222 ON SOUTH-AMEEICAN APOCYNACEiE. 



ovate, dolabriform, acute within the sinister angle, dextrorsely convolute, 9 lines long 

 and broad ; stamens seated on a retrorsely pilose ring ia the contraction of the tube ; 

 anthers cohering, membranaceous at the apex, obtusely bifurcate at the base, nearly as 

 long as the 2 ovaries. 



The leaves on their lower side bear much the peculiar appearance of those of M. 

 brachystachyus. 



11. MiTozus RUGOsus, nob. : Echites rugosa, Benth. Journ. Bot. iii. p. 248 ; A. DC. I. c. p. 460 : Ambly- 



anthera versicolor, var. intermedia, Miill. /. c. p. 146. In Guiana (Schomb. 350) : non vidi. 



A scandent species, its older branches glabrous, the younger scabridly puberulous; 

 leaves oblong, roundly emarginate or subcuneate at the base, shortly acuminate, sub- 

 coriaceous, rugous and scabridly pubescent above, or subsequently smooth, cano-tomen- 

 tose beneath, or afterwards nearly smooth, 2 in. long, petiolate ; peduncle of raceme 

 stout, spicately many-flowered; bracts lanceolately subulate, not exceeding the calyx 

 pedicels very short; sepals short, very acute, each with a broadly ovate inner scale 

 corolla yellow, with a cylindrical tube 1 in. long, spreading above; segments broad 

 stamens seated on a pilose ring in the contraction of the tube ; disk urceolate, of 5 ob- 

 long fleshy obtuse lobes, partly subconnate. 



MiiUer regarded this plant as a variety of E. versicolor. 



12. MiTozus BRACHTSTACHTUS, nob. : Echites brachystachya, Benth. Joum. Bot. iii. p. 248 : Amblyanthera 

 versicolor, var. ^, intermedia, Miill. /. c. p. 146. In Guiana Brit. : v. s. in herb, meo (Schomb. 350, 

 in errore) et in herb.^Mus. Brit. (Schomb. 565). 



A climbing species, with very slender flexuous pubescent branches, with ciliate axils 

 3-4 in. apart ; leaves elliptic-oblong, auriculately cordate at the base, acute and mucro- 

 nate at the summit, membranaceous, dark green above, opake, finely puberulous, nerves 

 immersed, palish green beneath, opake, cano-tomentellous, with fine reddish prominulent 

 nerves, transverse veins very reticulated, 2-3 in. long, |— Ij in, broad, on pubescent 

 petioles 2-3 lines long ; raceme lateral, 2 in. long, on a stout scabrid peduncle 1 in. long, 

 bearing above many spicate flowers on alternate pedicels, pubescent, 2 lines long, with 

 acute bracts ; sepals triangularly acute, recurved at the apex, gibbous at the base, 2 lines 

 long, each with 2 inner acute scales ; tube of coroUa 20 lines long, narrowly contracted 

 at the base for 4 Hnes, broadly funnel-shaped above, membranaceous, often plicated into 

 a narrower space ; segments inequilateral, broadly dolabriform, 9 lines long and broad ; 

 stamens seated in the contraction of the tube, on a dense white pilose ring ; disk urceo- 

 late, fleshy, with a 5-cleffc margin surrounding the ovaries. 



A species very near M. versicolor in the peculiar appearance of its leaves. 



13. MiTOZTJs sYMPHiTOCARPUSj uob. : EcUtss symphitocarpa, Mey. Ess, p. 132; A. DC. I.e. p. 467; 



Griseb. Mor. Brit. W. Ind. p. 414 (sub Synechites) . In Guiana, Essequibo : non vidi. 



A climbing species near M. brachystachyus, with simple cirrus-like shining branches, 

 subscabridly rufescent, with white lenticels ; leaves opposite, patent, elliptic- ovate, 

 obtuse, sagittately cordate, with an acute sinus at the base (younger ones there almost 

 entire), acute or acuminate, subscabrid above, tomentous beneath, reticulately veined, on 



