ON SOUTH-AMERICAN APOCYNACER. 183 
PERICTENIA, nob. Sepala 5, subparva, oblonga, obtusa, valde imbricata, marginibus submembranaceis, 
singula intus squamulis 2 acute 2-dentatis munita. Corolla hypocrateriformis ; tubus longe et 
anguste cylindrieus, supra breviter ampliatus; segmenta 5, pro tertia parte trapeziformia, subito 
angustata et Jonge horizontaliter protensa, rotata, in estivatione inflexa et intra tubum descendentia, 
dextrorsum convoluta. Stamina 5, paullo supra basin tubi inserta; filamenta brevia, retrorsum niveo- 
pilosa ; anthere lineares, acutissimee, dorso pilosul, imo in furcas 2 longe aristatas tenuissimas fisse. 
Discus urceolatus, sub medium in lobos 5 oblongos obtusos pilosulos divisus. Ovaria 2, parva, 
globosa, dense niveo-hispidula, disco inclusa ; stylus brevis, validiusculus ; clavuncula incrassata, 5-sul- 
cata, imo indusiata ; stigmata 2, parva, terminalia. 
Frutex Peruvianus subhumilis, erectus; stipule plurime, aristato-lanceolate, ad nodos pectinatim site ; 
folia pauca, opposita, ovata, utrinque acuta, breviter petiolata ; racemi folio multibreviores, pauciflori, 
simpliciter vel opposite axillares et terminales, pedunculati; flores speciosi, breviter pedicellati, brac- 
teolati. 
PERICTENIA STIPELLARIS, nob.: Echites stipellaris, Spruce, MSS. Caule erecto, rigido, fistuloso, valde 
compresso, profunde 4-sulcato, fusco, brevissime rufo-hirtello, lenticellis longis flavidis notato ; 
axillis 3, floriferis, ad nodos dilatatos stipulis plurimis setaceo-linearibus pectinatim erectis munitis : 
folis late ovatis, imo subacutis, apice in acumen brevissimum obtusulum repente constrictis, mar- 
ginibus subundulatis, supra viridibus, ad costam et nervos pilosulis, nervis recte divaricatis et 
arcuatim nexis, subtus flavide opacis, pubescentibus, costa nervisque prominulis ; petiolis profunde 
canaliculatis, quam stipule haud longioribus: paniculis axillaribus, oppositis aut solitariis, vel termina- 
libus ; pedunculo longiusculo, flavide tomentoso, tereti, apice incrassato et hic brevissime dichotomo ; 
ramis bibracteolatis, crebriter paucifloris ; floribus ut in char. 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 13, 1, and ¿ 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 5-53 in. long 3-33 in. broad, on petioles 
5 lines long; opposite peduncles 13-2 in. long, 8-flowered; 2 divaricating branches 
4-4) 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 43 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 Candolle; 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 Müller, a 
valid genus, utterly discordant with it. Mandevilla is distinguished from the latter by 
