ON SOUTH-AMERICAN APOCYNACEEX. 67 
5. ANACAMPTA SUBMOLLIS, nob. : Tabernemontana submollis, Mart. et Müll. l. c. p. 70, tab. 22, In Ama- 
zonas: v. s. in hb. meo et alior. Rio Negro (Spruce 1666). 
A shrub 3-4 feet high, with dichotomous compressed branchlets, the axils 11-91 in. 
apart; leaves lanceolate-oblong, acute at both ends, opake pale green above, yellowish 
and very opake beneath, with about 16 pairs of paler prominent nerves, 5-7 in. long, 
13-24 in. broad, on stout petioles 3-5 lines long, deeply channelled, fossate at the base, 
their margins conjoined across the node by a transverse ridge; panicle lateral, 2 in. long, 
on a peduncle 1 in. long, with several very short branches bearing flowers on stoutish 
pedicels 2 lines long, bracteolated at the base; sepals ovate obtuse, 1 line long, with 
3 inner small lanceolate scales; corolla tubular; tube cylindrical, very little swollen in 
the middle, 6 lines long; segments oblong, inequilateral, deeply introflected, the ex- 
tremities descending into the tube; in estivation they are sinistrorsely convoluted into a 
small oval knob 2 lines long; stamens seated in the middle of the tube upon 5 longi- 
tudinal pilose lines; anthers acuminate, with 2 slender aristiform basal prongs; disk 
tubular, fleshy, 5-grooved, 5-crenulate, half the length of the 2 free, oblong, puberulous 
ovaries; style, clavuncle, and stigmata as in the generic character. 
6. ANACAMPTA HIRTULA, nob.: Tabernemontana hirtula, Mart.; Müll. l. c. p. 73, tab. 24. Ad Rio 
Orinoco (Spruce 3660) ; Santarem, Rio Amazonas (Spruce 2474): v. s. in hb. meo Rio Casiquiare 
(Spruce 3175), Santarem (Spruce 233, sub 7. pilifera). 
A lank species, well represented in the drawing cited. Branches fuscous, fistulose, 
sharply 4-angular, hirsutulous or subglabrous, lenticellated, with axils 1-2} in. apart; 
leaves oblong-elliptie, acute at both ends, subinequilateral, margins subrevolute, char- 
taceous, very glabrous, pale green above, yellowish opake beneath, with prominulent 
patently divaricated nerves terminating in the margin, immersed reticulated veins, 
5-10 in. long, 12-34 in. broad, on channelled petioles 3-5 lines long, fossated at the base, 
there hooded, leaving a deep oblong hollow, and conjoined across the node by a trans- 
verse ridge; panicles lateral and solitary at the nodes, 3 in. long, on a deflected, com- 
pressed peduncle 2 in. long, or shorter, bifid at the summit, each branch bearing several 
approximated flowers on pedicels 2 lines long, shortly bracteolated; sepals ovate, imbri- 
cated, 13 line long, each furnished at its base with very numerous acute scales; tube of 
corolla cylindrical, spirally twisted, 5 lines long; segments obliquely oblong, 4j lines 
long, deeply introplicated and convoluted sinistrorsely, forming in swstivation a knob 
2 lines long; stamens inserted below the middle of the tube; disk cylindrical, sulcate, 
crenate on the margin, pilose, shorter than the oblong glabrous ovaries. 
RHIGOSPIRA *. 
A group of plants differing from Anacampta in the rigid segments of the corolla— 
which are erect, and simply convoluted in a pyramidal form in «estivation: their leaves 
* From prydw (rigesco), oreipa (spira), because of the rigidly pyramidal form of the border of the corolla in 
estivation. 
K 2 
