ON SOUTH-AMERICAN APOCYNACEZ. 247 
immersed nerves, arcuately conjoined, paler, opake, and ferruginous beneath, puberulous, 
3 in. long including the linear acumen (4 lines long, 1 line broad), 14 in. broad, on 
channelled petioles 3 lines long; panicles axillary and terminal, 3 in. long, laxly 
branched, branches subdivergent, 4-6 lines apart, 12 lines long, bare at the base, again 
divided and bearing numerous very small flowers on bracteolate pedicels } line long, 
all shortly puberulous; sepals acute, $ line long; corolla 2 lines long; tube extremely 
Short; segments oblong, three times as long as the tube; stamens exserted. 
12. FORSTERONIA THYRSOIDEA, Müll. Z. c. p. 105: Echites thyrsoidea, Vell. Fl. Flum. p. 111, Icon. iii. 
tab. 37. In Brasilia, prov. Rio Janeiro, ad Santa Cruz: non vidi. 
A scandent species, with stoutish hirsute branches 4 lines thick, with axils 44 in. 
apart, whence issue more slender branchlets divaricating nearly at a right angle, 9 in. 
long, hirtous, lenticellate, the axils 2 in. apart; the leaves on the branchlets (sometimes 
not quite opposite) are elliptic, rounded or roundish at the base, constricted near the 
apex into a subobtuse acumen, with about 12 pairs of very fine diverging nerves and 
many transverse reticulated veins, hirsutulous beneath, 3-3} in. long, 1-13 in. broad, ` 
on slender pubescent petioles 14-2 lines long; inflorescence terminal, on a peduncle 
3 in. long, supporting a pyramidal floral mass 2 in. long, 10 lines broad at the lower 
part, gradually pointed upwards, consisting of a number of densely approximate 
branchlets crowded with many very small yellowish flowers, each mostly concealed by 
its own small lanceolate bract ; flowers scarcely more than 2 lines long; pedicels very 
short ; sepals acutely lanceolate ; tube of corolla extremely short; its segments 2 lines 
long, subacute; stamens quite exserted: subsequently the floral peduncle becomes 
elongated and thickened, producing 3 long pedicels 6 lines apart, each supporting 2 
elongated pendent follicles 9} in. long, having about 6 narrow strangulations, the 
intervals being fusiformly oblong, seminigerous, 2 lines broad, dehiscing in the usual 
manner; seeds conically oblong, subpilose, 5 lines long, 1} line broad, with a spreading 
coma 8 lines long. 
A species near F. montana. 
13. FORSTERONIA DIVARICATA, nob.: ramis validiusculis, pallide brunneis, verruculoso - lenticellatis, 
remote divaricatim opposite ramosis, ramis tenuioribus incurvatis, iterum breviter ramulósis, 
ramulis tertiariis brevibus, foliatis et floriferis : foliis ellipticis, in paribus tribus, imo subrotundatis, 
apice breviter acutis, chartaceis, supra fusco-viridibus, opacis, scabridulis, ad nervos sulcatis, nervis 
utrinque 6, divergenti-adscendentibus, immersis, subtus pallidioribus, opacis, costa nervisque fulvis 
prominentibus, patentim hirtulis, breviter petiolatis: paniculis in ramis tertiariis terminalibus, 
a basi trichotomis, ramis adscendenti-divaricatis, curvatis, imo nudis, superne ramulosis et crebriter 
plurifloris ; floribus congestis, hirsutulis, pedicellatis ; sepalis parvis, acutis ; corolla hispidula, tubo 
brevissimo. In Brasilia, prov. Rio de Janeiro: v. s. in herb. Mus. Brit. ex l. c. (Bowie and Cunning- 
ham, n. 72). 
This plant has many of the characters of the Echites thyrsoidea of Velloz, the pre- 
ceding species, but is more glabrous and its inflorescence more diffuse, and has smaller 
leaves. The main branch is 1 line thick, with axils 24 in. apart ; the primary branchlets 
issue from these axils nearly at a right angle, curving upwards, being 3 in. long, all 
