ON SOUTH-AMERICAN APOCYNACEZR, 159 
ring; anthers purplish, coherent, with 2 parallel, obtuse, basal spurs ; follicles 2, erect, 
incurved, slender, terete, 21-3 in. long, li'line thick; immature seeds 1i line long, 
very compressed, obspathulate, fixed round a thickish placenta, with a deciduous coma 
of few silky hairs the length of the testa. 
A drawing of this species, in flower and fruit, with the analysis of its flower and a 
figure of its seed, are given in Plate XXIII. 
2. MICRADENIA ATROVIOLACEA, nob. : Echites atroviolacea, Stadelm. Bot. Zeit. 1841, p.75; Gardn. Lond. 
Journ. Bot. i. 544: Dipladenia atroviolacea, A. DC. L c. viii. 484; Müll. Flor. Bras. xxvi. p. 127. 
In Brasilia prov. Rio de Janeiro, in montibus circa Tejuca, ad Pedra Bonita: v. v. et sicc. in herb. 
meo (3136) ; v. s. in herb. Mus. Brit. (Gardner 249, ex eodem loco). 
I found this plant on one of the spurs of the Tejuca range, in company with Gardner, 
in 1836. It is a low, bushy plant, growing on rocky ground, with many, rather slender 
subsarmentous branches, having approximate axils 4—6 lines apart, charged between 
the petioles with several small warty excrescences, as in the former species; the leaves 
are lanceolate-oblong, subacute at the base, gradually or suddenly constricted near the 
apex into a narrow acumen, subcoriaceous, pale green above, with a prominent fine midrib 
and scarcely visible nerves, paler opake beneath, with a reddish prominulent midrib and 
immersed nerves, 11-2 in. long, 6 lines broad, on slender channelled petioles 3-5 lines long, 
the leaves being erect and much imbricated near the ends of the branchlets; racemes 
axillary, pedunculate, bearing about 4 alternate flowers, on slender, spirally twisted 
pedicels 6-8 lines long; sepals acuminately subulate, with membranaceous margins, 
21 lines long; tube of corolla 18 lines long, narrowed and scarlet at the base for a 
length of 8 lines, above that suddenly bell-shaped cylindrically, where it is white, 
with reddish irregular stripes; segments rhomboid-oblong, of a dark, dull red-brown 
colour, 8 lines long, 6 lines broad, expanding above the mouth ; stamens nearly sessile 
at the contraction of the tube; anthers purple, cohering, each with 2 obtuse, parallel, 
basal spurs. 
Var. ovata, nob.: Echites atropurpurea, Lindley, in Paxton Mag. Bot. (1842); Bot. 
Reg. vol. xxix. (1843), tab. 27; A. DO. Z. c. p. 486. It differs in its more ovate leaves, 
14-14 in. long, 9-11 lines broad, on slender petioles 5-6 lines long; its flowers are 
exactly as those above described; so that the different colouring given by Lindley must 
be due to hot-house cultivation. 
I found this on the same spot and also at Pavuna, near Iguassu, in the same province. 
3. Micrapenta NopvLOsa, nob. : Dipladenia crassinoda, Lindley (non Gardner), Bot. Reg. xxx. tab. 64: 
Dipladenia Martiana, var. glabra, Müll. l. c. p. 128. In Brasilia: v. s. in herb. Mus. Brit. prov. 
Minas Geraés, ad Pico de Itabira (Sellow) : non vidi. 
A climbing plant, with very flexuose, hairy, dichotomous branches, having axils 2-4, in. 
apart, which are much incrassate and charged on each face between the petioles with 
about 6 subulate, reflexed, warty glands ; leaves ovate-elliptic, rounded at the base, with a 
short acute acumen, thinly chartaceous, slightly revolute on the margin, olive-green 
above, opake, obsoletely puberulous, shortly hispid on the deeply sulcate midrib, with 
about 14 pairs of patent arcuately conjoined nerves, with others shorter and inter- 
