66 ON SOUTH-AMERICAN APOCYNACEA. 
sulcated, compressed, fistulose, dark, puberulous, with axils 33 in. apart; leaves elliptic- 
oblong, acute at the base, a long narrow acumen at the apex, glabrous, entire, granularly 
seabrid on both sides, with about 12 pairs of diverging nerves, 43-6 in. long, 33-33 in. 
broad, on stout channelled petioles, fossated at the base and conjoined by a transverse 
ridge across the thickened nodes. The panicles are solitary and lateral at the axils, on a 
stout striated peduncle Y lines long, bearing 5-7 or more, closely congested flowers, 
on bracteolated pedicels 2-3 lines long; sepals oblong, 2i lines long; tube of corolla 
9 lines long; segments gibbously ovoid, 6 lines long; disk cylindrical, surrounding 
2 obovoid ovaries. 
3. ANACAMPTA ACUTISSIMA, nob.: Tabernemontana acutissima, Müll. Fl. Bras. p. 73. In insulis fluv. 
Amazonas : non vidi. 
This species is very near the preceding. Its branches are obtusely angular, sub- 
puberulous; leaves oblong-ovate, obtuse at the base, terminated by a long, narrow, cus- 
pidate acumen, have about 18 pairs of nerves 7 lines apart, are very glabrous, 62-8 in. 
long, 23-34 in. broad, on petioles 2-21 lines long (probably deeply fossated and conjoined 
by a transverse ridge); panicle lateral, on a peduncle 4$ lines long, bearing from 4 to 7 
flowers aggregated on pedicels as long as the calyx, and furnished with triangular, 
obtuse, puberulous, ciliated bracts; sepals obtusely oblong, glabrous, with ciliated mar- 
gins, provided with 4 basal scales inside; tube of corolla glabrous outside, pubescent 
within along 5 longitudinal lines in the middle, where the stamens are inserted; 
segments oblong, narrowed horizontally, outside furfuraceous at the base, beyond 
glabrous, convoluted sinistrorsely in estivation; disk acutely 5-angled, surrounding the 
ovaries. 
4. ANACAMPTA LONGIFOLIA, nob. : Tabernemontana longifolia, Benth. Hook. Journ. Bot. iii. 243; A. DC. 
l. c. p.368. In Guiana: v. s. in herb. meo et alior. Guiana Brit. (Schomb. 292 et 41 bis), Surinam 
(Mig. sub T. oblongifolia), Cayenne (Van Rohr, sub T. triquetra). 
This must not be confounded with another 41 of Schomburgk's plants, which is 
Thyrsanthus laurifolius. The branchlets are stout, angular, striolated, subfistulose, with 
axils 14-2 in. apart; its subcuneate oblong leaves, acuminate at the summit, are 
5-10 in. long, 2-23 in. broad, on stout deeply fossate petioles 3 lines long, con- 
joined across the axils by a transverse ridge; inflorescence terminal at the end of a 
very short 2-leaved branchlet, so that it appears almost axillary ; peduncle stout, 1 in. 
long, divided at its summit into two erect stout portions 1 in. long, each bearing about 
20 very closely alternate flowers, most of which are caducous; pedicels 3-4 lines long, 
issuing from as many imbricating, obsoletely puberulous, oblong, oval bracts 2 lines 
long, mostly caducous; sepals oblong, obtuse, 2 lines long, each with a 4-dentate scale 
within; tube of corolla cylindrical, 9 lines long, contracted at the mouth; segments 
oblong, gibbous, (expanded) 5 lines long, 4 lines broad, sinistrorsely convoluted, their 
extremities introflexed and descending into the mouth of the tube; stamens inserted 
above the middle of the tube; ovaries 2, oblong, pointed, free, and half-enclosed within a 
fieshy, cylindrical, 5-grooved, 5-crenate disk; style, clavuncle, and stigmata as in the 
generic character. 
