ASCLEPIADE.E. LXII. CYNAXCHCM. LXIII. METAPLEXIS. LXIV. DITASSA. 



155 



rona cylindrical, 5-cleft. Follicles oblong, acuminated, tomen- 

 tose. Stigma sessile, ovate-oblong, large. 



Scentlets-fiovtered Cynanchum. Shrub twining. 



68 C. FU SCUM (Schuhes, syst. 6. p. 111.) stem rooting at the 

 base, and branched at the apex ; leaves cordate-lanceolate, 

 small, bearded at the base ; umbels axillary, twin. 1/[ . 

 G. Native of Cochinchina, on old walls, and among ruins. 

 Asclepias fusca, Lour. coch. p. 170. Leaves small. Flowers 

 brownish purple, small ; corona of 5 auricles, without horns. 

 Follicles 2, small, subulate, ventricose outside, and flat inside. 

 Seeds curved, comose. 



.Sron-n-flowered Cynanchum. PI. creeping. 



69 C. MCCROSA^TCM (Andr. bot. rep. t. 515.) stems hairy ; 

 leaves subcordate, mucronate ; umbels interpetiolar, axillary, 

 compound ; corollas rotate, greenish purple ; segments acute, 

 reflexed, twisted. H . *"*. S. Native of Trinidad. Pollen masses 

 pendulous. 



.1/Hcronafc-leaved Cynanchum. Fl. July, Aug. Clt. 1804. 

 Shrub tw. 



70 C. VERsicoLOR (Bunge, in mem. acad. petersb. 2. p. 118.) 

 corona simple, bluntly 5-lobed ; segments of corolla ovate, acute, 

 downv ; umbels axillary, sessile; leaves oblong-ovate, or cor- 

 date, acute, downy ; stem twining. fj . < ~ > . G. Native of 

 China, on mountains, near Lun-zuan-ssy, and Zui-wey-skan. 

 Corolla at first greenish, then brown. Nearly allied to C. rirt- 

 diflcrwn. 



Parti-coloured-Qowered Cynanchum. PI. twining. 



71 C. ATRA'TCM (Bunge, 1. c. p. 119.) corona simple, bluntly 

 5-lobed ; corolline segments oblong, emarginate at the apex, 

 downy outside ; calyxes and pedicels tomentose ; umbels axil- 

 lary, sessile ; leaves on short petioles, broad-ovate-oblong, acute, 

 with undulated edges, densely downy above, tomentose beneath, 

 as well as the stems. I/. . ^\ G. Native of China, near Ssi-jui- 

 ssy, and Tan-schan. Flowers dark brown. 



Z)ar-flowered Cynanchum. PI. I to 2 feet. 



X.B. What is C. cirrhosum, Swartz, in cat. hort. Dorp. 1810, 

 and Hort. Gorenk. 



Cult. For the culture and propagation of the hardy species, 

 see Asclepias, p. 143. ; and for that of the tender species see 

 Pergularia, p. 133. 



LXIII. METAPLE'XIS (from ptra, meta, with, and *-Xr, 

 pleco, to fold ; in reference to the cucullate leaflets of corona). 

 R. Br. in wern. soc. mem. 1. p. 48. 



LIK. SY:-T. Penlandria, Digynia. Corolla subrotate. Sta- 

 mineous corona 5-leaved ; leaflets small, cucullate, alternating 

 with the anthers. Anthers terminated by a membrane ; pollen 

 masses ventricose, pendulous, fixed by their sides. Stigma fur- 

 nished with an undivided elongated beak. Follicles unknown. 

 A twining glabrous subshrub. Leaves cordate, opposite. 

 Racemes pedunculate, interpetiolar. Limb of corolla bearded. 



1 M. STAVSTOXII (Roem. et Schultes, syst. 6. p. 111.). Ij . 

 ^\ G. Native of China, in the province of Peckeley, Sir G. 

 Staunton. The only certain species. 



Staunton's Metaplexis. Shrub tw. 



. M. ? MUCROXA'TA (Spreng. neuw. entd. 1. p. 269. syst. 1. 

 p. 854.) leaves subcordate-oblong, mucronate, glaucous, gla- 

 brous; peduncles umbellately 6-flowered, shorter than the 

 petioles. 1? . ^. S. Native" of the Cape of Good Hope. 

 Ascl. mucronata, Thunb. Corolla urceolate, white inside ; teeth 

 alternating with the pollen masses, which are cream-coloured 

 and oblong, united under the plicae of the column into a fulvous 

 heap. 



Mucronate-leaved Metaplexis. Shrub tw. 



Cult. See Pergularia, p. 133. for culture and propagation. 



S. Gynostegium appendiculate. Corona compound, in 2-S 

 series ; each series Kith a distinct insertion. Throat of corolla 

 without scale*. 



LXIV. DITA'SSA (from c, dis, double, and raaaw, tatto, 

 to dispose ; in reference to the double corona). R. Br. in mem. 

 wern. soc. 1. p. 49. Mart. nov. gen. bras. 1. p. 51. 



LIN. STST. Pentandria, Digynia. Corolla subrotate. Sta- 

 mineous corona double : outer one 5-parted ; the segments acu- 

 minated ; inner one 5-leaved, shorter, opposite the exterior ones 

 and anthers. Anthers terminated by a membrane; pollen 

 masses ventricose, fixed beneath their apexes, pendulous. Stigma 

 ending in an obtuse point. Follicles smooth ? Twining, gla- 

 brous shrubs, natives of Brazil. Leaves opposite, flat. Umbels 

 interpetiolar. 



1 BA'JJKSII (Roem. et Schultes, syst. 6. p. 112.) glabrous ; 

 leaves flat ; flowers umbellate. Tj . ^\ S. Native of Brazil, 

 near Rio Janeiro, where it was collected by Sir Joseph Banks. 



Banks's Ditassa. Shrub tw. 



2 D. DECUSSA'TA (Mart. nov. gen. bras. 1. p. 51. t. 31. f. 1.) 

 shrubby, erect ; leaves sessile, approximate, ovate-cordate, with 

 reflexed sides, inversely navicular, wrinkled, hairy ; peduncles 

 many-flowered ; flowers subcymose. >? . S. Native of Brazil, 

 in the diamond district of the province of Minas Geraes, in 

 rugged mountainous places, at Lavras da Pindaiba. Stem vil- 

 lous. Corolla whitish green outside. 



Z)ec**are-leaved Ditassa. Shrub erect. 



3 D. MUCROKA'TA (Mart. 1. c. p. 52. t. 31. f. 2.) frutescent; 

 stem twining ; branches usually erect ; leaves ovate-lanceolate, 

 downy, on short petioles, bluntish, but mucronate, with reflexed 

 edges ; flowers umbellate, larger than those of the preceding 

 species, tj . *"\ S. Native of Brazil, in the province of Minas 

 Geraes, on hills at Morro de Villa Rica. 



Mucronate-\ea\ed Ditassa. Shrub tw. 



4 D. PASSERINOIDES (Mart. 1. c. p. 53.) frutescent, erect ; 

 leaves cordate at the base, ovate-lanceolate, acute, quite entire, 

 almost sessile, approximate, with reflexed edges ; umbels few- 

 flowered. Ij . S. Native of Brazil, on the alps in the diamond 

 district of the province of Minas Geraes. Very like D. decut- 

 tola, and probably only a variety of it. 



Patterina-like Ditassa. Shrub erect. 



5 D. ACEROSA (Mart. 1. c.) frutescent, erect ; leaves linear, 

 somewhat acerose, sometimes 3-4 in a whorl, villous ; flowers 

 umbellate. ^ . S. Native of Brazil, on mount Itambe da 

 Villa do Principe. 



Acerote-\ea\ed Ditassa. Shrub erect. 



6 D. I~E'VIS (Mart. 1. c.) frutescent, nearly erect ; branches 

 loose ; leaves on short petioles, linear-lanceolate, mucronate, flat, 

 glabrous on both surfaces ; umbels many-flowered ; peduncles 

 shorter than the flowers. Tj . S. Native of Brazil, on the 

 ascent to mount Itambe. in the province of Minas Geraes. 



Smooth Ditassa. Shrub erect. 



7 D. LIXEA'RIS (Mart. 1. c.) suffrutescent, twining ; leaves on 

 short petioles, linear, acute, mucronate, flat, glabrous on both 

 surfaces ; umbels few-flowered ; pedicels equal to the flowers. 

 I? . *"*. S. Native of Brazil, in Morro de Villa Rica. Flowers 

 larger than any of its congeners. 



Linear-leaved Ditassa. Shrub tw. 



8 D. RETD'SA (Mart. 1. c.) frutescent, twining ; leaves petio- 

 late, obovate-lanceolate, retuse, mucronate, glabrous, with flat 

 edges ; flowers umbellate, fc . ^. S. Native of Brazil, in 

 the province of Minas Geraes, on the ascent to Serra do 

 Caraca. 



,/?f/uw-leaved Ditassa. Shrub tw. 



9 D. OBCORDA'TA (Mart. J. c.) frutescent, twining ; leaves pe- 

 tiolate, ovate-roundish, reflexed, complicate, glabrous on both 



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