ON SOUTH-AMERICAN APOCYNACEA. 155 
corolla whitish red below, red above, elabrous; tube 11 lines lone g, narrowly cylindrical 
for half its length, funnel-shaped in the upper portion, pubescent within the mouth; 
segments dolabriform, 10 lines long; stamens seated on a pilose ring at the constriction 
of the tube; filaments capillary, barbate at the summit, 3 lines long; anthers linear 
acute, obtusely 2-lobed at the base; disk of 2 lobes, as broad and long as the 2 ovaries; 
style slender, retrorsely barbate; 2 follicles erect, terete, scarcely torulose, glabrous, 
4-47 in. long, 1} line broad; seeds sigmoid, scabrid, 21 lines long, surmounted by a 
yellow coma of equal length. 
4. DipLaDENtA scaBRa, Müll. /. c. p. 128: Dipladenia illustris, var. glabra, Müll. 1. c. p. 125, tab. 38. 
In Brasilia austr.: v. s. in herb. meo, Tucundiva, prov. Sáo Paulo (Weir 369). 
An erect species, with a straight, subglabrous, fistulous stem, scarcely more than 
1 line thick, with axils about 4 in. apart; leaves subimbricate, suberect, obovate-oblong, 
slightly cordate at the base, roundish at the apex, with a mucronate acumen, sub- 
chartaceous, with a slightly revolute margin, opake green above, minutely scabrid, 
midrib prominent, with 10-12 pairs of divergent arcuately conjoined nerves, and others 
shorter intermediate, concolorous beneath, and nearly glabrous, 2-2} in. long, 1-1] in. 
broad, on petioles 1 line long; raceme terminal, 5 in. long, on a subglabrous peduncle, 
bare at the base for 2 in., bearing upwards of 6-8 alternate flowers on stoutish pedicels 
6 lines long, supported by 1 or 2 linear-lanceolate bracts 4-5 lines long; sepals linear- 
Relate; membranaceous, 6 lines long, each with 3-4 minute acute inner scales; tube 
of corolla 9 lines long, narrowly cylindrical at the base for half its length, funnel-shaped 
above, glabrous outside, pubescent within; segments oblong, acute, inequilateral, 9 lines 
long and broad ; stamens seated on a niveous pilose ring in the contraction of the tube, 
3 lines long; filaments short, pilose; anthers linear acute, obtusely bilobed at the base; 
the two lobes of the disk large, as long and as broad as the two ovaries. 
My specimen agrees exactly with the description and drawing of Miller, except in its 
leaves being a trifle broader; it certainly offers no resemblance to D. illustris; it 
is represented by Müller as growing out of a napiform tuber 5 in. long and 1j in. 
thick. 
5. DIPLADENIA GARDNERIANA, A. DC. Le, p. 483: Dipladenia illustris, var. pubescens, Müll. l. c. p. 125. 
In Brasilia: v. s. in herb. meo, prov. Goyaz (Gardn. 3311). 
This species offers little resemblance to D. illustris. It has an erect, AE fistu- 
lose, glabrous stem, apparently 8 in. high, with axils 2 in. apart; leaves few, opposite, 
oblong, roundish and subcordate at the base, gradually acute towards the apex, thinly 
chartaceous, shortly hirtulous on both sides, concolorous, with a prominent sulcate mid- 
rib and many divergent immersed nerves, 4-5 in. long, 14-24 in. broad, on petioles 1 
line long; raceme terminal, 7 in. long; peduncle bare at the base for 3j in., bearing 
upwards about 4 alternate flowers, on bracteated pedicels 6 lines long; sepals subulate, 
acuminate, 5 lines long; tube of corolla 1 in. long, narrowly cylindrical for half its length, 
x 2 
