180 ON SOUTH-AMERICAN APOCYNACEA. 
18. ANGADENIA ELLIPTICA, nob. In Brasilia: v. s. in herb. Mus. Brit. Paranaguá (Gardner 2663). 
A climbing species, with slender, striate, glabrous branchlets, with axils 1-2 in. 
apart ; leaves ovate-oblong, rounded at the base, suddenly and shortly acute at the sum- 
mit, submembranaceous, rufescent and shining above, with a pale slender midrib and 
nerves, palish green and opake beneath, obsoletely puberulous, with prominulent mid- 
rib and nerves, 23 in. long, 14 in. broad, on very slender petioles 4 lines long; raceme 
lateral, not more than 1 in. long, bearing about 5 flowers; sepals oblong, subobtuse, 
with pellucid margins; tube of corolla 5 lines long; segments oblong, 3 lines long; 
anthers acuminate, bifurcate at the base; disk urceolate, striate, denticulate on the 
margin. 
19. Ancapents BERTERII, nob.: Echites Berterii, A. DC. l. c. p. 447 ; Schlecht. in Linn. xxvi. p. 665: 
Rhabdadenia Berterii, Müll. in Linn. xxx. p. 485. In insula San Domingo: non vidi. 
A climbing plant, with retrorsely hispidulous branches ; leaves approximate, elliptic- 
obovate, subacute at both ends, mucronulate, coriaceous, glabrous, 11—2 in. long, 10-12 
lines broad, on petioles scarcely 2 lines long; raceme terminal, many-flowered, glabrous ; 
pedicels 5-6 lines long, with bracts 1 line long; sepals narrow, acutely lanceolate, 
24 lines long, each with 2 small inner scales; corolla yellowish, 13 in. long; tube nar- 
row below for the length of 4 lines, dilated above, pilose within the mouth; stamens 
inserted in the contraction of the tube, on a pilose ring; anthers biaristate; disk 
tubular, narrowed and crenate in the mouth, near 1 line long; style simple; clavuncle 
incrassate, 5-grooved, dilated at the base; stigmata small, slender. 
This plant appears to conform to Angadenia, on account of the shape of the disk and 
other characters ; it appears to have little affinity with Rhabdadenia. 
20. Ancapenta LINDENIANA, nob. : Rhabdadenia Lindeniana, inclus. var. angustifolia, Müll. l c. p. 438. 
In Cuba: v. s. in herb. meo (Linden 1699. No. 1700 et 1823 mihi invisa). 
A very slender climbing species, with axils 1-3 in. apart, and bearing two minute 
stipules on each face; the leaves are elliptic-oblong, roundish at the base, constricted at 
the summit into an acute subrecurving acumen, darkish opake green above, with revo- 
lute margins, sulcate along the midrib, nerves immersed, ferruginously opake beneath, 
with prominent midrib and prominulent fine nerves, 1-1} in. long, 4-7 lines broad, on 
scabridulous petioles 1-1} line long; panicle lateral, glabrous, on a bare, slender deflected 
peduncle 12-15 lines long, divided at its apex into 2 floriferous branches of nearly the 
same length, bearing each about 7 alternate flowers, on pedicels 3-5 lines long, with a 
small setaceous bract ; sepals acutely lanceolate, with membranaceous margins ; tube of 
corolla narrow at the base for one third of its length, swelling above, glabrous; segments 
dolabriform, simply folded dextrorsely in «estivation, expanding horizontally; stamens 
seated at the contraction of the tube; anthers cohering, dorsally hispidulous, acuminate, 
biaristate at the base; disk cylindrical, margin 5-crenate, concealing the 2 ovaries ; 
style slender; clavuncle incrassate, 5-grooved, with a dilated basal membrane; stig- 
mata short, terminal. 
In Linden’s No. 1700 and 1823 (which 1 have not seen) the leaves are somewhat larger, 
but all the characters are essentially the same. 
