174 ON SOUTH-AMERICAN APOCYNACEEX. 
glauco-velutinous beneath, 33-54 in. long, 21-81 in. broad, on petioles 2-3 lines long; 
racemes axillary and terminal, opposite, about as long as the leaves, on a very slender 
flexuous peduncle bare at the base for the length of 1 in., bearing above 5 to 8 alternate, 
rather distant flowers on slender pedicels 6-8 lines long, twisted, and bracteolate at the 
base; sepals oblong, imbricate, 2 lines long; corolla hypocrateriform ; tube cylindrical, 
slightly contracted in the middle, 13 in. long; segments rotate, dolabriform, 9 lines long, 
4 lines broad; stamens seated a little above the middle of the tube, and reaching the 
mouth, with 2 short divergent prongs at the base; disk urceolate, fleshy, with very numerous 
fine denticulations on the margin, some few of them deeper than the others, shorter than 
the 2 conical, oblong, glabrous ovaries. 
2. ANGADENIA MAJUSCULA, nob.: Odontadenia hypoglauca, Müll. (in parte) l. c. p. 118, tab. 35 a. fig. 1. 
In Amazonas: v. s. in herb. Mus. Brit. Santarem (Spruce 696). 
A species distinct from the preceding. It has stouter, flexuous branches, with axils 
4 in. apart; leaves ovate-oblong, deeply cordate at the base, rather obtuse and suddenly 
mucronate at the summit, margins subrevolute, of a palish green above, but pubescent 
on the midrib and nerves, of which there are 10 pairs divergent and prominulous, furnished 
with transversely reticulate immersed veins, beneath very opake and yellowish glaucous 
on the midrib and nerves, 3-6 in. long, 13-32 in. broad, with a basal sinus 2-5 lines deep, 
on glaucous channelled petioles 3-6 lines long; racemes axillary, opposite, on stoutish 
peduncles naked at the base for 1} in., bearingabove about 8 opposite flowers on very 
slender pedicels 7 lines long; sepals ovate, subacute, 24-3 lines long, each furnished with 
2 bifid internal scales; tube of corolla 11 lines long, narrowly cylindrical, contracted in 
the middle; segments dolabriform, 8 lines long; stamens seated in the contraction of the 
tube; anthers acuminate, with 2, somewhat divergent, basal prongs; disk shortly cleft ` 
into 5 or 10 striate, denticulate lobes, as long as the 2 glabrous ovaries. 
3. ANGADENIA SYLVESTRIS, nob. : Echites sylvestris, A. DC. l. c. p. 464: Echites grandiflora, Stadelm. 
(non Meyer) Bot. Zeit. 1841, p. 49: Odontadenia sylvestris, Müll. (in parte) l. c. p. 117 (excl. tab. 
354. fig. 2). In Brasilia, Rio Japuré in sylvis (Martius) : non vidi. 
This species is evidently not a true Odontadenia, but, like the O. hypoglauca of Müller, 
belongs to this group. DeCandolle described it from the Echites grandiflora of Stadelmeyer, 
who wrongly confounded it with Meyer's plant of the same name from Guiana. The 
plant seems to have been collected by Martius, near the river J apuré, a region south of 
the Rio Negro. Müller united it with another plant collected by Sagot in Guiana, which 
is the Echites coriacea of Bentham, here described under the following species; we must 
therefore reject the specifie character and the floral analysis of Müller, and trust wholly 
to that given by DeCandolle. Its branches are obtusely 4-angled, and their axils remote; 
the leaves are cuneately obovate, with a short, mucronate acumen, membranaceous, 
marked beneath with prominent midrib and nerves and obliquely transverse veins, 5-8 
in. long, 2-4 in. broad, on petioles less than 1 inch long; panicles axillary, shorter than 
the leaves, on peduncles often 3 in. long, bearing many flowers on pedicels 3 lines long, 
minutely bracteolate ; sepals obtusely ovate, 3 lines long, with inner trifid scales ; corolla 
2; in. long, yellowish red, its tube somewhat ventricose within the calyx, narrowly cylin- 
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