CONVOLVULACRfi. XXV. PREVOSTEA. XXVI. BREWERIA. 



299 



mate, acute at both ends, petiolate, coriaceous ; racemes axil- 

 lary, erect ; bractea roundish, surrounding the capsule. T? . S. 

 Native of Penang, where it was collected by W. Jack. Young 

 branches downy Leaves numerous, 3-4 inches long, downy be- 

 neath. Racemes 4 or more from the same axil, 1-3 inches long. 



Racemose-fiovtered Neuropeltis. Shrub. 



2 N. OVA'TA (Wall. cat. no. 1323. Choisy, 1. c. p. 492.) 

 woody ; stem white, rugose, beset with white dots ; leaves ob- 

 long-lanceolate, with revolute edges, but not coriaceous ; bractea 

 ovate, surrounding the capsule, which is about the size of the 

 fruit of Tllia. Jj . S. Native of the Burmann Empire, at 

 Amherst. Leaves 3-4 inches long, glabrous on both surfaces. 

 Racemes shorter than the leaves. This species is very nearly 

 allied to the first ; but differs, in the leaves being oblong-lan- 

 ceolate, not ovate, coriaceous ; in the bractea surrounding the 

 fruit being ovate, not roundish, and in the capsule being larger. 



Ocate-bractead Neuropeltis. Shrub. 



Cult. For culture and propagation see Bonamia, p. 299. 



XXV. PREVO'STEA (named after M. Prevost, of Geneva.) 

 Choisy, in mem. soc. phys. gen. 6. p. 492. Calycabolos, Willd. 

 Dufourea, H. B. et Kunth, nov. gen. amer. 3. p. 113. 

 Dethardingia, Nees, et Mart, in nov. act. bonn. 11. p. 79. 

 Reinwardtia, Spreng. syst. l.p. 598. 



LIN. SYST. Pentdndria, Digynia. Calyx of 5 sepals, the 2 

 outer ones large, and involving the flower. Corolla funnel- 

 shaped, with a plicate limb. Ovarium 2-celled ; cells 2-seeded. 

 Styles 2, or style one, deeply bipartite; stigmas capitate. Cap- 

 sule 2-celled ; cells 1-2-seeded. Twining shrubs, natives of 

 South America. Leaves entire. Peduncles many-flowered, 

 axillary and terminal, panicled. Corollas white. 



1 P. GLA'BRA; leaves glabrous; peduncles axillary, many- 

 flowered ; outer sepals green. Ij . / ~ k . S. Native of the Mis- 

 sions of the Orinoco, on the banks of the Cassiquares, near San 

 Francisco Solano. Dufourea glabra, H. B. et Kunth, nov. gen. 

 3. p. 114. Reinwardtia glabra, Spreng. syst. 1. p. 863. 

 Shrub much branched ; branches terete. Leaves obovate, ob- 

 tuse, mucronate, cordate at the base, 2g inches long, full of 

 pellucid dots. Corollas white. 



Glabrous Prevostea. Shrub twining. 



2 P. SERICEA ; leaves silky beneath ; panicles terminal ; outer 

 sepals coloured. ';'"'. S. Native of New Granada, near the 

 town of Mariquita, at the altitude of 400 hexapods. Dufourea 

 sericea, H. B. et Kunth, nov. gen. 3. p. 114. t. 214. Rein- 

 wardtia sericea, Spreng. 1. c. Young branches clothed with 

 silky down. Leaves ovate-elliptic, obtuse, mucronate, cordate 

 at the base, glabrous above, but clothed with yellowish, silky 

 down beneath, 3-4 inches long, and 2 broad, dotted. Corollas 

 white. 



Silky Prevostea. Shrub tw. 



3 P. HETERA'KTHA ; villous ; leaves cordate-ovate, acute, 

 rather angular ; peduncles 3-flowered, about equal in length to 

 the leaves ; sepals unequal, 3 outer ones larger, green. ^ . ^\ 

 S. Native of Brazil. Dufourea heterantha, Mart, in nov. act. 

 bonn. 11. p. 79. Convolvulus Martii, Spreng. syst. 1. p. 598. 

 Corolla blue. Style undivided. Perhaps Ipomoe'a Weinmanni, 

 Roem. et Schultes, is a species of Prevostea. 



Variable-flonered Prevostea. Shrub twining. 



Cult. For culture and propagation see Parana, p. 298. 



XXVI. BREWE'RIA (named in memory of Samuel Brewer, 

 who is much praised by Dillenius, in his Historia Muscorum.) 

 R. Br. prod. 487. Choisy, in mem. soc. phys. gen. 6. p. 487. 



Lix. SYST. Pentdndria, Digynia. Calyx" of 5 equal sepals. 

 Corolla funnel-shaped, or campanulate, plicate. Style one, bifid ; 

 stigmas 2, capitate. Capsule 2-celled, valvate ; girded by the 



calyx, which is scarcely changed; cells 2-seeded. Diffuse, non- 

 lactescent herbs. Leaves entire. Flowers axillary, nearly 

 solitary. This genus is intermediate between Ipomcea and 

 Erohulus. It differs from Parana chiefly in the calyx not 

 being changed in the fruit-bearing state, and in habit. It differs 

 also from Bonamia, by the same reason. 



1 . Leaves cordate at the base. 



1 B. ROXBD'RGHII (Choisy, in mem. soc. phys. gen. 6. p. 493.) 

 stem branched ; branches rusty ; leaves ovate-cordate, sub-acu- 

 minated, rusty ; peduncles hardly equal in length to the petioles, 

 3-many-flowered ; sepals ovate, acuminated or ovate-roundish, 

 nearly equal. T? . S. Native of the East Indies, as of Silhet, 

 Penang, Amherst, Tavoy, Travancore, Courtall, Shreenugur, &c. 

 Conv61vulus semidigynus, Roxb. in Wall. fl. ind. 2. p. 47. 

 Conv. ferrugineus, Herb. madr. Leaves 2-3 inches long, and 

 lg broad. Peduncles and petioles downy. Outer sepals villous. 

 Corollas villous, rufescent. Capsule glabrous, crowned by a 

 tuft of hairs. Seeds black, angular, glabrous. 



Roxburgh's Breweria. Shrub diffuse. 



2 B. CORDA'TA (Blum, bijdr. p. 722.) plant tomentose ; leaves 

 cordate, acuminated, villous ; peduncles umbellately 3-5- 

 flowered at the apex ; sepals acuminated, the 2 outer ones the 

 largest, ty.S. Native of Java, about Buitenzorg. Nearly 

 allied to B. pannosa. Styles unequal. 



Cordate-leaved Breweria. PI. diffuse ? 



3 B. pANN6sA (R. Br. prod. p. 488.) tomentose ; leaves ovate, 

 sub-cordate, pannosely tomentose ; sepals unequal : outer ones 

 ovate, somewhat acuminated ; styles unequal, combined at bot- 

 tom. 11 . S. Native of New Holland, within the tropic. 



C7ofA-leaved Breweria. PL diffuse. 



4 B. ME'DIA (R. Br. 1. c.) plant rather villous; leaves lanceo- 

 late, obtuse at the base, and somewhat cordate ; styles unequal, 

 combined at the base. 11 . S. Native of New Holland, within 

 the tropic. 



Intermediate Breweria. PI. diffuse. 



5 B. MADAGASCARIE'NSIS (Choisy, in mem. soc. phys. gen. 6. 

 p. 493.) Native of Madagascar. Nothing more is known of 

 this species to us, but the name. 



Madagascar Breweria. PI. diffuse. 



2. Leaves ovate or linear, entire. 



6 B. E'LEOANS (Choisy, 1. c. p. 494.) stem branched, elon- 

 gated ; older leaves ovate-elliptic, obtuse, emarginate : younger 

 ones narrower, almost linear ; peduncles 1-3-flowered, straight, 

 generally exceeding the younger leaves ; sepals cuneate-lanceo- 

 late, very acute ; corolla showy, carnpanulately funnel-shaped, 

 11 . S. Native of the Burman Empire, at Prome. Conv. ele- 

 gans, Wall. cat. no. 1392. Stems smoothish or downy. Leaves 

 near 2 inches long, and hardly an inch broad, smoothish and 

 green above, but clothed with rusty down, particularly on the 

 veins beneath. Peduncles, pedicels, and bracteas downy. Co- 

 rolla 1 J inch long, downy on the tube outside. 



Elegant Breweria. PI. diffuse. 



7 B. LINEA'RIS (R. Br. prod. 488.) plant villous ; leaves lan- 

 ceolate-linear, complicate ; styles equal, combined at the base. 

 %.. S. Native of New Holland, within the tropic. 



Zinear-leaved Breweria. PI. diffuse. 



8 B. LISIFOLIA (Spreng. syst. 1. p. 614.) leaves scattered, 

 linear, smoothish ; stem scabrous, simple ; peduncles corym- 

 bose, y.. S. Native of Monte Video, Sello. 



Flax-leaved Breweria. PL erect. 



9 B. EVOLVTJLOIDES (Choisy, 1. c.) stem suffruticose, branched; 

 leaves ovate-lanceolate, sessile, small, glabrous ; flowers solitary, 

 axillary, on short peduncles ; corolla small, fj . S. Native of 

 India ? Root woody, yellow. Stems quite glabrous. Leaves 



a q2 



