176 ON SOUTH-AMERICAN APOCYNACEX. 
lines long, narrow below for one third of its length; segments dolabriform, 43 lines long; 
stamens seated on a pilose ring at the constriction of the tube; anthers slender, linear, 
acute, with 2 short, subdivergent, basal prongs; disk urceolate, fleshy, denticulate on the 
margin, and nearly concealing the 2 free ovaries. 
7. ANGADENIA LATIFOLIA, nob. : Anisolobus Amazonicus, var. latifolius, Müll. l. c. p. 114: Odontadenia, sp. 
Benth. MSS. In Brasilia, v. s. in herb. meo, Panuré, Rio Uahupes (Spruce 2503). 
A species very distinct from the preceding. Its branches are compressed, opake, sub- 
striate, dilated at the axils, which are 13 in. apart, and thickened by a transverse ridge, 
bearing 2 or more acute stipules, often caducous; leaves very broadly ovate, rounded, but 
shortly and very suddenly acute upon the petiole, roundish towards the summit and 
suddenly constrieted into an obtusely cuspidate acumen, rigidly chartaceous, with sub- 
undulated margins, opakely fuscous above, with curving immersed nerves, and transverse 
veins very finely retieulated between them, paler and ferruginously opake beneath, with 
prominent reddish nerves and veins, 4-44 in. long, 21-3 in. broad, on curving, stoutish, 
channelled petioles 5-6 lines long; terminal or subaxillary panicles on peduncles 5-8 lines 
long, each bearing about 10 flowers on slender pedicels 9 lines long; sepals ovate, sub- 
acute, unequal, very imbricate, 2 lines long; tube of corolla subpuberulous, narrowed 
below for half its length, slightly swelling above, 7 lines long; segments obliquely ovate, 
24 lines long; disk cupular, cleft halfway into 5 subacute lobes shorter than the 2 ovaries. 
The species differs from 4. Amazonica in its much broader, less acuminate, more rigid 
leaves, and in its geminate terminal panicles bearing fewer flowers. 
8. ANGADENIA SPRUCEI, nob. : Anisolobus Sprucei, Müll. l. c. p. 114: Odontadenia, sp., Benth. MSS. 
In Amazonas : v. s. in herb. meo prope Panuré, Rio Uahupes (Spruce 2555). 
A species near the two preceding, with stout straight branches, having their axils 24-33 
in. apart, bearing on each face 2-4 lanceolate membranaceous stipules 1 line long, very 
caducous; leaves oblong-elliptic, gradually narrowing towards the base from the middle, 
suddenly contracted at the more rounded summit into a sublinear obtuse acumen, char- 
taceous, with subrevolute margins, reddish fuscous and opake above, with black midrib 
and immersed nerves, ochreous-brown below, midrib and nerves reddish, subprominulent, 
with closely transverse reticulate veins, 4-5 in. long, 14-2 in. broad, on petioles 3-4 
lines long; panicles axillary, single or geminate and terminal, on peduncles 9-15 lines 
long, trichotomously branched, each branch bearing 2-3 alternate flowers, on pedicels 
4-6 lines long, furnished with 2 small bracts; sepals broadly ovate, very imbricate, 
ciliate on the margins, 2 lines long; tube of corolla 10 lines long, the contracted basal 
portion of the tube being 3 lines jong ; segments broadly oblong, 4 lines long; stamens 
inserted at the contraction of the ee disk urceolar, with many denticulate teeth on 
the margin, half the length of 2 conical oblong ovaries. 
A drawing of this species, and an analysis of its flower, are given in Plate XXVII. A. 
9. ANGADENIA COGNATA, nob.: Anisolobus cognatus, Müll. l. c. p. 113: Echites cognata, Stadelm. Bot- 
Zeit. 1841, p. 79; A. DC. l. c: p. 470. In Brasilia, Rio Japuré: non vidi. 
A species with glabrous branchlets ; leaves ovate or oblong-ovate, subacute at the base, 
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