MELASTOMACE^. XXXIIL Arthrostemma. 



757 



lube, ovate-lanceolate, each 



terminating in a hair. ^•? . 

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

 Geraes. 



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



milum. 



PI. 1 to 2 feet. 



sufficient to constitute a distinct genus. 



18 A. 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 

 denticulated, 3-rierved ; flowers few, almost sessile at the tops spur at the base. '^ . S. Native of Mexico. Flowers purple, 



like those of a species of Lasldndra^ but differs in the petals 

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

 beset with bristles. 



Rhexia polygonoides, Mart. herb. V exy like A. pu- 



Leaves terminating in a longhair. Hairs on the calyx 



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



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



Polygonum-Uke Arthrostemma. 



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



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



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

 are subulate at the apex ; connectives of anthers furnished with 

 2 horns each. 



^2 . S. Native of Cayenne, at Aroura in sandy 

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

 Petals concave, violaceous. 

 • Villous Arthrostemma. 



13 A. Auble'tii (D. C. L c.) suffruticose, decumbent, hairy 



in 



Capsule 4-celled. 

 PI. decumbent. 



;yp«rrc^-anthered Arthrostemma. Sh. 1 to 2 feet. 



19 A. Deppea^na (Schlecht. et Cham, in Linnaea. 5. p. 5QG.) 

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

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



> on the under surface, and 



every part; branches tetragonal; leaves on short petioles, quite entire, strigose on the 

 roundish, acutish, serrulated, 5-nerved ; flowers solitary, termi- 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 antlicrs drawn out into a simple ascending spur. 

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



Flowers purple. 



Deppe's Arthrostemma. 



Fl. Aug. 



Sh. 1 to 2 feet. 



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

 nectives of anthers furnished with 2 horns at the base. Tp . 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. 

 AuhleVs Arthrostemma. Shrub decumbent. 



14 A. VERsi'coLOR (D. C. 1. c.) suffruticose, pilose ; leaves 



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



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



apex. Tj . 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 Ch^etogdsira cUnipodifoUa. 



Pctrty-coloured'Rowered 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 



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



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

 One. * " 



^ . S. Native near Esmaraldas, on the Orinoco. Rhexia Native of South America, on the banks of the river Amr 



^ummularioides, Bonpl. rhex. 2. p. 23. Flowers rose-coloured. Rhexia canescens, Bonpl. rhex. p. 14. t. 18, Rhexia Bonplandii, 

 *^erhaps this species belongs to a different section. 



20 A. MYRToiDEUM (D, C. 1. c.) suffruticosc ; branches clothed 

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

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

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

 nate, glabrous ; spurs of anthers long, nearly terete. ^2 • •^* 

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



Rhexia myrtoidea, Bonpl. rhex. t. 3. 

 lanceolate. 



Petals violaceous, oval- 



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. I. c.) suffiuticose ; 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-togcther, axillary^ 

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



Kunth, ined. Rhexia inc^na, Spreng. syst. 2. p. 309. Flowers 

 violaceous. 



Bonpland's Arthrostemma. Sh. 3 feet. 



. 



Money-wort-llke Arthrostemma. Shrub decumbent. 



. Sect. IV. Trtfurca'ria (from tres, three, SLXxHf urea, ^^ ^^^ ^.v*w.i,.vx.*x.^ .v^..* ^^. ^ ^ , 



>n reference to the connectives of the anthers being drawn out branched ; branches tetragonal, and are, as well as the pedun- 



?^ch into a 3-toothed appendage, or into 3 bristles at the base). ' " " 



^' C. prod. 8. p. 138. Calyx 4-cleft. Petals 4. Connectives 

 ^f anthers drawn out each into a tridentate appendage, or into 3 

 ^"stles at the ht 

 16 A. 



Stem herbaceous, quadrangular ; leaves cordate, smooth on both 

 *iirfaces, serrulated and ciliated on the margins ; appendages of 

 ^^thers tridentate at the base. 1/ . S. Native of Peru. 

 Ci/;a/ec?-leaved Arthrostemma. PI. 2 to 3 feet. 



^7 A. LATiFOuuM (D. Don, 1- c.) stem shrubby; leaves 

 '^J'oad, ovate, acuminated, serrulated and ciliated; panicle large ; 



cTtTA^TUM (Pav. ex D. Don, mem. soc. wern. i. p. 299.) 



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

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



bos 



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

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



Seeds cochleate. 



TwO'headed-anlhcred Arthrostemma, Sh. 1 to 2 feet. 



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

 , S. Native of Peru, in woods. Rhexia dicrannnthera, Ruiz 



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



Native of French 



^Ppendages of anthers of 3 bristles. ^ 

 ^uiana. 



Broad-leaved Arthrostemma. Shrub. 



Sect. V. MoNociiiE'xuM (from fioro^:^ monosy one, and x^'f'/* 

 ^haite^ a bristle ; in reference to the appendages of anthers being 

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

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

 ^ners drawn out each into one simple or emarginate ascending Spreng. syst. 2. p. 313 



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

 Native of Peru. The rest unknown. 



Lined'letxved Arthrostemma. Shrub. 



24 A. MULTiFLoRLM (D. C. 1. c.) suffVuticose, branched at the 

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

 tire, villous ; thyrse paniclcd, 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. IG. Osbcckia Bonplandiuna, 



Flowers rose-coloured. 



