756 



MELASTOMACEiE. XXXIII. Arthrostemma. 



terminated by a bristle each). D. C. prod. 3. p. 135. Petals 4, 

 oval, each terminated by a bristle. Anthers 8, equal, having 

 their connectives not appendiculated. Ovarium 4-toothed at 

 the apex. Capsule 4-celled. Seeds renifoi-m, not truly coch- 

 leate. — Herbs, sufFruticose at the base. Flowers white or yel- 

 low. Perhaps this section is sufficient to form a proper genus. 



• (D - - 



awned. Style thickened at the apex. Capsule globose. This 

 plant appears to be intermediate between the first and the pre- 

 sent section. 



Campanulate'&owereil Arthrostemma. Sh. 4 feet. 



Sect. III. Ladanopsis (from XaSavov^ ladanon, the ladanum 

 bush, and oyptgj opsis, resemblance ; plants with the habit of 



ceolate, S-nerved, quite entire, pilose on both surfaces; flowers Cistus ladanifera or ladanum-tree). D. C. prod. 3. p. 136, 



Calyx 4-cleft. Petals 4, obovate, expanded. Connectives of 



anthers rather long, furnished with two short auricles at the 



Flowers base of each. Capsule 4-celled, bristly at the apex. Seeds 



terminal, almost solitary ; calyx clothed with stellate down. "2/ 

 S. Native on the banks of the Orinoco, near Angustura. 



Rhexia Angusturensis, Bonpl. rhex. p. 77. t. 29. 



white. Genitals hardly longer than the petals. Anthers linear, 

 falcate. 



Anguslura Arthrostemma. PI. 2 to 3 feet. 



cochleate. — Herbs or subshrubs. 



7 A. LADANOiDES (D. C. 1. c) plant herbaceous, erect; hairs 

 or stritrae on the stems and leaves adpressed, but those on the 



2 A. piLosELLOiDES (D. C. prod. 3. p. 136.) sv\ffruticose at calyx are spreading, and in fascicles; stem tetragonal; leaves 

 the base ; leaves crowded at the roots, lanceolate, quite entire, on short petioles, lanceolate, acuminated, ovate at the base, S- 

 7-nerved, pilose; stem almost a scape, loosely panicled, few- nerved, serrulated; pedicels elongated, loose, axillary, 1-flow- 



flowered ; calyx pilose. Tj 



Native of New Granada, in 



cold pi 



at the elevation of 3900 feet. Rhexia piloselloides, 



Bonpl. rhex. p. 12. t. 5. Flowers yellow, spreading. Style 

 short, rather clavate. 



Mouse- ear 'like Arthrostemma. 



PI. 4 to 4 foot. 



S 



- Sect. II. 



1^9 



hrachysy short, and 



ered, and terminal 3-flowered ; tube of calyx ovate, longer than 



the lobes, which are oblong and ciliated. ©. S. Native of 



Brazil and Guiana, in marshes. Rhexia hispida. Rich, in act. 



soc. hist. nat. par. 1791. p. 108. Rhexia ladanoides, Rich, in 



Bonpl. rhex. t. 27. Rhexia tida. Mart. herb. Melastoma tricho- 



tomum, Willd. ined. exherb. mus. par. Anthers oval, truncate, 



short, rather dissimilar, especially 4, having short connectives, 



Seedcoch- 



and 4 with longer ones, 

 leate. Flowers purplish. 



Ovarium bristly, 4-celled. 



Ladanum-like Arthrostemma. PL 1 to l|^foot. 



8 A. herbVceum (D.C. prod. 3. p. 137.) herbaceous ; stem 

 tetragonal, covered with minute hairs ; leaves on short petioles, 

 ovate-lanceolate, acuminated, crenulately serrated, villous above, 



ovQ wroc, ous otos, an ear ; auricles of the connectives of the an- 

 thers short), D. C. prod. 3. p. 136. Calyx 4-cleft, without 

 any appendages. Petals 4, subaristate, usually convolute. Con- 

 nectives of anthers furnished with 2 short auricles each. Ova- 

 rium bearing bristles at the apex, not 4-toothed. Capsule 4- 

 celled. — Sufiruticose plants. 



3 A. RosMARiNiFouuM (D. C. 1. c.) shrubby ; branches terete, but clothed with hairy tomentum beneath ; cymes on long pe- 

 echinated; leaves nearly sessile, oblong-linear, 3-nerved, with duncles, axillary, 3-flowered; calyx villous, with 4 ovate 

 revolute quite entire edges ; peduncles 1-5-flowered, pendulous; ciliated lobes; anthers rather dissimilar. 0-?^S. Native of 

 calyx hispid ; petals convolute. T^ 



arid hills. Rhexia rosmarinifolia, Ruiz et Pav. fl. per. 3. p. 

 84. t. 318. f. a. Leaves small, numerous. Flowers violaceous, 

 spreading in the night and morning. Style exserted, rather 

 clavate. 



Rosemary-leaved Arthrostemma. Shrub 1 to 2 feet. 



4 A. iute'scens (D. C. 1. c.) shrubby ; branches rugged, 

 pilose; hairs thick, stiff, short; leaves ovate, 3-nerved, curled 



a little, white beneath ; peduncles 3-flowered ; calyx pilose ; what retrograde ha 



Native of Peru, on Brazil, in woods, in the province of Rio Janeiro and Minas 



Geraes, but rare. Rhexia herbacea, Schrank et Mart. mss. 

 Petioles hairy. Petals obovate-oblong, when young ciliated at 

 the apex. Anthers 8 oblong, with smooth beaks, the 4 longest 

 having straight connectives, and the 4 shortest arched ones. 



Herbaceous Arthrostemma. PI. 1 foot. 



9 A. HiRsuTi'ssiMUM (D. C 1. c) herbaccous, erect ; stem | 

 tetragonal, very hairy from long, ratl.er bristly, spreading, som - 



petals convolute. Tj . S. Native of Peru, on the mountains. 



minated, crenulately 



irs ; leaves on short petioles, lanceolate, ^cu- 

 ly serrated, densely clothed with adpressea 



Rhexia lutescens, Ruiz et Pav. fl. per. 3. p. 84. t. 319. f. a. villi; cymes on long peduncles, axillary, 3-flowered; cai>xv» 



Leaves small, firm ; when in a dry state they are olive-coloured 

 above, and yellowish beneath. Calyx purplish, with lanceolate 

 teeth. Petals yellowish. 



Yelloivhh Arthrostemma. Sh. 2 feeU 



5 A. QuiNQUENEKVE (D. C. 1. c) shrubby, much branched ; 

 branches tetragonal, beset with adpressed bristles ; leaves petio- herb 

 late, ovate, acute, quite entire, 5-nerved, bristly above, but vil- 

 lously tomentose beneath; peduncles axillary and terminal, 

 many-flowered, inflexed at the apex ; flowers drooping ; calyx 

 bristly, with an ovate tube, shorter than the lobes, which 

 are setaceous. T2 • S. Native of Peru, on mountains and 

 hills. Rhexia quinquenervis, Ruiz et Pav. fl. per. 3. p. 83. 

 t. 321. f. 3. Petals almost conniving into a tube, ciliated. Con- 

 nectives of anthers furnished each with 2 very short auricles. 

 Capsule 4-valved, bristly at the apex. Style exserted. 



F/ve-n<?rtcrf-leaved Arthrostemma. Sh. 6 feet. 



lous, wi'th 4 ciliated^lobes ; anthers dissimilar. ©• S. ,,^ 

 of Brazil. Very like J. herhaceum, but differs in the hairiness. 

 Ovarium bristly at the apex. Seeds cochleate. 

 Very-hairy Arthrostemma. 



aceous 



r c/ u-iiui/ u iii mi waicniiua. a 1. 1 lOOt. ^ Irrtfist 



10 A. Martiusia^num (D. C. 1. c.) stem erect, hair>^ aiiw ^ 



oppositely and paniculately branched; ^^'^^^^^^^ 

 quadrangular; leaves on short petioles, ovate-lanceolate, ^^» 



serrulated, 5-nerved, beset with adpressed strigae ^^T^J^^^^ 

 with soft villi beneath; peduncles dichotomous, S-7-no\ • 

 '2f.?S. Native ofPara, in Brazil. t>»^^v;, namcul^ta, i^i 



herb, and Schrank, mss. but not Ham 

 Ser. mss. 



Rhexia panic»i<tw. --" 

 lit. Rhexia Martiusiiitf. 



Tube 



b A. CAMPANULA RE (D.C. J. c) shrubby ; branches clothed Mar/m'^ Arthrostemma. 



Rhexia cerastiif oHa, Schrank, et ^i^'"^' J"^^^{^ ^.-ate, 

 of calyx ovate, rather pilose; lobes 4, acute- ,^^i i^ase* 

 purple, pilose on the back. Anthers articulated at tne ^^^^^ 

 the articulation distant from the cells, and tumid on o^ 

 Ovarium bristly at the apex. 



]^7^^\ /ufous down; leaves ovate, 5'nerved^ quite entire, very 



ath ; flowers drooping, cam- 

 panulate ; calyx pilose. Ij . S. Native of Peru, in cold places 

 near Loxa, at the elevation of 3000 feet. ■"' 



hispid above, but tomentose b 



1 1 A. FOLYGONOIDES (D 



I 



PI. 1 to g feet. i.ranclrt 



loose, tetragonal, beset with a few slender adpresset ^^^^ 



• entire, S-nerveM, 



•I 1 eru, in cold places leaves on short petioles, oblong, quite entire, ^"" j,. ^.^ goli- 

 Rhexia campanuliris, with adpressed bristles on both surfaces ; flowers axi ^^^ ^j^^ 



Uonpl. rhex. p. 35. t. 14. Petals deep purple or violaceous, tary, almost sessile; lobes of calyx 4, rarely 5, longer 



