766 



MELASTOMACE/E. XLV. ROUSSEAUXIA. XLVI. LEANDRA. 



Unequal-sided-\enveA Centradenia. PI. 1 to 1^ foot. 



Cult. The seeds of this plant require to be sown in a hot- 

 bed ; and when the plant have attained the height of 2 or 3 

 inches, they inay be potted off into separate pots, and again re- 

 turned to the hot-bed ; and when they begin to come into flower, 

 they may be removed to the stove. 



Tribe IV. 



MICONIE'^E (this tribe contains plants agreeing with Mico- 

 nia in important characters). D. C. prod. 3. p. 152. Anthers 

 opening by 1 or 2 pores at the apex. Ovarium adnate to the 

 calyx. Fruit baccate. Seeds not cochleate. 



XLV. ROUSSEAU'XIA (dedicated by De Candolle to 

 Desrousseaux, coadjutor with Lamarck in his Dictionnaire de 

 Botanique.) D. C. prod. 3. p. 152. 



LIN. SYST. Octandria, Monogynia. Tube of calyx hemis- 

 pherical, smooth : lobes 4, broad. Petals 4, obovate. Stamens 8 ; 

 anthers oblong-linear, opening by 1 pore ? sometimes all fertile, 

 with their connectives rather gi'obous at the base ; sometimes the 

 alternate ones are sterile, having their connectives short : and 

 the others fertile, with long connectives, which are furnished 

 with 2 bristles at the base. Ovarium adnate to the calyx, bear- 

 ing 4 bristle-like scales at the base around the origin of the 

 style. Style filiform. Capsule baccate, opening at the apex. 

 Seeds angular, shining. Shrubs, natives of Madagascar. Leaves 

 petiolate, 3-nerved, quite entire, oval-oblong. Cymes trichoto- 

 mous, terminal. 



1. Stamens equal, all fertile, each furnished with a short 

 connective. 



1 R. CHRYSOPHY'LLA (D. C. prod. 3. p. 153.) young branches 

 bluntly tetragonal, at length glabrous, rather bristly at the apex ; 

 leaves petiolate, oval-oblong, acute, 3-nerved, glabrous on both 

 surfaces, beset with adpressed setas on the nerves beneath, and 

 on the margins, which are entire ; cymes terminal, twice trifid ; 

 tube of calyx campanulate, quite smooth : with 4 broad-lanceo- 

 late lobes, which are ciliated with bristles. Tj . S. Native of 

 Madagascar. Melastoma chrysophylla, Desr. in Lam. diet. 4. 

 p. 50. but not of Rich. Leaves yellowish when dried. Petals 

 5, obovate. Flower-bud conical, acute. Stamens 8, equal ; 

 filaments glabrous. Anthers oblong-linear, bluntish. Ovarium 

 crowned by 4 spiny-ciliated scales. Style filiform, rising between 

 the scales. Fruit unknown. 



Golden-leaved Rousseauxia. Shrub. 



2. Stamens alternately unequal ; fertile ones furnished each 

 with a long connective, n'hich ends in 2 bristles, 



2 R. ARTICULA'TA (D. C. 1. c.) branches bluntly tetragonal, 

 at length terete, knotted at the insertion of the leaves, roughish 

 from rather adpressed scattered bristles ; leaves petiolate, oval- 

 oblong, acuminated, quite entire, 3-nerved, glabrous above, 

 bristly beneath, but especially on the nerves ; cymes trichoto- 

 inous ; t.ibe of calyx hemispherical, glabrous, with 4 broad ob- 

 tuse lobes; ovarium bristly at the apex. Tj . S. Native of 

 Madagascar, ex herb. Juss. not of Cayenne, as mentioned by 

 Desrousseaux. Melastoma articulata, Desr. in Lam. diet. 4. p. 

 56. Capsule adnate to the calyx, opening at the apex. Seeds 

 angular, shining. Style filiform. Filaments glabrous, filiform. 

 Anthers linear, opening by one pore, rather shorter than their 

 connectives. 



drticulated-stamened Rousseauxia. Shrub. 



Cult. See Melastoma for culture and propagation, p. 764. 



XLVI. LEA'NDRA (in honour of Leandro do Sacramento, 

 director of the botanic garden at Rio Janeiro, author of Nova 

 Plantarum Geneva, inserted in Act. Acad. Monach. vol. 7. 

 Raddi in mem. soc. ital. 1820. p. 6. D. C. prod. 3, p. 153.) 



LIN. SYST. Octo-Decdndria, Monogynia. Tube of calyx 

 ovate, urceolate, almost bottle-shaped, drawn out beyond the ova- 

 rium ; lobes disposed in two rows, with 4-6 outer subulate ones, 

 and 6 inner oval membranous ones, in front of the outer ones. 

 Petals 4-6, linear-lanceolate. Stamens 8-12. Anthers linear, 

 hardly auricledat the base. Style filiform, exserted, hairy at the 

 base. Stigma dot-formed. Berry dry, 3-4-celled. Seeds an- 

 gular, somewhat ovate and shining, with a linear hylum. Bra- 

 zilian shrubs, more or less rough from villi or setae. Leaves 

 triple-nerved, ciliately-serrated. Flowers capitate, usually brac- 

 teate. 



SECT. I. LEANDRA'RIA (an alteration from the generic name). 

 D. C. prod. 3. p. 153. Calyx 5-6-cleft ; lobes disposed in two 

 series. Hairs of the calyx and bracteas bristly. 



1 L. AMPLEXICAU'LIS (D. C. 1. c.) branches tetragonal, rough 

 from bristles, as well as both surfaces of the leaves and margins ; 

 leaves oval-oblong, acuminated, triple-nerved, quite entire, ses- 

 sile, cordate and stem-clasping at the base; heads of flowers 

 bracteate ; bracteas obtuse or emarginate. fj . S. Native of 

 Brazil, at the river Xipote. L. hispida, Schrank et Mart. mss. 

 Calyx almost bottle-shaped, rough from short bristles ; lobes 

 double, 6 outer ones subulate and thick, and the 6 inner ones 

 oval and rather membranous. Seeds angular, shining, with a 

 linear hylum. Stamens not seen. 



Stem-clasping-leaved Leandra. Sh. 2 to 3 feet. 



2 L. PAULINA (D. C. 1. c.) branches terete, thickly beset 

 with rufous villi ; leaves on very short petioles, broadly ovate, 

 bluntly cordate at the base, acute at the apex, somewhat denti- 

 culately serrated, quintuple-nerved, very villous on both surfaces ; 

 heads of flowers dense, hairy, almost sessile along the short rachis ; 

 calyx very villous ; inner lobes of calyx linear and glabrous, 

 outer ones lanceolate and villous on the outside. Jj . S. Native 

 of Brazil, in woods on the mountains between Rio Janeiro and 

 St. Paul. Melastoma Paulinum, Schrank et Mart. mss. Upper 

 leaves hispid from hairs, which are somewhat bulbous at the 

 base, but clothed with villous tomentum beneath. Bracteas very 

 villous on the outside, and smooth inside. 



St. Paul Leandra. Sh. 2 to 3 feet. 



3 L. UMBELLA'TA (D. C. 1. c.) branches terete, and are, as 

 well as the petioles, densely clothed with velvety down ; leaves 

 petiolate, ovate, acuminated, serrately ciliated, 7-nerved, clothed 

 with velvety down on both surfaces ; flowers in dense umbellate 

 heads ; bracteas oblong ; calyx beset with glandular hairs, 6- 

 lobed, bearing 6 appendages on the outside similar to the lobes. 



fj . S. Native of Brazil, in woods, in the low lands in the pro- 

 vince of Minas Geraes. Melastoma umbellatum, Schrank et 

 Mart. mss. Petioles 14 lines long. Leaves 2-3 inches long, 

 Peduncles and calyx thickly beset with capitate hairs. Lobes of 

 calyx length of the tube. Petals linear, acute. Anthers linear, 

 falcate. Connectives short. Genitals exserted. 

 Umbellate-fio\\ereA Leandra. Sh. 2 to 3 feet. 



4 L. INVOLUCRATA (D. C. prod. 3. p. 154.) branches terete, 

 and are, as well as the petioles, densely clothed with short velvety 

 down ; leaves petiolate, ovate, acuminated, serrately ciliated, 7- 

 nerved, clothed with velvety down on both surfaces ; flowers in 

 dense heads ; bracteas ovate ; heads disposed in a terminal pa- 

 nicle, like those of the preceding species ; calyx covered with 

 glandular hairs, appendiculated with 5 lobes on the outside of 

 the inner ones. f? . S. Native of Brazil, in woods. Melas- 

 toma involucratum, Schrank et Mart. mss. Perhaps the same 

 as L. umbellata, but the bracteas are broader at the apex ; tube 

 of calyx a little longer, lobes shorter, petals narrower, and the 

 style is hairy at the base. 



Involucrated Leandra. Sh. 2 to 3 feet. 



5 L. SERI'CEA (D. C. 1. c.) branches terete, and are, as well as 



