MELASTOMACE.n. XXVIII. MARCETIA. XXIX. TREMBLEYA. 



71!) 



oval, with revolute margins, nerveless, small, crowded, coria- 

 ceous ; (lowers solitary at the tops of the branches ; calyx oblong, 

 beset with short, glandular hairs. I? . S. Native of Brazil, in 

 the province of Minas Geraes, at the height of 5000 feet. 

 D. C. coll. mem. 1. t. 5. Illu'xia sertularia, Schrank et Mart. 

 mss. Stamens exserted. Petals oval, white in a dried state. 

 Very elegant and very distinct from the other species. 



Sertularia-likc Marcctia. Shrub 1 foot. 



Cult. The species of Marcctia are elegant little shrubs, but 

 probably of difficult cultivation. Should any of them be ever 

 introduced to the gardens, we would recommend thejr being 

 grown in a mixture of loam, peat, and sand, draining the pots well 

 with sherds, and placing them on the shelves in a stove. Young 

 cuttings will perhaps root in sand under a bell-glass, in heat. 



XXIX. TREMBLFYA (dedicated to Abraham Trembley, 

 who by his observations on fresh water polypes, has contributed 

 to determine the limits of the vegetable kingdom). D. C. prod. 

 l>>. p. 125. 



LIN. SYST. Decdndria, Monogynia. Tube of calyx ovate, 

 Constricted at the apex ; lobes 5, rather dilated from the base, 

 awned, or oblong. Petals 5, oval. Stamens 10, 5 of which 

 bear ovate-oblong anthers, with short blunt beaks ; having their 

 connectives drawn out into an obcordate or spatulate simple 

 ligula each ; the 5 alternate ones having the ligula hardly evident. 

 Stigma dot-formed. Capsule ovate, 5-celled, glabrous. Seeds 

 cochleate? Shrubs, native of Brazil. Leaves sessile or petiolate, 

 oblong or linear, quite entire, 1-3-nerved. Pedicels axillary 

 or terminal, 1-3-rlowered. This genus agrees with Rlicxia in 

 the urceolate calyx, but differs in the corolla being pentapetalous. 

 The habits of the species are heterogeneous, but the characters 

 are not so. The genus is therefore divided into 3 sections. 



SECT. I. JACOBIA (dedicated to James Andr. Trembley, who 

 wrote a thesis on vegetation, which has been falsely attributed 

 to Calandrini, a Swiss botanist). D. C. prod. 3. p. 125. 

 Calyx turbinate, hardly constricted at the apex ; lobes subulate. 

 Petals oval, mucronate. Connectives of anthers drawn out into 

 a short appendage each. Flower solitary, yellow. This section 

 almost agrees with the genus Marcetia, but differs in the petals 

 being yellow. Perhaps a proper genus. Seeds unknown. 



1 T. ROSMARINOIDES (D. C. prod. 3. p. 125.) shrubby, much 

 branched, glabrous ; branches tetragonal ; leaves on short pe- 

 tioles, linear, quite entire, 1 -nerved, besides 2 marginal veins, which 

 are joined with the reticulating veins, clothed with yellowish down 

 beneath ; flowers axillary, solitary, pedicellate, and at the tops 

 of the branches ; tube of calyx ovate, somewhat costate, equal 

 in length to the lobes, which are subulate, and 5-G in number ; 

 anthers dissimilar. Tj . S. Native of Brazil, in the province 

 of Minas Geraes, on the tops of mountains, at the elevation of 

 5000 feet. Rhexia rosmarinoides, Schrank et Mart. mss. 

 Petals obovate, yellow. Anthers ovate, with short blunt beaks ; 

 the alternate ones furnished with a longer auricled connective 

 each. 



Rosemary-like Trembleya. Shrub 1 foot. 



SECT. II. ABRAHA'MIA (in honour of Abraham Trembley, 

 see genus). D. C. prod. 3. p. 126. Calyx urceolate ; lobes 

 subulate or linear. Petals not gradually mucronated but api- 

 culated. Connectives of anthers drawn out into a broad append- 

 age each. Flowers purplish, pedicellate. 



2 T. PHLOGIFORMIS (U. C. 1. c.) plant suffruticose, oppositely 

 branched ; branches somewhat tetragonal, beset with glandular 

 hairs ; leaves sessile, elliptic-oblong, attenuated at both ends, 

 ciliately serrated, 3-nerved, hispid on both surfaces ; pedicels 

 1 -flowered, axillary, and at the tops of the branches ; calyx 

 rather hispid, with an urceolate tube, and a limb which is campa- 



milate at the base and 5-lobed at the apex, the lobes ending 

 in setaceous points, hardly shorter than the tube ; anthers dis- 

 similar. 17.8. Native of Brazil, in the province of St. Paul, 

 in fields. Rhexia phlogiformis, Mart, et Schrank, mss. Petals 

 oval-oblong, purple. Anthers 10, ovate, with short blunt beaks ; 

 the 5 longer ones having their connectives drawn out into abroad 

 obcordate appendage each, and those of the 5 shorter ones drawn 

 out into a small narrow appendage each. Capsule ovate, 5 ?- 

 celled. 



PItlox-leavcd Trembleya. Shrub 1 to 2 feet. 



3 T. AGRE'STIS (D. C. I.e.) shrubby ; branches bluntly tetra- 

 gonal ; leaves elliptic-oblong, cuneated at the base, rather 

 acutish, quite entire, 3-nerved, pruinose on both surfaces as 

 well as the branchlets ; upper ones pilose as well as the 

 calyxes ; flowers solitary, terminal ; lobes of calyx 5, oblong, 

 a little longer than the tube ; petals obovate, cuneated. J? . S. 

 Native of Brazil, in the province of Minas Geraes, in elevated 

 stony fields. Rhexia agrestis, Mart, and Schrank, mss. Leaves 

 7-9 lines long and 3 lines broad. Flowers small. Anthers 

 oval-oblong, ending in very short beaks, but having their con- 

 nectives drawn out into a long, club-shaped process each at the 

 articulation ; inner anthers furnished with shorter connectives. 

 The rest unknown. 



Field Trembleya. Shrub 1 to 2 feet. 



4 T. IIETEROSTE'MON (D. C. 1. c.) shrubby ; branches bluntly 

 tetragonal, when young clothed with velvety villi ; leaves petio- 

 late, lanceolate, cuneated at the base, obtuse at the apex, quite 

 entire, 3-nerved, clothed with velvety tomentum beneath, 

 smoothish above ; cymes 5-7-flovvered, axillary, 3-thnes shorter 

 than the leaves ; calyx turbinately globose, with 5 short teeth ; 

 anthers 10, dissimilar. Jj . S. Native of Brazil, in the pro- 

 vince of Minas Geraes, near subalpine fountains. Rhexia he- 

 terostemon, Mart, et Schrank, mss. Leaves 2 inches long, and 

 5 lines broad. Petals oblong, white. Anthers ovate, short, 

 ending in short beaks, 5 of which are spurless, and the other 5 

 having their connectives drawn out at the base into an obcor- 

 date appendage each, which is about equal in length to the 

 anther. 



Varialtle-stamened Trembleya. Shrub. 



5 T. TRIFLORA (D. C. 1. c.) shrubby ; branches tetragonal, 

 glabrous ; leaves petiolate, oblong-lanceolate, quite entire, 3- 

 nerved, glabrous above, but white beneath from very minute 

 down ; peduncles axillary, 3-flowered, angular ; calyx turbinate, 

 glabrous, with 5 triangular short lobes; anthers dissimilar. 



fj . S. Native of Brazil, in the province of Minas Geraes, in 

 woods near Villa Ricca. Rhexia triflora, Mart, et Schrank, 

 mss. Petals obovate, oblong, 3-4 lines long, not ciliated. An- 

 thers 10, ovate, ending in short beaks, 5 of which have their 

 connectives drawn out into a yellow retuse appendage each. 

 Three-flowered Trembleya. Shrub 2 feet. 



SECT. III. ERIOLEU'CA (from tpiov, erion, wool, and 

 leiicos, white ; plant clothed with white tomentum in every part). 

 D. C. prod. 3. p. 126. Calyx hardly constricted at the apex, 

 woolly on the outside ; lobes oblong. Petals obtuse. Connec- 

 tives of the longer anthers drawn out each into a broad appen- 

 dage. Flowers axillary, sessile. Seeds unknown. Perhaps a 

 proper genus. 



6 T. LYCHNITIS (D. C. 1. c.) shrubby, clothed in every part with 

 white woolly tomentum, except the petals, genitals, and the upper 

 surface of the adult leaves ; branches terete ; leaves almost ses- 

 sile, ovate, or somewhat oblong, 3-nerved, quite entire ; flowers 

 axillary, sessile, somewhat verticillate ; tube of calyx turbinate, 

 equal in length to the lobes, which are 5, oblong, and glabrous 

 inside ; anthers dissimilar. Tj . S. Native of Brazil, in the 

 province of Minas Geraes, in exposed stony places on the sides 

 of mountains. Rhexia lychnitis, Schrank et Mart. mss. Me- 



