50 RyDBERG: NOTES ON ROSACEAE 
Leaves decidedly pubescent beneath. 15. R. Lyont. 
Leaves glabrous or pubescent only on the veins 
beneath. 
Leaflets hs above; flowers usually corym- 
ickles as a rule stout and flattened 
at the ae e. 14. R. virginiana. 
Leaflets not shining above; flowers usually 
solitary, rarely a few together; prickles 
slender, terete. 
Leaflets not glandular-dentate. 
Plant low, usually less than 2 dm. high; 
leaflets less than 2 cm. long, dark 
green; prickles 3-5 mm. long, stout, 
often curved. 13. R. nanella. 
Plant usually more than 2 dm. high; 
leaflets usually more than 2 cm. 
long; prickles more than 5 mm. 
long, slender. 
Leaflets broadly oval. 16. R. obovata. 
Leaflets elliptic or narrowly oval. 17. R. carolina. 
Leaflets a Sa ag and rachis usu- 
ally glandular. 18. R. serrulata. 
Leaflets narrowly elliptic or lance-oblong, usually 9—- : 
I, at least on the new shoots. 19. R. nitida. 
Fe decidedly pyriform, or ellipsoid, long-tapering 
: 20. R. Bicknellii. 
10. Rosa PALUSTRIS Marsh. 
This has usually been known as Rosa carolina L. It is the 
R. carolina of the second edition of Linnaeus’s Species Plantarum, 
but not that of the first. It is evident that Linnaeus, when he 
prepared the manuscript for the first edition, did not have any 
specimens, but based his R. carolina wholly on the plate and 
description in Dillenius’s Hortus Elthalmensis, pl. 245, f. 316. 
This plate does not represent R. carolina as usually understood, 
but the species commonly known as R. humilis Marsh. In 
discussing R. carolina, Crépin states: ‘‘The latter description, 
i.e., that of Hortus Elthalmensis, and the figure can apply either 
to R. humilis Marsh. or to R. lucida Ehrh., but not to R. carolina 
as we know it today. Besides the branch which I have seen in 
Sherard’s herbarium with Dillenius’s name on, belongs to R. 
humilis Marsh (= R. parviflora Ehrh.). The result is that the 
first name for R. humilis Marsh. is R. carolina L. Sp. ed.1.” 
Crépin therefore arrived at the same conclusion as I. The oldest 
