ON SOUTH-AMERICAN APOCYNACEX. 108 
enclosing many imbricate seeds on a narrow cylindrical placenta emanating from the 
ventral suture; seeds acutely oblong, 3 lines long, j line broad (immature) with 
pellucidly membranaceous margins, reddish, marked on the ventral face by the hilum, 
and without the indication of a coma; embryo unknown. 
A drawing of this species, with its floral and carpological analyses, is given in 
Plate XIII. s. The latter analysis agrees precisely with Mr. Bentham's description 
of his typical species in Hook. Journ. Bot. iii. 246. 
25. THYRSANTHUS MULTINERVIUS, nob.: Forsteronia multinervia, A. DC. l. c. p. 437; Müll. l c. p. 104: 
Wheeleria oppositifolia, Solander, Prim. Fl. Bras. p. 66. In Brasilia, prov. Rio de Janeiro: v. s. in 
herb. Mus. Brit. Rio de Janeiro (Solander, a.p. 1786), Rio Parahybuna (Gardner 5543). 
A species described by De Candolle from a plant collected by Gomez in the neigh- 
bourhood of Rio de Janeiro, with which the above specimens well agree. It is a climb- 
ing plant, with subflexuous, ferruginously pilose, lenticellate branches, the axils 1 in. 
apart; leaves ovate oblong, subobtuse at the base, acutely acuminate and mucronulate, 
submembranaceous, green with a reddish hue above, with about 12 pairs of parallel 
subascending nerves and transverse reticulated veins, sparsely pilose, especially on the 
nerves, with 2 distinct glands at the base of the midrib almost concealed by the hairs, 
more densely pilose beneath, 3-5 in. long, 1-13 in. broad, on pubescent petioles 2-3 lines 
long; inflorescence axillary on a subdeflexed peduncle 4 lines long, subcapitate, 1 in. in 
diameter, consisting of very numerous small flowers on very approximate branchlets 
bare at the base for 3 lines, each bearing about 8 crowded subspicate flowers on pubescent 
pedicels 1 line long, each furnished with a small lanceolate bract; sepals acutely oblong, 
puberulous, $ line long; corolla glabrous, 2 lines long; tube only j line long, bearing 
within a dense ring of white hairs; segments oblong, submembranaceous, of a red colour, 
smooth on both sides, a small tuft at the base of the median nerve, with dextrorse con- 
volution, the right inside margin involute; stamens inserted on the pilose ring; filaments 
very short; anthers oblong, small, shortly bicleft at the base, terminated by an inflexed 
SECH point; disk 5-lobed, as long as the 2 pilose oval ovaries. 
A species near T. bracteatus. 
26. THYRSANTHUS BRASILIENSIS, nob.: Forsteronia Brasiliensis, A. DC. l. c. p. 436; Müll. /. c. p. 102: 
Echites torquata, Cas. (?) Pl. Bras. n. 1601. In Brasilia: v. s. in hb. meo (n. 5057), Pernambuco 
(Gardner 1059). 
An erect shrub, 5 feet high, with slender, rufescent, glabrous, lenticellate branchlets, 
having axils 1 in. apart; leaves opposite, oblong, narrower below the middle, rounded at 
the base, suddenly contracted at the summit into an obtuse acumen, submembranaceous, 
glabrous, darkish green above, sulcate on the midrib, with 2 small glands at its base, 
nerves semi-immersed, somewhat paler beneath, with prominulent reddish nerves and 
reticulated veins, 12-23 in. long, 9-13 lines broad, on puberulous channelled petioles 
2 lines long; a subglobose panicle 6 lines in diameter, on a peduncle 3 lines Jong, 
bearing many small agglommerated flowers on pedicels 4 ling long, and an acute bract of 
the same length; sepals lanceolate, 1 line long; corolla 2 lines long, with a very short 
