154 ON SOUTH-AMERICAN APOCYNACEX. 
beneath, with about 10 pairs of somewhat patent nerves conjoined near the margins, 
with others shorter and intermediate, 23-3 in. long, 2-21 in. broad, on broad pubescent 
petioles 1 line long; on the basal portion are 2 pairs of opposite folioles (well shown 
by Velloz) which are 6-10 lines long, 24-3 lines broad. The raceme is terminal, 4-5 in. 
long, erect, bearing 1 terminal and 4 opposite flowers about 1 in. apart, on pedicels 
6 lines long, all pubescent; sepals lanceolate, acuminate, 4 lines long, 1j line broad, 
puberulous, each with 3 acuminate inner scales; corolla puberulous, pale red; tube 
13 in. long, narrowly contracted at the base for 5 lines, funnel-shaped above; segments 
roundly dolabriform, acute at one angle, 14 in. long, 1 in. broad; stamens seated on a 
pilose ring at the constriction of the tube; filaments 4 line long; anthers 33 lines long, 
obtusely emarginate at the base; disk of 2 rounded lobes, as broad and long as the 
ovaries; 2 follicles, erect, terete, 5-6 in. long; seeds linear, 5 lines long, surmounted by 
a coma 7 lines long. : 
A drawing of this plant in flower and in fruit, with an analysis of its flower, and a 
figure of the seed, are shown in Plate XXII. 
2. DIPLADENIA VELUTINA, A. DC. /. c. p. 483: Dipladenia gentianoides, var. velutina, Müll. l. c. p. 124: 
Echites velutina, Stadelm. Bot. Zeit. 1841, p. 72. In Brasilia, prov. São Paulo: v. s. in herb. meo, 
prov. S. Paulo (Ackermann). 
A species with much the habit of the preceding. It has an erect cano-hirsute, fistu- 
lous stem, near a foot high, 13 line thick, bearing about 3 pairs of opposite leaves at the 
simple axils which are 3—4 in. apart; leaves ovate, rounded at the base, mucronate at 
the apex, chartaceous, with many parallel nerves, asin D. illustris, niveo-pubescent above, 
cano-hirsute beneath, especially on the midrib and nerves, 2-23 in. long, 14-2 in. broad, 
on a broad pilose petiole 14-2 lines long; raceme terminal, erect, lanately pubescent, 
on a peduncle 1 in. long, bearing on its summit 3 flowers on pedicels 6 lines long; sepals 
acuminate, pubescent, 4 lines long; tube of corolla 1 in. long, narrowly cylindrical 
below for half of its length, funnel-shaped above; segments dolabriform, 6 lines long. 
3. DiPLADENIA SANCTA, A. DC. l. c. p. 484; Müll. Z. c. p. 126: Echites sancta, Stadelm. l. c. p. 59. In 
Brasilia, prov. Bahia, ad Monte Sancta: v. s. in herb. meo, prov. Bahia ad Serra de Piedade 
(Ackermann). 
Müller, who did not see the plant, states that its stem is 3-4 feet high, evidently a 
mistake for as many inches ; for in two of my specimens it is only 3 in., and in the other 
7 in. high, being erect, compressed, fistulous, 2 lines broad, retrorsely pilose above, more 
glabrous below, with axils 2 in. apart; leaves opposite, suberect, broadly ovate, sub- 
cordate at the base, roundish at the apex, and suddenly subacute, mucronulate, fuscous 
greenish above, opake, with subrevolute margins, 10 pairs of divergent nerves arcuately 
conjoined, with as many shorter and intermediate, a little paler and brownish beneath, 
corrugulate, somewhat glabrous, with long patent white hairs along the midrib, 23-44 
in. long, 12-21 in. broad, on stout hairy petioles 1 line long; raceme terminal, 2-3 in. 
long, the peduncle, patently pubescent, bearing laxly about 6 alternate flowers on 
stoutish pedicels 5 lines long; 2-3-bracteolate at the base; sepals linear, very acumi- 
nate, 4-5 lines long, reddish, membranaceous, each with 3 small acute basal scales; 
