PROCEEDD mi: AMERICAN ACADEMY. 



quadrangular, glabrous : leaves opposite, thin, ovate to ovate-lanceol 

 acute, atb auate al il covered on both surfaces with a sp 



more or less deciduous pubescence and resinous! P) punctation, ciliolate 

 ut lc-ast when young, Bharplj serrate; petioles 2 nun. long; blade about 

 2 era. long, half a-- broad: floriferous branches leafy-bracted ; bra 

 Bomewhat obovate, cuneate at the base; peduncles 2-flowered; pedl 

 Blender, 1 nun. in length : calyx herbaceous, <"> mm. long, divided nearly 

 (o the base; segments oblong-lanceolate, gradually and eveuly narrowed 

 almost from the base to the flat acute but not at all subulate tip: corolla 

 rlet, :.'. 1 cm. long, externally glabrous, internally pubescent near the 

 base and bearded along a ventral line; lobes orbicular, spreading: cap- 

 sule ovate, stramineous, 6 nun. long. — R. sarmentosa, Gray in Wi 

 Proc. Am. Acad. wi. 434, not Jacq. — Collected in Jalisco in barrancas 

 near Guadalajara by Dr. Edward Palmer, June, 1886, no. 126, and 

 by C. G. Priogle, June, 1889, no. 2568. Types in herb. Gray. '1 



differs from any other known tu the author in the shape of its 

 calyx-lol 



** -*-«■ +* I- urate: calyx-lobes broadly ovate, acuminate to subulate tips. 



= Stems and branches chiefly 4-angled, glabrous or glabrate. 



a. Leaves not cordate. 



5. R. sarmentosa, Jacq. Enum. PI. Carib. 25 (1762) nomen, Stirp. 



Select, ^.m. 17s (1763), t. 113. 



!,. Leaves cordate. 



6. P. FLORIBTTNDA, IIP.lv. Nov. Gen. & Spec. ii. 859 (1817). 

 Doubtless represented by Palmer's no. 252 from near Acapulco. 



7. R. syuingaefolia, Cham. & Schlecht. Linnaea, vi. 876 (1831). 



= = Sterna and branches B-many-angled. 

 (i. Stems glabrous or sunn glabrate. 



8. R. verticillata, HBK. Nov. Gen. & Spec. ii. 3C0 (1817). 



6. Stems tomentulose or pubescent 



1. Leaves small. 



9. R. poltedra, Zucc. Al.h. Akad. Moench. ii. 828 (1832-86). 

 ,'.'. /■ trorsa, Greene, Pittonia, i. 17<',, is hardly distinct. 



2. Leaves ].e 



10. R. TERNIFOLIA, HBK Nov. (i.n. & Spec. ii. 859 (1817). 



