100 ON SOUTH-AMERICAN APOCYNACEA, 
above very laxly branched, lower branches 14 in. long, again branching and bearing 
about 5 lax flowers on slender bracteolated pedicels 2 lines long; sepals acuminately 
lanceolate, margins pellucid, 14 line long, each with 2 lanceolate inner scales; corolla 
3$ lines long; tube 24 lines long; segments 1} line long, acutely oblong, membranaceous, 
with dextrorse convolution, all glabrous; stamens almost wholly included, inserted in a 
pilose ring; anthers acuminate, with 2 long slender basal prongs; disk of 5 oblong lobes, 
as long as the 2 glabrous ovaries ; 2 follicles, slender, acute, glabrous, 6-8 in. long. 
This species, in its inflorescence and floral structure, closely resembles the preceding 
from the same region, both being quite in accordance with Thyrsanthus; it is therefore 
neither a Forsteronia nor a Secondatia, more especially differing from the latter in its 
slender follicles, the seeds of which are not said to be comose. 
17. TuvnsawTHUs PYRIFORMIS, nob. In Antillis: v. s. in herb. Mus. Brit. Cuba (Sagra 141). 
A species near the two following. It has slender, pallid, striolate, dichotomous 
branches, with axils 1-13 in. apart; leaves obovate, subcuneate below the middle, 
rounded and mucronulate at the summit, very glabrous, thinly chartaceous, flat, palish 
green, above, opake, finely corrugulate, fine ascending nerves scarcely prominulent, 
with 2 minute glands at the base of the subimmersed midrib, pale yellow and opake 
beneath, the slender nerves scarcely visible, 2-21 in. long, 14-12 in. broad, on slender 
channelled petioles 4—5 lines long; panicle terminal, 23 in. long, on a peduncle bare at the 
base for 6 lines, bifid, and again dichotomously branched, each branch bifid and bearing 
2 fascicles of small, approximate flowers on pedicels 14 line long, supported by acute 
membranaceous bracteoles ¿ line long, all slightly puberulous; sepals obtusely oblong, 
with membranaceous margins, puberulous within along the nerve, 3 line long; corolla 
reddish, glabrous, 23 lines long; tube 13 line long; segments 1, line long, oblong, with 
dextrorse convolution; stamens mostly included ; anthers apiculate, with 2 long parallel 
basal prongs; disk of 5 free oblong lobes, as long as the 2 puberulous ovaries. 
18. TuvnsawTHUs PARVIFLORUS, nob.: Tabernemontana parviflora, Poir. Dict. Suppl. v. 276; A. DC. 
l.c. p. 374. In Amer. meridionali: non vidi. 
A species near 7. populifolius, with slender branchlets; leaves oval-lanceolate, obtuse 
at the base, acuminate, glabrous, dark green above, yellowish beneath, 2 in. long, 1 in. 
broad, petiolated ; panicles terminal, geminate, subcymose, bearing many subumbellate . 
small flowers, on short bracteolated pedicels. 
19. THYRSANTHUS FASCICULATUS, nob.: Tabernemontana fasciculata, Poir. Dict. vii, 531 ; A. DC. 4. c. 
p. 375. In Cayenne: aon vidi. 
A. species near the preceding. Its leaves are ovate-lanceolate, obtusely acuminate, 
2-3 in. long, 13 in. broad, petiolated; panicles cymose, axillary, divided, with many 
small flowers fasciculate at the ends of each ramification; tube of corolla 2-3 lines 
long, with linear segments. 
