ON SOUTH-AMERICAN APOCYNACER. 121 
4. REABDADENIA BIFLORA, Müll. Fl. Bras. £. c. p. 175: Echites biflora, Jacq. Amer. p. 30, tab. 21; 
A. DC. Prodr. viii. p. 450; Griseb. Fl. Br. W. Ind. p. 415: Echites Ehrenbergii, Schlect. 
Linn. xxvi. 666: Rhabdadenia Ehrenbergii, Müll. Linn. xxx. 454. In America tropicali: v. s. in 
hb. Mus. Brit. ins. Carib. (Jacquin, typ.) ; Cayenne (Sagot 387) ; Manglares de Sisal (Schott 812) ; 
Jamaica (Dr. Wright). 
A shrub, yielding a lactescent juice, with scandent, slender, fistulous branches, often 
climbing to a height of 20 feet; branches with axils 2-3 in. apart; leaves very patent, 
obovate, acute at the base, rounded and mucronate at the apex, 2-3 in. long, 1-14 in. 
broad, on petioles 4-6 lines long; the peduncle of the axillary inflorescence is 6 lines 
long, bearing 2 apical pedicels 6 lines long, supported by acute bracteoles; sepals sub- 
equal, oval, 3 lines long, 2 lines broad, marked by parallel nerves and reticulated veins; 
the contracted portion of the tube of the corolla is 8 lines long, above it is funnel- 
shaped and 8 lines long, 6 lines broad in the mouth; segments dolabriform, 9 lines 
long, 7 lines broad, with simple dextrorse convolution ; stamens seated on a pilose ring 
in the mouth of the contracted portion of the tube; filaments short, partially adnate ; 
anthers obtusely bifid at the base, acute and pilose at the apex; disk of 5 erect ovate 
lobes, scarcely connate at the base, as long as the 2 free ovaries; style slender ; clavuncle 
ovate, 5-angular, 5-glandular, expanded at its base into a membranaceous umbraculiform 
appendage; 2 stigmata, small, terminal; 2 follicles, terete, suberect, 31 in. long, 2 lines 
thick, subcohering at the summit; seeds linear, terminated at the apex by a long brush- 
shaped caudal rostrum, as in Rh. PoAlii. 
5. RHABDADENIA CAMPESTRIS, nob.: Echites campestris, Vell. Flor. Flum. p. 113, Icon. iii. tab. 43; 
A. DC. Prodr. viii. 475 : Amblyanthera campestris, Müll. l. c. p. 149. Brasilia, prov. Rio de Janeiro 
(Velloz, in apricis) : non vidi. 
This is a subscandent species, with stoutish branches, and axils 2 in. apart; leaves 
elliptic, gradually acute towards the summit, narrower below the middle, rounded or 
obsoletely cordate at the base, hirsute above, pubescent beneath, 4-5 in. long, 2-22 in. 
broad, on petioles 3 lines long; the inflorescence is terminal at the end of very young 
branchlets, consisting of a stoutish pubescent peduncle 4 lines long, bearing a single 
sessile orange-coloured flower; the sepals are lanceolate, pubescent, 6 lines long; the 
funnel-shaped tube of the corolla is contracted cylindrically at the base to a diameter of 
3 lines, swelling upwards to the mouth, which is 6 lines broad, and is 14 in. long, 
pubescent outside; segments obliquely rounded, 11 lines long and broad, dextrorsely 
convolute; the 5 lobes of the disk are free, nearly as long as the ovaries. 
6. RHABDADENIA MADIDA, nob.: Echites madida, Vell. Fl. Flum. 112, Icon. iii. tab. 42; A. DC. L c. 
p. 474: Amblyanthera madida, Müll. l. c..p. 150. In Brasilia, prov. Rio de Janeiro australiore in 
via Pacienca ad San Paulo tendens (Velloz, in sylvis madidis) : non vidi. 
A species, without doubt, belonging to this genus, and near R. Pohlii, differing in its 
broader leaves and solitary flower. In the latter species the basal lobes of the leaves 
overlap one another, hiding the sinus; in this species these lobes are rounder and broadly 
gaping. It is a climbing glabrous plant, with slender twining branches, having its 
axils about 3 in. apart; the leaves are oblong, broadly cordate at the hase, and terminate 
R 
