to ON SOUTH-AMEEICAN APOCTNACE^. 



2-serial basal scales; tube of corolla 6 lines long; segments inequilateraUy oblong, sinis- 

 trorsely convoluted; stamens included ; disk cylindrical, crenulate on the margin, half 

 as long as the 2 ovate, pilose ovaries. 



5. Rhigospira SfRUGEi, nob. : Tahernc&montana Sprucei, Miill. /. c. p. 86, tab. 27. fig. 1. In Amazonas : 

 V. s. in herb, meo Panure, Rio Uahupes (Spruce 2594). 

 A Species well represented in the drawing cited. Its branches, somewhat slender and 

 verruculose, have axils |-1| in. apart ; its ovate, subflaccid leaves are 3^4^ in. long, 

 2-2| in. broad, on rather slender petioles 6-10 Unes long, shortly and deeply fossate at the 

 base, the hollow margined by a hooded edge, and connected across the node by a trans- 

 verse ridge ; panicle terminal, 4 in. long, on a bare peduncle 2 in. long, trichotomous at 

 its apex, with branches bare for 1 in. and bearing few flowers at their summits, on pedi- 

 cels 2 J lines long, supported by bracteoles 1 line long ; sepals ovate, obtuse, imbricate, 

 subscabridulous, with several inner imbricated scales at the base ; tube of corolla cylin- 

 drical, 5 lines long, pilose in the mouth ; segments oblong, subinequilateral, 5 lines long, 

 2J lines broad, subscabridulous within, erect and simply contorted sinistrorsely in aesti- 

 vation; stamens included, seated on a retrorsely pilose ring a little above the base of 

 the tube; anthers coherent, acuminate, with 2 acute basal prongs; disk cylindrical, 

 thickish, 5-sulcate, densely pilosulous, nearly concealing 2 free ovaries ; style short, with 

 an incrassated clavuncle. 



6. Rhigospira sinuosa, nob. : Tabernamontana Sprucei (in parte), Mull. I. c. p. 86. In Amazonas : v. s. 

 in herb, meo San Carlos, Rio Negro (Spruce 3693). 



A species differing from the preceding in its larger, more rigid leaves, with extremely 

 sinuous margins, always very rounded at the apex, and a more copious inflorescence. 

 The leaves are very acute at the base, sulcate along the midrib, the prominulent fine 

 divergent nerves terminating in the hollow of each sinus, ferruginously and granularly 

 opake beneath, with dark rubiginous prominulent nerves and immersed reticulated 

 veins, 4-6 in. long, 2^-3 in. broad, on stout channelled petioles |-1 in. long, shortly and 

 deeply fossate at the base, the fosset surrounded by an elevated hooded edge, partly 

 amplexicaul and connected across the node by a transverse ridge ; panicle terminal, 4 in. 

 long, upon an angular fuscous peduncle, spotted with small yellow lenticels, bare at 

 its base for 2| in., supporting several approximated, lenticellate, spreading ' branches 

 bracteolated at the base, bare for 3-6 lines, and bearing several congested flowers 

 on pedicels 2-3 lines long, supported by oval bracteoles 1 line long ; sepals obtusely 

 ovate, 11 line long, fusco-pruinose, ciliated on the margins, furnished within at the base 

 with subobsolete scales and ciliated hairs ; tube of corolla cylindrical, a Httle swollen at 

 the base, 3 lines long, with a pilose ring in the mouth ; segments fleshy, oblong, sub- 

 auricular at the base, erect, and simply convoluted sinistrorsely in gestivation, 5 lines 

 long ; stamens included, inserted above the base of the tube on 5 pilose lines ; anthers 

 acuminate, with 2 slender aristiform basal prongs ; disk cylindrical, thickish, 5-grooved» 

 pHose round the margin, and concealing 2 free ovaries ; style short, with an incrassated 

 clavuncle. 



