440 ROSACEüE. P OTEiNTILLA.
* * * Perennial: leavespalmately 3-7-foliolate.
t Flowering stems erect or ascending, not sarmentose.
12. P. gracilis (Dough): stem erect, tall, villous-pubescent; leaves
palmately 5-7-foliolate, the radical ones on long petioles; the cauline 1-2,
often subsessde; leaflets oblanceolate, deeply pinnatifid-serrate with triangular
lanceolate spreading teeth, canescently tomentose beneath ; stipules
large, ovate-lanceolate, acuminate, entire; cyme fastigiate, loose, the
primary branches elongated ; petals obcordate, much longer than the ovate-
lanceolate very acute or acumiuate segments of the calyx ; braeteolar
segments linear, shorter.—Hook*.' hot. mag. t. 2984, Sp fl. Bar.-Am. 1.
/?. fldbelliformis (Nutt. ! mss.) : leaves 5-9-foliolate; leaflets much
crowded, deeply pmnatifid; the lobes linear-lanceolate— P. flabelliformis,
Lehm.. stirp. pug. 2. p. 12, 8p in Hook. 1. c. t. 66, Sr suppl. Pot. p.
Id, l. 6. r
Clregon! common.: 0. Plains of the Saskatchawan, Richardson! Drum-
™°nd Plains of the Oregon (with «.), Nuttall /—The inflorescence of P.
flabelliformis is at length expanded, and the primary branches elongated, as
m ..V gracilis. The difference between the extreme forms of the two is
striking, but numerous intermediate states were found by Mr. Nuttall. The
stem is tall and slender, about 2 feet high, and mostly unbranched, except
at the summit. . 1
13' f ' f asilS lata (Nutt.! ms's.): “ canescently silky-tomentose ; stem
erect, leafy; leaves palmately 5-7-foliolate; leaflets cuneate-oblong, incisely
or pmnatifid-serrate ; stipules mostly entire ; flowers crowded, fastigiate;
segments of the calyx lanceolate, the outer ones much smaller-
petals obovate, a little longer than the calyx ; aehenia smooth.
/?. “ larger, more densely clothed with soft silky hairs.
“ Plains of the Rocky Mountains— Plant 7-8 inches high. Flowers
much smaller than in P. rigida.” Nuttall.. 14
14: (Nutt.) : hirsute with short appressed hairs, and minutelv
glandular, not canescent; stem erect, stout, leafy; leaves palmately 5- 7-
foliolate ; leaflets cuneiform-oblong; deeply pinnatifid-toothed ; the teeth
lanceolate-linear, approximate ; stipules short, mostly entire ; flowers
rather crowded; petals broadly obcordate, much longer than the ovatelanceolate
calyx-segments; aehenia smooth, slightly margined__Nutt. ! in
jour. acad. Philad. 7. p. 20. R. recta? Nutt. gen. 1. p. 310. P.chrvs-
antha, Lehm. in Hook.. 1. c. ? V J
On the Missouri, from Fort Mandan to the Rocky Mountains, Nuttall >
VDrummond ?)—Resembles P. recta, bnt apparently distinct from that
variable species. Dr. Short has sent us specimens of P. recta, which occurs
as a weed in his garden, but we do not learn that it is anywhere naturalized
m the United States. We find the aehenia perfectly smooth in all our
European specimens of that species, except when fully mature.
15. P. Salisburgensis (Haenke) : caudex prostrate, somewhat rooting-
stems decumbent at the base, pubescent; radical leaves palmately 5-folio-
late; leaflets obovate, glabrous, the margin and veins beneath pubescent
with spreading hairs, incisely serrate towards the apex with about 3 spreading
teeth on each side of the same length with the terminal one ; stipules all
ovate [petals obcordate, saffron-color, twice the length of the calyxl •
aehenia obsoletely rugose. Koch.—Heenke, in Jacq. coll. 2. p. 68 A- ic.
rar. 3. t. 490 ,- Koch. syn. p. 216. P. maculata, Pourret; E. Meyer, pi.
P o T E N T IL L A . ROSACEiE. 441
Labrad. p. 75. P. aurea, Fl. Dan. t. 114. P. crocea
Schleich, cat. (1807),- Lehm. ! Pot. p. 111.
Greenlahd, Hornemann ! (v. sp. in herb. Lehm.)
Haller, f . in
Xi g c r ib cw ^ ju / -D-L-C-l-I-l-ö Clo uuiymoose at me summit,
tomentose; leaves-palmately 5-foliolate; leaflets oblong-cuneiform, lacini-
ately pmnatifid or incised, entire towards the base, the margin revolute,
glabrous above, canescent beneath; flowers crowded; petals obovate, retuse,
longer than the obtusish calyx-segments.—Linn. ! spec. 1. p. 497 ; Enel,
hot. t. 289 ,- Pursh, fl. 1. p. 355 ; Torr.! fl. l .p . 497.
Barren fields and rocky places, Canada! and Northern States ! June-
feept. Stems numerous, 4-10 inches long, rather woody at the base,
r lowers small.
17. P. minima (Haller, f.) : stems ascending, pubescent, mostly 1-flowered;
leaves trifoliolate; leaflets obovate, very obtuse, glabrous, but hairy on the
mat gin and the veins of the lower surface, the hairs erect-spreading, incisely
serrate towards the apex, with about 4 teeth oh each side and a nearly equal
terminal one (petals obcordate, longer than the ca ly x ; exterior calyx-seg-
ments oval, obtuse, narrowed at the base. Lehm.) Koch— Haller, f . in
ischleich. pi. exsic. 1. no. 59 ,- Scringe, mus. Help. 1. p. 51, t. 8, Sc in DC.
' c; ■ K°ch, fl. Germ. Sp Help. p. 218. P. Braunlana, Hoppe, tausch.;
Lehm.. Pot. p. 179, not of Nestl-. ex Scringe.
0. flowering stems very short, but somewhat elongated in fruit.—P. Rob-
bmsiana, Oakes ! mss.
Alpine region of the White Mountains, New Hampshire, Nuttall! Mr.
Oakes! Mr. Tuckerman! (0.) June-July— Root fusiform. Leaves and
stems crowded, 1-3 inches high. Flowers small.—Our plant agrees well
with the character of P. minima (taken chiefly from Koch), and with European
specimens.
-18. P, nana (Lehm.) : stem erect, 1-flowered ; leaves trifoliolate; leaf-
lets roundish-obovate, obtusely toothed, hairy on both sides or rather canes-
cent beneath; petals obcordate, thrice the length of the calyx; exterior
calyx-segments roundish, very obtuse. Lehm.! Pot. p. 181, t. 17, Sc in
Hook. 1. c. ; DC. prodr. 2. p. 573.
Labrador, Kohlineister ! On the highest Rocky Mountains, Drummond !
Kotzebue’s Sound! &c.—Flowers large. Petioles elongated. This is perhaps
the P. emarginata, Pursh, which is the oldest name.
19. P. nivea (Linn.): villous or tomentose; stems’ascending, few-flowered;
leaves (mostly radical) palmately 3- (rarely 5-) foliolate ; leaflets oval or
obovate-cuneiform, pinnatifid-toothed or incised, silky-hirsute or nearly glabrous
above, canescent-tomentose beneath; stipules lanceolate, entire; petals
broadly obcordate, longer than the acute calyx-segments.— Vahl. fl. Dan. t.
1035 ,- Pursh! fl. 1. p. 353; “ Rottb. in act. Hafn. 10. p . 451, t. 7, ex R.
Br. ! in Parry's 1st voy. appx. p. 277 ; DC.! prodr. 2. p. 572; Richards.!
appx. Frankl. journ. ed. 2. p. 20 ; Hook. ! 1. c.
0. “ leaves sparsely villous and of the same color on both surfaces” [segments
of the calyx all very obtuse !] R. Br. 1. c. ; Hook. ! in Parry’s 2nd
voy. appx. p. 395. P. frigida ? Grev. in mem. Wem. soc. 4. p. 430, ex R. Br.
P. Grcenlandica, R. Br. in Ross’s voy. (ed. 2.) 2. p. 193. P. verna, Hook,
in Scoresb. Greenl. p. 431.
y. stems 1-2-floweied; flowers large; petals very broadly obcordate__
P. hirsuta, Vahl ! fl. Dan. t. 1390 ,- DC. 1. c. P. vahliana, Lehm. ! Pot.
p. 172, Sfin Hook. 1. c. P. Jamesoniana, Grev. 1. c. t. 20, fide Hook.
Greenland! and Labrador! Shores and Islands of the Arctic S e a ! to
Behring’s Straits! and along the Rocky Mountains to lat. 52°, and to
56