ON SOUTH-AMERICAN APOCYNACEE, 53 
tube on a narrow pilose ring; filaments short pilose; anthers acuminate, biaristate at 
the base, dorsally pilose ; disk cylindrical, 5-sulcate, 5-crenulate, shorter than the two 
glabrous ovate ovaries; style, clavuncle, and stigmata as in the generic character. 
10. BoNAFOUSIA PoLYNEURA, nob.: Tabernemontana rupicola, var. Sprucei, Müll. l. c. p. 75. In Ama- 
zonas: v. s. in hb. meo et alior. Barra do Rio Negro (Spruce 1758, sub ** T. rupicole affinis ”). 
A species distinguished by its more densely foliaceous habit and its polyneurous 
leaves. Its dichotomous branchlets are rugulose, with axils 11-2 in. apart; the oblong 
leaves, oval and suddenly acute at the base, not insequilateral, constricted into an acute 
acumen, are dark rubescent green above, with subcrenulated numerous subpatent nerves 
1-2 lines apart, opake and yellowish beneath, with fine nerves, scarcely prominulent, 
3-5 in. long, 1j-2 in. broad, on channelled petioles 13 line long, transversely con- 
joined across the axils; raceme lateral, 1 in. long, on an angular peduncle 3 lines 
long, supporting about 3 flowers on pedicels 2 lines long; roundish, membranaceous 
sepals, acute, ciliated on the margins, 4 line long, with an inner trifid scale; tube of 
corolla cylindrical, fleshy, swollen below the narrow mouth, 5 lines long; segments 
obliquely oblong, about 8 lines long, 2 lines broad, introflected and convoluted sinis- 
trorsely in sestivation, the extremities descending into the tube; stamens included in the 
middle of the tube, seated on a pilose ring; ovaries ovate, embraced at the base by a 
short annular adnate disk; style, clavuncle, and stigmata as in the generic character. 
11. Bonarousia RARIFLORA, nob.: Tabernemontana rupicola, var. oblongifolia, Müll. l. c. p. 74. In 
Amazonas: v. s. in hb. meo et alior. Barra do Rio Negro (Spruce 1005 ?). 
A species differing from 7. rupicola in its petiolated, very lanceolate leaves, almost 
nerveless, and a different inflorescence, a more slender habit, with virgated branchlets 
and distant internodes; the dichotomous slender branchlets are yellowish, striolated, 
with axils 11-21 in. apart; the leaves, subcrenulate, cuneately insequilateral, with a 
long acumen, yellowish beneath, are 445 in. long, 1-1} in. broad, on very thick petioles 
2 line long, conjoined across the axils; the lateral raceme, on a peduncle 8 lines long, 
has a stipuliform bract at its base, and supports 3 alternate flowers, on pedicels 4-5 lines 
long; sepals acute, barely 1 line long; tube of corolla 44 lines long, narrowed in the 
mouth; segments dolabriform, 6 lines long, 3 lines broad, simply convoluted sinistrorsely 
in estivation; stamens seated on a pilose ring in the constriction of the tube; the rest 
as in the preceding species. 
'TABERNJEMONTANA. 
This genus was first proposed in 1703 by Plumier in his * Genera,' p. 18, with a short 
character, illustrated by a drawing of its flower and fruit. He figured the plant in 1757, 
with a more copious description of his type, under the specific name of citrifolia un- 
dulata (Am. ii. 246, tab. 248 B), giving as its synonyms T. citrifolia lanceolata, Hort. 
Cliff., and Z. frutescens, P. Browne.  Linn:eus, in his Sp. Pl. (1753) describes the genus 
