ON SOUTH-AMERICAN APOCYNACEEX. 73 
numerosis in seriebus 2-4 munitus. Corolle tubus cylindricus, paullo sub medio constrictus, 
calyce sesqui longior; segmenta 5, breviora, rotundato-dolabriformia, «wstivatione simpliciter sinis- 
trorsum convoluta. Stamina inclusa ; filamenta brevissima, ad constrictionem tubi inserta; anthere 
graciles, subliberz, imo longiuscule biaristatze, apice cuspidate, conniventes. Stylus tenuis, stamina 
attingens; clavuncula incrassata, oblonga, profunde 5-sulcata, imo membranaceo-appendiculata ; 
stigmata 2, brevissime linearia. Discus cylindricus, adnatus, profunde 15-suleatus, margine obtuse 
15-dentatus. Ovaria 2, acute oblonga, sulcata, disco 2plo longiora. Folliculi 2, oblongo-ovati, 
divaricati, apice recurvatim rostrati, rugulosi. 
Frutices in America meridionali vigentes, ramulis crassis, ad nodos compressis; folia majuscula, 
oblonga, brevissime et crasse petiolata, petiolis oppositis, imo fossatis, marginibus linea transversali 
conjunctis ; panicule ad nodos unilaterales; pedunculus apice ramosus, ramis 2-floris; flores 
pedicellati. 
1. CODONEMMA CALYCINUM, nob.: Tabernemontana calycina, Spruce, MS. (non Wall): Taberne- 
montana Benthamiana (bis), Müll. l. c. p. 70. In Amazonas: v. s. in hb. meo et Mus. Brit, San 
Gabriel, Rio Negro (Spruce 2110). 
A plant bearing much the appearance of Anacampta angulata, especially in its deeply 
fossate petioles. The branches are trigonous, dilated at the axils, which are 24-34 in. 
apart; the leaves are very oblong, subcuneate and insequilateral at their base, con- 
stricted at the apex into a narrow acumen 1 in, in length; they are chartaceous, bright 
green above, sulcate at the 24 pairs of divergent immersed nerves, which terminate in 
the reflected margins, paler and yellowish opake below, midrib and nerves prominent, 
with transversely reticulated veins, 15 in. long, 3-31 in. broad, on stout channelled 
petioles 3 lines long, deeply fossate at the base and conjoined across the nodes by a 
transverse ridge; panicle lateral, fixed 4 lines above each node, on a peduncle barely 
1 in. long, bearing 8 or 10 flowers on branchlets 1-2 lines apart, each supporting 
2 flowers and 2 bracteoles at its apex, on pedicels 3 lines long; calyx tubular at its base, 
9 lines long, divided above into 5 obtuse lobes 3 lines long, the tubular portion being 
fleshy, and furnished inside with numerous lanceolate scales in several series; the tube 
of the corolla in bud is as long as the calyx, the segments somewhat shorter, very gib- 
bously ovate, sinistrorsely convolute in «estivation; stamens and disk as in the generic 
character. 
A drawing of this species, and the analysis of its flower, are shown in Plate VIII. B. 
2. CODONEMMA MACROCALYX, nob.: Tabernemontana (Odontadenia) macrocalyz, Müll. in Linn. xxx. 403. 
In Guiana ad Acarouari (Sagot 394) : non vidi. 
A species near the preceding. It is a tall shrub, with subscandent branchlets, very 
compressed at the nodes; leaves ovate, sometimes acuminate, suddenly constricted at 
the base upon the petiole, subchartaceous, patent, pale green on both sides, with about 
12 pairs of divergent nerves, 63-8 in. long, 34-44 in. broad, on thick, short, channelled 
petioles 14-2 lines long, fossate at the base, their margins conjoined across the node by 
a transverse ridge; panicle axillary or terminal, bearing several reddish-yellow odo- 
riferous flowers on a peduncle 9-12 lines long; calyx 7i lines long, tubular at its 
base, and divided halfway down into 5 oblong obtuse lobes, bearing within, at the base, 
several lanceolate scales; tube of corolla cylindrical, slender, twice the length of the 
calyx; stamens inserted in the middle of the tube; disk cylindrical, adnate, deeply pluri- 
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