320 PROCEEDINGS OF THE AMERICAN ACADEMY, 
quadrangular, glabrous: leaves opposite, thin, ovate to ovate-lanceolate, 
acute, attenuate at the base, covered on both surfaces with a sparse 
more or less deciduous pubescence and resinous(?) punctation, ciliolate 
at least when young, sharply serrate ; petioles 2 mm. long; blade about 
2 cm. long, half as broad: floriferous branches leafy-bracted ; bracts 
somewhat obovate, cuneate at the base; peduncles 2-flowered ; pedicels 
slender, 4 mm. in length: calyx herbaceous, 6 mm. long, divided nearly 
to the base ; segments oblong-lanceolate, gradually and evenly narrowed 
almost from the base to the flat acute but not at all subulate tip: corolla 
scarlet, 2.4 cm. long, externally glabrous, internally pubescent near the 
base and bearded along a ventral line; lobes orbicular, spreading: cap- 
sule ovate, stramineous, 6 mm. long. — R. sarmentosa, Gray in Wats. 
Proc. Am. Acad. xxi. 434, not Jacq. — Collected in Jalisco in barrancas 
‘near Guadalajara by Dr. Edward Palmer, June, 1886, no. 126, and 
by C. G. Pringle, June, 1889, no. 2568. Types in herb. Gray. This 
species differs from any other known to the author in the shape of its 
calyx-lobes. 
++ ++ ++ Leaves serrate: 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. Pl. Carib. 25 (1762) nomen, Stirp. 
Select. Am. 178 (1763), t. 113. 
b. Leaves cordate. 
6. R. rrortpunpa, HBK. Nov. Gen. & Spec. ii. 359 Cy 
Doubtless represented by Palmer’s no. 252 from near Acapulco. 
7 R. SYRINGAEFOLIA, Cham. & Schlecht. Linnaea, vi. 376 (1831). 
= Stems and branches 6-many-angled. 
a. Stems glabrous or soon glabrate. 
8. R. verticirtata, HBK. Nov. Gen. & Spec. ii. 360 (1817). 
b. Stems tomentulose or pubescent. 
1. Leaves small. ° 
9. R. potyepra, Zuce. Abh. Akad. Muench. ii. 328 (1832-36)- 
i. retrorsa, Greene, Pittonia, i. 1 76, is hardly distinct. 
2. Leaves large. 
10. R. rerytrotia, HBK. Noy. Gen. & Spee. ii, 359 (1817). 
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