ON 80UTH-AMEEICAN APOCTNACE^. 167 



cylindrical, 6 lines long ; segments erect, oblong, 6 lines long, dextrorsely convolute in 

 SBstiration ; stamens inserted in tlie short basal constriction of tbe tube, on 5 tufts of white 

 hairs ; anthers linear, shortly cordate at the base ; disk of two opposite, rounded, fleshy 

 lobes, alternate with and half the length of the 2 free ovaries ; style very short, clavuncle 

 adhering to the anthers, conical, 5-grooved, with a basal expanded membrane ; stigmata 

 2, subulate. 



A drawing of this species, with its floral analysis, is given in Plate XXIV B. 



2. Prestoniopsis hirsuta, nob. : ramulis subtenuibus, strictis ; axillis remotis ; foliis oppositis, ovatis, imo 

 profundmsciile cordatis, apice angustioribus et in acumen breve subito constrictis, cbartaceis, margi- 

 nibus vix revolutis, supra fusee olivaceis, glabris, in ne^vis venisque transversim et crebre reticulatis 

 sulcatis, et ibi albide hirsutulis, subtus sordide femigineis, undique puberulis, nervis venisque promi- 

 nulis breviter hirsutis, petiolo tenui, quam limbus 5plo breviore : panieula capitata, puberula, in nodis 

 solitaria ; pedunculo elongato, tenuiter tereti, apice confertifloro ; pedicellis bracteis calyceque aequi- 

 longis et hirsutulisj bracteis linearibus acutisj sepalis eis similibus, marginibus rubris reflexis ; corollse 

 tubo cylindrico, subtenui, calyci sequilongo, intus lineis 5 albide pilosis munito ; segmentis sequilongis, 

 liaeari-oblongis, cum tubo extus sparsim pilosis, in sestivatione dextrorsum convolutis ; staminibus 

 ad contractionem basalem tubi enatis ; antheris imo cordatis, apice acuminatis, in conum subcohseren- 

 tibus ; disci lobis 2, oppositis, rotundatis, ovariis alternantibus et dimidio brevioribus ; stylo bre- 

 vissimo ; clavuncula conica 5-sulcata, imo membrana donata ; stigmatibus 2, subulatis, terminalibus. 

 In Venezuela : v. s. in herb. Mus. Brit. Tovar (Moritz) . 



A species near the preceding. Its axils are 5| in. apart ; leaves 3f in. long, 2| in. 

 broad, on petioles 8 lines long ; peduncle 3 in. long ; pedicels 4 lines long ; bracts 3 lines 

 long, unequal ; sepals 2|-3 lines long ; tube of corolla 4 lines long ; segments of the 

 same length. 



3. Prestoniopsis venosa, nob. : ramulis tenuibus, teretibus ; foUis ovatis, imo obtuse rotundatis, canali- 

 culatim pHcatis et recurvis, apice iu acumen breve obtusum repente constrictis, rigide cbartaceis, 

 marginibus subrevolutis, supra fusco-viridibus, glabris, in nervis adscendentibus et venis transversis 

 valde reticulatis profunde sulcatis, et hiuc subbuUatis, subtus concoloribus, rigide pubescentibus, costa 

 nervis venisque prominentibus, petiolo piloso, canaliculato, quam limbus 8plo breviore : inflorescentia 

 terminali ; pedunculo tereti, quam folium breviore, crebre multifloro ; pediceUis tenuissimis, apice 

 subito crassioribus, puberulis ; sepalis lanceolatis, 2 exterioribus longioribus, membranaceia, extus 

 puberulis, intus squamula munitisj corolla glabra; tubo cylindrico, quam calyx duplo longiore, imo 

 brevissime angustiore, intus infra faucem lineis 5 albido-pilosis signato ; segmentis carnosulis, lineari- 

 oblongis, extus sparse pilosulis ; staminibus ad contractionem basalem tubi insertis ; antheris longe 

 apiculatis, imo breviter bilobis ; disco bilobo, lobis rotundatis, ovariis 2 alternis et dimidio bre- 

 vioribus. In Venezuela : v. s. in herb. Mus. Brit. Tovar (Moritz) . 



This species differs from the preceding in its leaves subacute at the base and there con- 

 duplicate ; axils IJ in. apart ; leaves 2-2 J in. long, 1^-1^ in. broad, on petioles 3 lines 

 long ; peduncle 1 in. long ; head of flowers 1 in. in diameter ; pedicels 3 Lines long ; 

 sepals narrowly lanceolate, 2 lines long ; tube of corolla 3 lines long, with 5 pubescent 

 lines below the mouth ; segments 2| lines long, puberulous inside at the base, with a 

 dextrorse convolution. 



