

 pyramid. Seeds numerous. Branched Indian herbs. Leaves 

 alternate, linear, on very short petioles, quite entire. Flowers 

 axillary, almost sessile, yellow, furnished with two bractcoles at 

 the base of the calyx. This genus is intermediate between 

 Jussicea and Isnardia ; from the former, it is distinguished in 

 the stamens being equal in number to the petals, not double that 

 number ; from the latter, in the capsule being elongated and 

 ending in a cone-formed pyramid at the base of the style. The 

 genus Lvdmigia of Linnaeus is the same as Isnardia. 



1 L. JUSSI/EOIDES (Lam. diet. 3. p. 588. but not of Michx.) 

 erect, glabrous ; leaves lanceolate-linear, acuminated at both 

 ends ; flowers pedicellate, almost bractless ; capsule elongated, 

 nearly terete. Native of the Mauritius and the East Indies. 

 Stems terete, branched. Branches and leaves puberulous, when 



examined under a lens. Flower-bud ovate, acuminated. Cap- 

 sule an inch long, but hardly a line in breadth. Perhaps the 

 same as L. alternifolia of Burm. exclusive of the synonymes. 

 Jussicea-like Ludwigia. PI. 1 foot. 



2 L. FRUTICOSA (Blume, bijdr. p. 1133.) stem erect, glabrous, 

 shrubby, pentagonal ; leaves lanceolate, bluntly acuminated, 

 with finely ciliated margins ; flowers twin or crowded, axillary, 

 sessile; capsule linear, tetragonal. f?.B. S. Native of Java, 

 near rivers and rivulets. There is a variety with narrow leaves. 

 Allied to L. Jussiceoides. 



Shrubby Ludwigia. Shrub 1 foot ? 



3 L. LEUCORHI'ZA (Blume, 1. c.) stem erect, glabrous, herba- 

 ceous, pentagonal ; leaves alternate, linear-lanceolate, bluntish, 

 with the margins finely ciliated ; flowers at first capitate, but at 

 length axillary, solitary, and sessile ; capsule elongated, clavate, 

 tetragonal. Native of Java, about Buitenzorg at the river 

 Tjelinong. Root white, fusiform. Allied to L. fruticosa. 



White-rooted Ludwigia. PI. |- foot. 



4 L. LYTHROIDES (Blum, bijdr. 1134.) stems erect, glabrous, 

 pentagonal ; leaves linear, bluntish ; flowers pedicellate, fur- 

 nished with 2 bracteas at the top of the pedicels ; capsule tetra- 

 gonal, rather turbinate, short Native of the East Indies. 

 Branches angular. Leaves oblong-linear, acute at the base. 

 Bracteas one half shorter than the capsule. Pyramid of ovarium 

 depressed at the base of the style. Stigma large, 4-lobed. 



Lythrum-like Ludwigia. PI. ^ foot. 



5 L. ERIGA'TA (Lin. mant. p. 40.) stem erect, smooth ; leaves 

 alternate, lanceolate ; pedicels usually tern, 1 -flowered; capsule 

 subcubical, 4-angled ; petals small. Q. W. II. Native of the 

 East Indies. L. triflora, Lam. diet. 3. p. 613. L. alternifolia, 

 Burm. fl. ind. p. 36. exclusive of the synonymes. There arc- 

 two plants in Burmann's herbarium under this name, one refer- 

 rible to L. Jussiceoides and the other L. erigata. 



Erigated Ludwigia. PI. 1 foot. 



6 L. PARVIFLORA (Roxb. fl. ind. 1. p. 440.) diffuse, glabrous ; 

 flowers sessile or on short pedicels, bibracteolate at the base ; 

 capsule linear, somewhat tetragonal. Q. B. H. Native of Bengal. 

 Plant small, branched. Petals oblong, length of the calycine 

 lobes. Bracteoles small. 



Small-flowered Ludwigia. Fl. July, Aug. Clt. 182.5. PI. 

 i foot. 



7 L. DIFFU'SA (Hamilt. in Lin. trans. 14. p. 301.) diffuse, 

 glabrous ; leaves lanceolate ; flowers almost sessile ; capsule 

 prismatic, tetragonal; angles blunt; pedimcles one half shorter 

 than the leaves. W. H. Native of the East Indies, in water. 

 Rheed. mal. 2. t. 40. Jussiae'a caryophyllai'a, var. a. Lam. 

 diet. 3. p. 331. 



Diffuse Ludwigia. PI. diffuse. 



8 L. PROSTRA^TA (Roxb. fl. ind. 1. p. 440.) lower branches 

 prostrate and rooting ; flowers sessile, solitary, or numerous in 

 the axils of the leaves ; capsules filiform ; seeds disposed in 

 one series in each cell. Q. H. Native of Pegu. 



Prostrate Ludwigia. Fl. Jul. Aug. Clt. 1816. PI. 1 to 2 ft. 



) Sjiecies hardly known. 



9 L. PERE'NNIS (Lin. spec. ed. 2. p. 173.) flowers pedicellate ; 

 capsule cylindrical ; stems diffuse ; leaves lanceolate. I/ . W. S. 

 Native of the East Indies, and Ceylon. Ludwigia, Lin. fl. zeyl. 

 no. 66. Ludw. oppositifolia, Lin. syst. veg. p. 135. This species 

 is hardly known, as Linnaeus, in his spec. pi. says the leaves are 

 opposite, and in his fl. zeyl. alternate, and cites the figure in 

 Rheed. mal. 2. t. 49. for his plant, and at the same time excludes 

 it from his mant. 



Perennial Ludwigia. PI. prostrate. 



10 L. TRIFLORA (Burm. fl. ind. p. 37.) erect, herbaceous, 



