50 ON SOUTH-AMEEICAN APOCYNACE^. 



A species very distinct from the preceding : it is arborescent, 18 feet high, lactescent, 

 the axUs of the branchlets 2-5 in. apart ; leaves 3|-7 in. long, li-2 in. broad, on petioles 

 1-2 lines long ; raceme IJ in. long ; pedicels 3-4 lines long ; sepals 1^ line long ; corolla 

 in bud, tube 4^ lines long, its terminal knob 2J lines long, inflected portions of seg- 

 ments 5| lines long. According to Spruce the tube is white, the segments and mouth 

 purpurascent (not yellow). 



3. BoNAFousiA LATiPLORA, nob. : Peschiera latiflora, Benth. MS. : Tabernmmontana flavicam, Miill. 



(non B. & Sch.) I. c. p. 77. In Amazonas, v. s. in hb. meo et Mus. Brit. Santarem (Spruce 



256). 

 Evidently a very different plant from that described by Eomer and Schultes, which 

 has divaricately dichotomous branches, with flowers on a long peduncle. It has 

 slender divaricate branches ; leaves opposite, rarely verticillately ternate, oblong, acute 

 at the base, with a rather long obtuse acumen, pallid and yellowish below, with sub- 

 prominulent midrib and divaricated nerves, which are reddish ; the leaves are unequal 

 in each axil, 2^ and 2| in. long, 1 in. and ^ in. broad, on slender petioles 2-3 lines long ; 

 the upper leaves are smaller, the lower ones larger and more oval. The peduncle, seated 

 in the dichotomy of the branches, is about 3 lines long, bearing about 4 flowers on sub- 

 umbellate pedicels 4 lines long ; sepals acute, 1 line long ; tube of corolla very narrow 

 and cylindrical, a little inflated below the mouth, 10 lines long, segments linear oblong, 

 7 lines long, 2 Hues broad, expanded in aestivation, inflected near the middle, the deflected 

 summits reaching the mouth, sinistrorsely convoluted ; stamens included in the ventri- 

 cose portion of the tube ; anthers 2-aristate at the base, acuminate at the summit ; disk 

 membranaceous, adnate, ^ the length of 2 pointed ovaries ; style filamentous, reaching 

 the stamens; clavuncle incrassated, oblong, 5 -grooved, with a basal umbraculiform 

 appendage ; stigmata short. 



4. BoNAFousiA 0B1.0NGIF0LIA, nob. : Tabernamontana oblongifolia, A. DC. I. c. p. 368 ; Miill. I. c. p. 74. 



In Brasilia: v. s. in hb. Mus. Brit. Jacobina, prov. Bahia (Blanchet 951, et, sec." DC, Blanchet 

 2358). 



. Branchlets slender, pale brown, slriolated, with axils lf-2J in. apart; leaves very 

 patent, lanceolate oblong, somewhat heterophyllous, acute and subinaequilateral at the 

 base, acutely acuminated at the summit, chartaceous, pale green above, with semi- 

 immersed nerves, paler and opake beneath, with a stout midrib and yellow prominulent 

 nerves, 3 and 5^ in. long at each node, l|-li in. broad, on slender petioles 4-5 lines 

 long ; panicle terminal in the dichotomy of the branchlets ; peduncle slender, 4 lines 

 long, the 2 branches at its apex 2 lines long ; pedicels few, slender, 6 lines long ; oblong 

 sepals obtuse, submembranaceous, spotted with yellow dots, 1 J line long ; tube of corolla 

 cylindrical, ventricose in the middle, 9 lines long, its roundish oblique segments being 

 6 lines long, infolded sinistrorsely in the bud, the extremities descending into the mouth 

 of the tube ; stamens seated in the lower contraction of the tube, included in the swollen 

 portion, emanating from as many pilose lines; 2 oblong, pointed, adpressed, smooth 

 ovaries, embraced at their base, for J of their length, by a very thin disk. 



