168 ON SOUTH-AMERICAN APOCYNACEE. 
4. Prestoniopsis FENDLERI, nob.: Dipladenia Fendleri, Müll. Linn. xxx. 417. In Venezuela, Tovar 
(Fendler 1030) : non vidi. 
A species near the two preceding. It isa subscandent shrub, with glabrous verrucose 
branches, the younger ones puberulous; leaves broadly ovate or elliptic, cordate at the 
base, shortly euspidate at the apex, glabrous above, with 6-8 pairs of divergent nerves 
and reticulated veins, incano-tomentous beneath, 22-41 in. long, 13-3 in. broad, on 
petioles 3-12 in. long; raceme lateral or subterminal, on a peduncle 2 in. long, bearing 
a head of densely aggregated, small, pubescent flowers, on pedicels 5-7 lines long, sup- 
ported by narrow linear-lanceolate bracts of the same length; sepals linear-lanceolate, 
imbricate, pubescent, 34 lines long, each with a basal 2-3fid scale; corolla not yet ex- 
panded, nearly 1 in. long; tube pubescent, contracted near the base, where it is stamini- 
gerous, pubescent in the mouth; segments rather narrow, elongate, with ciliated mar- 
gins, 13 line broad; disk 2 ovate lobes, half as long as the 2 ovaries. 
ANISOLOBUS. 
A genus established by DeCandolle in 1844. Its chief distinctive character (whence 
its name) is a large calyx of 5 unequal, oblong, obtuse, erect, membranaceous sepals, 
quincuncially imbricate, the 2 outer ones being smaller. Müller, regardless of this 
prominent feature, described and figured some of its species as belonging to Odontadenia, 
a genus with which he was evidently unacquainted. This mistake was afterwards copied 
by the authors of the ‘Genera Plantarum’ (ii. 723), who, without sufficient reflection, 
absorbed Anisolobus into Odontadenia ; the latter is a genus widely remote, with which 
Anisolobus can claim no affinity whatever. It was founded by Mr. Bentham, in 1841, 
upon very sound data. 
The generic character of Anisolobus is here remodelled from the careful analysis of those 
species which I have been able to examine. 
Antsotosus, A. DC.: Müll. (in parte). Calyx majusculus. Sepala 5, valde inequalia, quorum 2 exte- 
riora minora, quincuncialiter et insigniter imbricata, oblonga, obtusa, membranacea, imo crassiora, 
intus squamulis 2 bidentatis singulatim munita. Corolla tubulosa ; tubus longiusculus, infra medium 
angustatus, superne infundibuliformis; segmenta falcatim dolabriformia, in zstivatione pro tertia 
parte erecta, angulo sinistro acutata, dehinc subito introflexa, intra tubum descendentia, apicibus 
antheras attingentes, demum expansa et dextrorsum conyoluta. Stamina 5, ad constrictionem 
tubi inserta, inclusa; filamenta subbrevia, linearia, membranacea; anthere anguste lineares, cus- 
pidatz, imo in furcas 2 longiusculas fisse. Discus urceolatus, margine denticulatus, ovaria ssepius 
occultans. Ovaria 2, oblonga; stylus tenuis; clavuncula incrassata, pentagone cylindrica, glandu- 
losa, ad antheras conglutinata, imo indusiata; stigmata 2, parva, oblonga, terminalia. Folliculi 2, 
oblongi, crassiusculi, fusiformes, horizontaliter divergentes, glabri vel pubescentes, sutura ventrali 
dehiscentes ; semina plurima, linearia, coma sericea 3-4plo longiore coronata. 
Suffrutices Americe meridionalis, sepius scandentes ; rami ad nodos stipulacei ; folia opposita, ob- 
longa, breviter petiolata ; racemi vel panicule laterales aut terminales, sepe geminati; flores pedicellati 
et bracteolati. 
SLED ae aN rea NE ep E ORT MR HA AR A oe age Te Wd O ` Aaen 
