622 ROSACEAE 
R. argutus Link. shee erect or arching, 2 m. long or less, glabrous, 
d furrowed, the prickles stout, spreading, flattened: leaves of the 
turions pedately 5-foliolate, "ae: iduous; "le aflet-blades ovate, 3 g, 
acuminate, bly serrate dark-g above, softly and rather densely 
us 
t 7 nded or subcordate at the 
base: floral branches 1-2 dm. lo ong, densely villous and rarely slightly glandu- 
d den - is or some of the upper ones 1-foliolate; leaflet-blades ovate 
val: s few-flowered, short and represented by single flowers in the 
d iat exils- peduneles an nd T a eae ey and with curved 
prickles: petals orbicular to oval, about long, much exceeding the sepals: 
fruit slightly elongate, 10-12 mm. tae ea ee 
Thiekets and woods, various provinces, N. C. to La., Kans., and N. S.—A 
dni plant from Buncombe Co., N. C., with 5- -foliolate leaves on n the turions, 
and firm leaflets with em coarsely fog lied blades, has been described as A. 
Crux Ast he. Another from Tallahassee, Fla., with erect or ascending inflores- 
cence- branches, M ad of spreading, has been described as RE. tallahasseanus 
Bailey. R. ostryifolius Rydb. may be a hybrid between E. argutus x Ensleni. 
8. R. floridus Tratt. m erect, 2-5 m ,iigh, or the MAE decumbent, 
more or less angled, the prickles stout, flat, strongly curved: leaves of the 
turions 3- 5-foli olate: pm and petiolu olu les pilose nd sparingly prickly: 
xs blades cg de -lanceolate or ovate-lanceolate, 5-10 em. long, sparingly 
pubescent above, pale and more densely puberulent iur but in age nearly 
bu except t the ME sharply double-serrate: floral branches Bo leaves 
3-foliolate or the upper unifoliolate; leaflet-blades smaller more gla abrate, 
elliptic to rhombic-oval: corymbs rather few-flowered, re less lea afy; 
in ie and Dis deme pubescent, Ep p with ni ed glands, 
but not d petals n obovate, 1 ong: fruit thimble- bec e 
about 1 em. long, bla ck.—Pinelands and fields, qu Plain and adj. provinces, 
Fla. to Tex., Mo., and Va. ee. frondosa Bigel. with nearly terete siraighi 
prickles and broadly odas leaflets, appears not to range south of Va. 
. R. usce ea pois: o angled, = prickles recurved and 
strongly flattened, er ved-spreading: leaves of the turions 5-folio- 
late; lea T blades elliptic. deu. evenly serr ae thin, glabrous on bo 
sides: one Pii p Re and m idveins with very flat recurved prickles, gla- 
brous nea flowering e -2 dm. long, wi j 
ve e 
Ses 3. folielete, ped blades oval or elliptie, thin, glabrous, evenly serrate, 
shining above: corymbs somewhat leafy-bracted below, sparingly Pm 
and armed with recurved prickles: petals elliptic. -obovate, aan long: 
fruit rounded or slightly elongate, black—Swamps and wet ee oods, 
Coastal Plain and adj. provinces, Fla. to Miss., Ill., and Va.—A peer boe. 
from Uceta, Fla. with the blades of the leaflets of the turions very broad, 
that of the terminal one cordate or subeordate, has been described as R. 
ucetanus Bailey. 
10. R. canadensis L. Stems erect or arching, 4 long or less, glabrous, 
with rounded angles and furrows, unarmed or with feu straight weak prickles: 
leaves of the aay Bus ely 5- folioate, decidu ie Rana blades ovate to 
db mostly 6—15 em. long, abruptly long-acum , thin, RF rply serrate, 
glabrous or with Aes seated hairs above, spem Or £ pubescen on veins 
beneath, rounded or subcordate at ips base: floral bra pea ually 3- 
foliolate leaves lea fet- blades oval or nearly so, mostly "m em. ia ; raceme 
several-flow red, terminal, often le ae below: peduncles and pedicels pilose or 
villous: pet tals oval, 10— 15 m mm. long: fr uat ues a 1-1.5 em. long, black. 
is Millspaughii pum D ESS-BI )—Woods and cliffs, Blue 
inees, N. C. to Mich à per Ne wf.—R. Randti (Bailey) 
Byab,, pete en p nd stems, is not definitely known from our range. 
E —- —— 
Pe ur E 
