A 
—— 
ON SOUTH-AMERICAN APOCYNACER. 255 
at its base, rises laterally from the node, and is furnished above with several laxly 
alternate flowers upon longish pedicels, thus contrasting ostensibly with Prestonia, 
where the peduncle, always branching, rises out of a cluster of stipuloid scales, and 
bears numerous almost sessile flowers generally aggregated in capitate heads; the disk 
also consists of 5 free fleshy erect lobes (not combined into a cylindrical cup); the 2 
follicles are always divaricately separate, long, narrow, and torulose (not combined into 
a long, stout, 2-celled capsule). Other minor differences exist, as the following amended 
diagnosis will show. 
Hamanicryon, Lindl. (char. emend.) : Prestonia (in parte) Benth. & Hook. (non aliorum). Sepala aut 
minora et lineari-acuminata, vel majora et acute ovata, membranacea, intus squamula acute lineari 
apice 3-dentata munita. Corolla hypocrateriformis; tubus latiuscule cylindricus, fauce subcon- 
strictus, et ibi annulo integro signatus, remotiuscule sub ore segmentis alternis, appendicibus 5 anguste | 
linearibus bidentieulatis apice exsertis instructus; segmenta obtuse insequilatera et deltoidea, tubo 
subbreviora, dextrorsum convoluta. Stamina 5, e pilis retrorsis in cristulas totidem, medio tubi inserta, 
apice vix exserta, in conum subcohzrentia; filamenta brevia, retrorsum ciliata; anthere lineari- 
acuminate, imo divergenter biaristatwe. Discus e lobis 5, erectis, obtuse oblongis, intus canaliculatis, 
carnosis constans; ovaria 2, ovata, disco «equilonga; stylus tenuis; clavuncula incrassata, imo 
indusiata ; stigmata 2, parva, ovata, terminalia. Folliculi 2, longi, teretes, subtorulosi, plus minusve 
divergentes. Semina plurima, oblonga, dorso costata, ventre raphe longitudinali signata. Embryo in 
albumine ;. cotyledonibus 2, oblongis, foliaceis; radicula tenuiter tereti supera his breviore. 
Suffrutices Americe meridionalis scandentes ; rami cum axillis remotis nude dilatatis; folia ob- 
longa, opposita, sepe subtranslucentia et eleganter venosa, petiolata ; inflorescentia laterali, simpliciter 
longe pedunculata ; flores laxe alterni, tenuiter pedicellati et bracteolati. 
1. Hxwanicryos venosum, Lindl, Trans. Hort. Soc. vi. p. 71: Hemadictyon nutans, A. DC. Prodr. viii. 
p. 426: Echites nutans, Anderson, Bot. Mag. li. tab. 2473; Griseb. Fl. Br. W. Ind. p. 413: Echites 
sanguinolenta, Juss., Tussac. Fl. Ant. i. tab. 11; A. DC. l c. p. 413. In Amer. merid. et Antillis : 
v. s. in herb. Mus. Brit. Amer. merid. (Shakespear, sub Tabernemontana axillaris) . 
A climbing species with smooth branches; leaves oblong-ovate, acute at the base, nar- 
rowing upwards into an acute reflected point, submembranaceous or .chartaceous, sub- 
translucent, very glabrous, with about 9 pairs of reddish fine nerves arcuately conjoined, 
with reticulated veins, margins scarcely revolute, pale-green above, yellowish - opake 
beneath, with slightly prominulent midrib and nerves, 4-10 in. long, 11-21 in. broad, 
on slender petioles 2-4 lines long conjoined by a transverse ridge across the node; 
racemes solitary and lateral at each axil, 23 in. long, on a peduncle bare at the base for 
6 lines, bearing above several alternate flowers on pedicels 3 lines long, based by small 
bracteoles ; sepals spathulate-lanceolate, 4 lines long, with an inner linear-pointed, denti- 
culate scale; corolla greenish-yellow, its tube 7-8 lines long, having a narrow ring in 
the mouth, and below it 5 subulate appendages a little exserted ; segments ovate, 
obtusely inequilateral, crispate and subreflexed, 4 lines long; disk half-cleft into 5 lobes, 
a little shorter than the 2 ovaries. 
3. Hamaptcrron EXSERTUM, A. DC. Z. c. p. 426; Schlecht. Linn. xxvi. 661. In Venezuela, ad Caracas : 
non vidi. 3 ; 
A climbing species, with slender pubescent branches; leaves elliptic-oblong, acute at 
