ON SOTJTH-AMEEICAN APOCYNACILE. 149 



14. Prestonia l^ta, nob. : scandens, ramulis teretibus, fistulosis, pallidis, striolatis, hirsutulis cum pilis 

 imo tuberculatis ; axillis remotis, ad lineam transversam stipulis plurimis subsetaceis munitis : foliis 

 ovalibus, imo rotundatis, vix cordatis, apice in acumen acutum subito constrictis, submembranaceis, 

 marginibus ciliatis vix revolutis, supra viridibus, subnitentibusj in costa sulcatis, nervis prominulis 

 Tcnisque transversum reticulatis fusco-rufescentibus, et parcissime pilosis, subtus laete flavis, opacis, 

 glabris, sed costa nervis venisque rufo-tomentellis ; petiolis brevibus, rufo-puberulis : corymbo laterali, 

 quam folium 3plo breviore ; pedunculo validoj dense pubescente, imo stipellis involucellatOj apice 

 2-ramoso, ramulis congestim plurifloris ; pedicellis calyce paullo longioribus, bracteola i breviore 

 suffultis ; sepalis majusculisj oblongis, subito cuspidatis, membranaceis, viridulis, extus parce pilosis, 

 Tindtdatis, iutus squama lata tridenticulata munitis; coroUse glabrae tubo validiuscule cylindrico, fauce 

 annulo integro, et subtus appendicibus 5 lanceolatis apice exsertis instructo ; segmentis rhomboideo- 

 ovatis, angulo sinistro acutis, tubo brevioribus; staminibiis ex lineis 5 pilosis medio tubi inser- 

 tis ; antheris acuminatis, imo biaristatis ; disco urceolato, carnoso, apice breviter 5-lobo, ovario 

 longiore; stylo tenui; clavuncula incrassata, oblonga, B-glandulosa, imo membrana peltata in- 

 structa ; stigmate terminal!, brevi, oblonge bilobo. In Brasilia : v. v. et s. in herb, meo Rio de Janeiro, 

 Monte Corcovado. 



A species with its fistulous branches 2 lines thick, having stipuliferous axils 8 in. apart ; 

 leaves 4-5 in. long, 2^3 J in. broad, on petioles 2 lines long ; peduncle of corymb 9 lines 

 long, its branches 3 lines long ; pedicels rather stout, 4-6 lines long ; sepals 6 lines long, 

 3 lines broad ; tube of corolla 7 lines long, 2 lines broad ; segments 4 lines long, 3 lines 

 broad ; filaments 1 line long ; anthers 2^ lines long. 



15. Prestonia megalagrion, nob. : Heemadictyon megalagrion, Miill. I. c. p. 170 : Echites megagros, Veil. 

 PI. Plum. p. 110, Icon. iii. tab. 33. In Brasilia, prov. Rio de Janeiro, Campo Grande (Velloz) : 

 V. s. in herb. Mies. Brit. Itagoahy (Bowie and Cunningham) . 



A handsome species, agreeing in habit and inflorescence with Prestonia. Its scandent 

 branches are subtomentous, lactescent, with axils 5-6 in. apart, furnished with stipules ; 

 leaves opposite, patent or reflected, broadly ovate-oblong, roundish at the base, shortly 

 acuminate and mucronate at the apex, subplicate, crenulate, and ciliate on the 

 margins, fuscous green above, obsoletely pilose, sulcate along the arching divaricated 

 nerves, yellow hispidulous along the slender immersed midrib, beneath ferruginously 

 opake, patently hispid on the midrib and prominent nerves, 6^-7^ in. long, 2J-4J in. 

 broad, on stout hispid petioles 3-4 lines long; corymb solitary and lateral at each node, 

 hispidly pilose, on a stout reflected peduncle 9 lines long, rising out of a stipuloid 

 involucel, shortly 3-4-branched at the apex, and bearing numerous flowers aggregated 

 in a head 2 in. in diameter ; pedicels densely tomentous, recurved, 4 lines long, sup- 

 ported by linear hispid bracteoles 1^ line long; sepals oblong, acuminate, pilose on both 

 sides, 7 lines long, 2 lines broad, each with an inner broadly ovate truncated scale denti- 

 culate at the apex; tube of corolla yellowish, pruinosely pubescent, 8 lines long, its 

 mouth with an annular ring, and beneath it 5 subulate subexserted appendages ; seg- 

 ments inequilaterally oblong, acute, 6 lines long ; stamens as in the preceding species ; 

 disk urceolate, submembranaceous, with an emarginately 5-lobed margin, longer than the 

 included 2-lobed ovary. 



