ON SOTJTH-AMEEICAN APOCTNACE^. 183 



Peeictenia, nob. Sepala 5, subparva, oblonga, obtusa, valde imbricata, marginibus submembranaceisj 

 singula iutus squamulis 2 acute 2-dentatis munita. Corolla hypocrateriformis ; tubus longe et 

 anguste cylindricus, supra breviter ampliatus; segmenta 5, pro tertia parte trapeziformia, subito 

 angustata et longe horizontaHter protensa^ rotata, in sestivatione inflexa et intra tubum descendentia, 

 destrorsum convoluta. Stamina 5, pauUo supra basin tubi inserta ; filamenta brevia, retrorsum niveo- 

 pilosa ; antherce lineares, acutissimse, dorso pilosulse, imo in furcas 2 longe aristatas tenuissimas fissae. 

 Discus urceolatus, sub medium in lobes 5 oblongos obtusos pilosulos divisus. Ovaria 2, parva^ 

 globosa^ dense niveo-hispidulaj disco inclusa ; stylus brevis, validiusculus ; clavuncula incrassata, 5-sul- 

 cata, imo indusiata ; stigmata 2, parra, terminalia. 



Frutex Peruvianus subhumilis, erectus; siipnlxplurima, aristato-lanceolatee, ad nodes pectinatim sitcB ; 

 folia pauca, opposita, ovata, utrinque acuta, breviter petiolata ; racemi folio multibreviores, pauciflori, 

 simpliciter vel apposite ascillares et terminates, pedunculati ; floras speciosi, breviter pedicellati, brac- 

 teolati. 



Peeictenia stipeliaeiSj nob. : Echifes stipellaris, SprucCj MSS. Caule erecto, rigido, fistuloso, valde 

 compresso, profunde 4-sulcato, fasco, brevissime rufo-MrtellOj lenticeUis longis flavidis notato ; 

 axillis 3, floriferis, ad nodos dilatatos stipulis plurimis setaceo-linearibus pectinatim erectis munitis : 

 foliis late ovatis, imo subacutis, apice in acumen brevissimum obtusulum repente constrictiSj mar- 

 ginibus subundulatis, supra viridibus, ad costam et nervos pilosulisj nervis recte divaricatis et 

 arcuatim nexis, subtus flavide opacis, pubescentibus^ costa nervisque prominulis ; petiolis profunda 

 canaliculatis, quam stipulae baud longioribus : paniculis axiUaribus^ oppositis aut soUtariis, vel termina- 

 libus ; padunculo longiusculo, flavide tomentoso, tereti, apice incrassato et bic brevissime dicbotomo ; 

 ramis bibracteolatis, crebriter paucifloris ; floribus ut in cbar. generico. In Peruvia alta : v. s. in 

 herb, meo ex Tarapota (Spruce 4900). 



A very peculiar plant, with, much the habit of Dipladenia Gardneriana. Its erect 

 fistular stem, nearly 10 in, long, is bare at its base for the length of 6 in., the upper 

 portion being interrupted by 3 foliiferous nodes 1^, 1, and f in. apart respectively, each node 

 being furnished with a ring of 12 aristiform stipules 5-6 lines long (3 placed close together 

 on each side of the petiole) ; opposite leaves 5-5^ in. long 3-3f in. broad, on petioles 

 5 lines long ; opposite peduncles 1^2 in. long, 8-fl.owered ; 2 divaricating branches 

 4-4J lines long ; bracts half that length ; pedicels 3 or 4 close together, 3 lines long, 

 pilose, bibracteolate ; sepals 2^ lines long, obtuse, pilosulous on both sides, with 

 membranaceous margins ; corolla glabrous ; tube 16 lines long, 2 lines broad, swelling 

 towards the mouth to a breadth of 4 lines ; segments 10 lines long ; stamens inserted 

 1 line above the base of the tube ; slender anthers 4^ lines long ; filaments as long as 

 the aciculate basal prongs. 



A representation of this species, and an analysis of its flower, are given in Plate XXVIII. 



Mandevilla. 



This genus was established in 1840 by Dr. Lindley, upon a single species, the only 

 one hitherto known ; it was figured and described by him and Sir "Wm. Hooker, by both 

 from living plants. It was not adopted by De CandoUe ; but Endlicher accepted it. It 

 has more lately been acknowledged by the authors of the ' Genera Plantarum,' but upon 

 terms which cannot be admitted ; for they absorb into it the Amblyanthera of Miiller, a 

 valid genus, utterly discordant with it. Mcmdevilla is distinguished from the latter by 



