MELASTOMACEJE. XXXIII. ARTHROSIEMMA. 



757 



tube, ovate-lanceolate, each terminating in a hair. I/ . ? S. 

 Native of Brazil, in marshy fields in the province of Minas 

 Geraes. Rhexia polygonoides, Mart. herb. Very like A. pu- 

 tnilttm. Leaves terminating in a longhair. Hairs on the calyx 

 simple, and adpressecl. Petals small, white. Ovarium bristly 

 at the apex. Bonpl. rhex. t. 35. f. 4. 



Polygonum-like Arthrostemma. PI. 1 to 2 feet. 



12 A. VILLOSUM (D. C. 1. c.) suffruticose, decumbent, hairy in 

 every part ; branches tetragonal ; leaves on short petioles, oval, 

 denticulated, 3-rierved ; flowers few, almost sessile at the tops 

 of the branches; calyx with an ovate tube, and 4 lobes, which 

 are subulate at the apex ; connectives of anthers furnished with 

 '- horns each. fj . S. Native of Cayenne, at Aroura in sandy 

 meadows. Rhexia villosa, Aubl. guian. 1. p. 334. t. 129. f. 1. 

 Petals concave, violaceous. Capsule 4- celled. 



Villous Arthrostemma. PI. decumbent. 



13 A. AUBLE'TII (D. C. 1. c.) suffruticose, decumbent, hairy 

 in every part ; branches tetragonal ; leaves on short petioles, 

 roundish, acutish, serrulated, 5-nerved ; flowers solitary, termi- 

 nal ; tube of calyx globose ; lobes subulate at the apex ; con- 

 nectives of anthers furnished with 2 horns at the base. Tj . S. 

 Native of Guiana, in sandy meadows at Aroura. Rhexia lati- 

 folia, Aubl. guian. t. 129. f. 2. Very like the preceding species, 

 but differs in every part, being twice the size. 



AubleCs Arthrostemma. Shrub decumbent. 



14 A. VERSI'COLOR (D. C. 1. c.) suff'ruticose, pilose; leaves 

 petiolate, ovate, serrulated, 5-nerved, discoloured beneath ; 

 flowers terminal, solitary ; lobes of calyx 4, serrated at the 

 apex. T? . S. Native of Brazil, on the sea shore. Rhexia 

 versicolor, Lindl. bot. reg. t. 1066. Petals obovate, ciliated, 

 at first white, but at length becoming reddish. Ovarium bristly 

 at the apex. Anthers hardly biauriculate at the base. Habit 

 of Chcetogastra clinipodifolia. 



Party-coloured-fiowered Arthrostemma. Fl. Sept. Clt. 1825. 

 Shrub 1 foot. 



15 A. NUMMULARIOIDES (D. C. 1. c.) shrubby, much branched, 

 clothed with minute down ; leaves petiolate, nearly orbicular, 

 cordate, crenated, 5-nerved, rather tomentose beneath ; flowers 

 solitary, on the tops of the axillary branchlets ; connectives of 

 anthers drawn out each into 2 blunt appendages, or one bifid 

 one. Tj . S. Native near Esmaraldas, on the Orinoco. Rhexia 

 nummularioides, Bonpl. rhex. 2. p. 23. Flowers rose-coloured. 

 Perhaps this species belongs to a different section. 



Money-nort-llke Arthrostemma. Shrub decumbent. 



SECT. IV. TRIFURCA'RIA (from tres, three, andfurca, a fork; 

 in reference to the connectives of the anthers being drawn out 

 each into a 3-toothed appendage, or into 3 bristles at the base). 

 D. C. prod. 3. p. 138. Calyx 4-cleft. Petals 4. Connectives 

 of anthers drawn out each into a tridentate appendage, or into 3 

 bristles at the base. 



16 A. CILIA'TUM (Pav. ex D. Don, mem. soc. wern. 4. p. 299.) 

 stem herbaceous, quadrangular ; leaves cordate, smooth on both 

 surfaces, serrulated and ciliated on the margins ; appendages of 

 anthers tridentate at the base. I/ . S. Native of Peru. 



Ciliated-leaved Arthrostemma. PL 2 to 3 feet. 



17 A. LATIFOLIUM (D. Don, 1. c.) stem shrubby; leaves 

 broad, ovate, acuminated, serrulated and ciliated ; panicle large ; 

 appendages of anthers of 3 bristles. Tj . S. Native of French 

 Guiana. 



Broad-leaved Arthrostemma. Shrub. 



SECT. V. MONOCII^E'IUM (from povoe, monos, one, and x alT 1' 

 chaite, a bristle ; in reference to the appendages of anthers being 

 drawn out into one single or emarginate spur at the base). D. C. 

 prod. 3. p. 138. Calyx 4-cleft. Petals 4. Connectives of an- 

 thers drawn out each into one simple or emarginate ascending 



spur, or in a bristle at the same base. Perhaps this section is 

 sufficient to constitute a distinct genus. 



ISA. CALCARA'TUM (D. C. 1. c.) shrubby ; branchlets some- 

 what tetragonal, smoothish, bearing whorles of bristles at the 

 knots ; leaves petiolate, oblong, acuminated, 3-nerved, ciliately 

 serrated, beset with a few bristles beneath ; flowers pedicellate, 

 solitary, or by threes at the tops of the branchlets ; calyx beset 

 with adpressed bristles : with 4 lanceolate, somewhat coloured, 

 ciliated lobes ; anthers with long beaks, ending in a long slender 

 spur at the base, fj . S. Native of Mexico. Flowers purple, 

 like those of a species of Lasidndra, but differs in the petals 

 being 4, and in the stamens being glabrous. Ovarium densely 

 beset with bristles. 



Spurred-anthered Arthrostemma. Sh. 1 to 2 feet. 



19 A. DEPI-EA'NA (Schlecht. et Cham, in Linnrea. 5. p. 566.) 

 suffruticose, much branched ; branches terete, beset with ad- 

 pressed hairs ; leaves narrow-lanceolate, bluntish, triple-nerved, 

 quite entire, strigose on the nerves on the under surface, and 

 between the nerves on the upper surface, and on the margins ; 

 flowers terminal, solitary ; tube of calyx turbinate, strigose ; 

 calycine segments lanceolate, acute ; petals roundish, obovate ; 

 connectives of anthers drawn out into a simple ascending spur. 

 Tj . S. Native of Mexico, at San Andres and on Serro Colorado. 

 Flowers purple. 



Depps' s Arthrostemma. Fl. Aug. Sh. 1 to 2 feet. 



20 A. MYRTOIDEUM (D. C. 1. c.) suff'ruticose ; branches clothed 

 with powdery down ; leaves oblong, quite entire, glabrous, 

 triple-nerved, white beneath, perhaps from down ; flowers axil- 

 lary and solitary, or terminal and tern ; tube of calyx turbi- 

 nate, glabrous ; spurs of anthers long, nearly terete, Tj . S. 

 Native of Mexico, near Quaretaro ; and near Santa Fe de Bogota. 

 Rhexia myrtoidea, Bonpl. rhex. t. 3. Petals violaceous, oval- 

 lanceolate. Adult branches glabrous, with separable bark. 

 Ovarium downy at the apex from minute stellate down. 



Myrtle-like Arthrostemma. Sh. 2 feet. 



21 A. BONPLA'NDII (D. C. 1. c.) suffruticose ; branches 

 densely clothed with short down ; leaves on short petioles, ovate, 

 5-nerved, quite entire, villous on both surfaces from soft down, 

 canescent beneath; flowers pedicellate, 1-3-together, axillary, 

 and terminal ; tube of calyx ovate, longer than the lobes. Tj . S. 

 Native of South America, on the banks of the river Amazon. 

 Rhexia canescens, Bonpl. rhex. p. 14. t. 18. Rhexia Bonplandii, 

 Kunth, ined. Rhexia incana, Spreng. syst. 2. p. 309. Flowers 

 violaceous. 



Bonpland's Arthrostemma. Sh. 3 feet. 



22 A. DICRANANTHE'RUM (D. C. 1. c.) suffruticose, much 

 branched ; branches tetragonal, and are, as well as the pedun- 

 cles, calyxes, and leaves, beset with long spreading hairs; leaves 

 almost sessile, ovate, acute, 5-nerved, entire ; flowers subcorym- 

 bose ; calyx with an ovate-globose tube, and 4 oval acute lobes. 

 Jj . S. Native of Peru, in woods. Rhexia dicrananthera, Ruiz 



et Pav. fl. per. 3. p. 84. t. 320. f. a. Arthr. multifldrum, D. 

 Don, in mem. wern. soc. 4. p. 299. Ovarium pilose at the apex. 

 Seeds cochleate. 



Tmo-headed-anthered Arthrostemma. Sh. 1 to 2 feet. 



23 A. LINEA'TUM (D. Don, 1. c.) stem shrubby, pilose ; leaves 

 lanceolate, quite entire, with hairy lines on both surfaces. Jj . S. 

 Native of Peru. The rest unknown. 



Lined-leaved Arthrostemma. Shrub. 



24 A. MULTIFLORUM (D. C. 1. c.) suffruticose, branched at the 

 base ; leaves on short petioles, lanceolate, 5-7-nerved, quite en- 

 tire, villous ; thyrse panicled, terminal, many-flowered ; appen- 

 dages of anthers bristle-formed, rising from the base. Tj . S. 

 Native on the banks of the Orinoco, in humid shady places. 

 Rhexia multiflora, Bonpl. rhex. t. 16. Osbeckia Bonplandiana, 

 Spreng. syst. 2. p. 313. Flowers rose-coloured. 



