CONVOLYULACEJE. I. RIVEA. 



253 



8 LEPTOCA'LLIS. Ovarium 4-celled; cells 1 -seeded. Stigma 

 2-lobed, capitate. Corolla with a slender tube, and a spreading 

 limb. 



9 BATA'TAS. Ovarium 4-celled; cells 1 -seeded. Corolla 

 campanulate. Genitals inclosed. 



10 PHARBITIS. Ovarium 3-celled ; cells 3-seeded, 



1 1 CALOSY'CTION. Ovarium 2-celled, or somewhat 4-celled, 

 4-seeded. Corolla funnel-shaped. Genitals exserted. 



12 EXOGOKIUM. Ovarium 2-celled ; cells 2-seeded. Corolla 

 tubular. Genitals exserted. 



13 LEPISTE'MON. Ovarium 2-celled ; cells 2-seeded. Stamens 

 inclosed, with a scale at the base of each. 



14 IPOMX'A. Ovarium 2-celled; cells 2-seeded. Stamens 

 inclosed. Stigma 2-lobed ; lobes capitately globose. 



15 JACQUEMOXTIA. Ovarium 2-celled ; cells 2-seeded. Sta- 

 mens inclosed. Stigma 2-lobed ; lobes complanately ovate. 



16 CONVOLVULUS. Ovarium 2-celled; cells 2-seeded. Sta- 

 mens inclosed. Stigma 2-lobed ; lobes teretely filiform. 



1 7 ANISE'IA. Ovarium 2-celled ; cells 2-seeded. Lobes of 

 stigma capitate. Sepals not verticillately inserted. 



18 POLYME'RIA. Ovarium 2-celled ; cells 1 -seeded ; stigmas 

 4-6, teretely filiform. 



19 CALYSTE'GIA. Ovarium 1 -celled, as also somewhat 2- 

 celled, 4-ovulate.' Lobes of stigma filiform. Bracteas 2, invo- 

 lucrate. 



20 SHCTEREIA. Ovarium 1-celled, 4-ovulate. Stigma 2- 

 lobed ; lobes complanately ovate. 



21 SKINNE'RIA. Ovarium 1-celled, 4-ovulate. Stigma 2- 

 lobed ; lobes capitately globose. 



ix! PORA'XA. Ovarium 1-celled, 2-4-ovulate. Sepals in- 

 creasing unequally after flowering. Stigmas globose. 



23 DUPERRE'YA. Capsule 1-celled, 1-seeded. Stigma large, 

 thick. Calyx propped by 2 small bracteas. 



2. Style bifid, or styles too. 



24 NEUROPE'LTIS. Ovarium 1-celled. Styles 2; stigmas 

 fleshy. Capsule 1-seeded. Bracteas large, surrounding the 

 capsule. 



25 PRBVOSTEA. Ovarium 2-celled. Style 1, bifid. Outer" 

 sepals involving the flower. 



26 BREWE'RIA. Ovarium 2-celled. Style 1, bifid. Sepals 

 nearly equal. Genitals inclosed. 



27 BOXA'MIA. Ovarium 2-celled. Style 1, bifid. Sepals 

 nearly equal. Genitals exserted. 



28 CHE'SSA. Ovarium 2-celled. Styles 2 ; stigmas globose. 

 Stamens exserted. 



29 EVOLVCLCS. Ovarium 2-celled. Styles 2, bifid. 



30 CLADOSTYLES. Capsule 1-celled, 1-seeded. Styles 2, bifid. 



31 WILSOXIA. Ovarium small, 2-seeded. Style 1, bifid. 

 Calyx tubular. 



TRIBE III. 



DICHONDRE.E. Embryo without cotyledons. Carpella dis- 

 tinct. 



32 DICHOKDRA. Ovaria two. 



33 FA'LJUA. Ovaria 4. 



CDSCU'TE.*. 

 34 CUSCC V TA. 



TRIBE IV. 



Embryo acotyledonous. 

 Plants parasitical. 



f A genus doubtful whether it belongs to the present, order. 



35 MOCROUCOA. Calyx 5-parted : the 2 outer segments 

 covering the rest. Corolla funnel-shaped ; limb large, spreading, 

 5-lobed. Stamens inserted in the upper part of the tube, and 

 opposite the lobes. Stigma bilamellate. Capsule girded by the 

 calyx, 3-celled ; cells 1-seeded. 



Tribe I. 



ARGYRE'IEJi (this tribe contains plants agreeing with the 

 genus Argyreia, in having a baccate pericarp.) Choisy, in mem. 

 soc. phys. genev. 6. p. 407. Embryo cotyledonous. Carpels 

 combined into a single ovarium. Pericarp baccate, indehiscent. 



1. RI V VEA (this genus is dedicated by Choisy, to his friend 

 Auguste de la Rive, a physician of Geneva.) Choisy, in mem. 

 soc. phys. gen. 6. p. 407. Convolvulus, Ipomae'a, and Lettsomia. 

 species of authors. 



LIN. SYST. Pentdndria, Monogynia. Sepals 5. Corolla 

 tubular or funnel-shaped, showy, Style 1 ; stigma capitate or 

 lamelliform, 2-lobed. Ovarium 4-celled, 4-ovulate. Capsule 

 baccate. Twining, sufiruticose, very showy plants, the flowers 

 of which exceed in size all other convolvulaceous plants. 



1 R. TILJ^FOLIA (Choisy, 1. c. p. 407.) leaves cordate-round- 

 ish ; peduncles usually 1 -flowered, rarely 2-4-flowered ; sepals 

 ovate-roundish, very blunt, equal ; corolla inflato-cylindrical. 



\} . ^\ S. Native of the East Indies, as of Penang, Travancore, 

 Philippine Islands, banks of the Ganges, &rc; also of the Isle of 

 France, Cape of Good Hope. The same plant is said also to be 

 found in America, as in St. Domingo, St. Vincent, and Peru. 

 Convolvulus tiliaefblius, Desr. in Lam. diet. 3. p. 544. Ipomae'a 

 tiliaefblia, Roem. et Schultes, syst. 4. p. 229. Ipomae'a Gangetica, 

 Sweet, hort. brit. ed. 2d. p. 288. Ipomae'a Benghalensis ?, 

 Roth, ex Roem. et Schultes, syst. 4. p. 229. Convolvulus Gan- 

 geticus, Roxb. fl. ind. 2. p. 46. Convolvulus spectabilis, Brit, 

 mus. Conv. grandifldrus, Brit. mus. Lettsomia microcalyx, 

 Wight. Convolvulus leucantha, and Ipomae'a salicifolia, Herb, 

 madr. Conv. marginatus, Hamilt. herb. Ipomae'a baccifera, 

 Russell, herb. Stem downy or smoothish. Young branches 

 villous. Leaves obtuse or acuminated, downy beneath, while 

 young rather tomentose. Corolla tubular, 2-3 inches long, 

 white. Seeds silky on the angles. Sepals reniform, emargi- 

 nate, increasing in size with the fruit, and covering it at all times, 

 ex Roxb. Lobes of stigma round. 



Tilia-leaced Rivea. Fl. May, Aug. Clt. 1812. Shrub tw. 



2 R. HYPOCRATERIFORMIS (Choisy, I. c. p. 408.) leaves cordate- 

 roundish ; peduncles 1 -flowered, sometimes axillary and solitary, 

 sometimes disposed in a spicate manner at the tops of the 

 branches ; sepals ovate, obtuse, unequal ; limb of corolla salver- 

 shaped : tube very narrow. l> . ^. S. Native of the East 

 Indies, in forests, over the southern parts of the Carnatic and 

 Tanjore country, Trincomala, and Travancore. Conv61vulus 

 hypocrateriformis, Desr. in Lam. diet, 3. p. 561. Conv. can- 

 dicans, Roem. et Schultes, syst. 4. p. 302. but not of Roth. 

 Lettsomia unifldra, Roxb. fl. ind. 2. p. 85. Ipomae'a candicans, 

 Roxb. herb. Argyreia uniflora, Sweet, hort. brit. p. 289. Stem 

 downy or villous. Leaves obtuse, rarely white and villous be- 

 neath. Peduncles villous, furnished with 2 bracteas at or near 



