ROSACEA.
27. P. Durandii: hirsute-pubescent; stems procumbent, sarmentose;
leaves 3-foliolate; leaflets roundish, incisely crenate-toothed, hirsute with
appressed hairs, especially beneath; stipules ovate* entire; pedicels axillary,
solitary, elongated, petals obovate, rather longer than ovate acute or acuminate
calyx-segments; bracteolar segments larger and foliaceous, 2-4-
toothed or incised ; achenia.............
Georgia, Mr. Durand!—Leaflets about half an inch in length and
breadth, obtuse and entire at tire base, incisely crenate with 11-13 approximate
equal teeth, with scattered short appressed hairs, particularly on the
veins. Flowers large. Ovaries glabrous : style filiform, elongated. Fruit
not seen.—The bracteoles, which are large and toothed like the leaflets, are
perhaps in an abnormal state in our single specimen ; but the plant is quite
different from any species with'which we are acquainted.
28. P . nemoralis (Nestl.) : petals, calyx-segments, and bracteoles usually
4 ; stems filiform, procumbent; leaves palmately 3-foliolate, the lowest
mostly 5-foliolate ; the cauline ones petioled; leaflets obovate-cuneiform,
incisely toothed towards the apex; stipules entire or toothed; flowers solitary
on long axillary pedicels ; petals obcordate, longer than the calyx ; achenia
striate-rugose.—Nestl. Pot. p. 65; Lehm. ! Pot. p. 147, t. 13. P. Tor-
mentilla, var. nemoralis, Scringe! in DC. prodr. 2. p. 574. Tormentilla
reptans, Lin n .; Engl. hot. t. 864.
Labrador ! (v. sp. in herb. Hodk.)
29. P . opaca (Linn.) : stems decumbent, filiform ; lower leaves palmately
5-7-foliolate ; leaflets narrowly cuneiform ; very deeply serrate, pilose on
both sides ; petals obcordate, equalling the calyx. Lehm.—Jacq. ic. rar. t.
91 ; Pursh, jl. 1. p. 355; Lehm. Pot. p. 105.
Lahrador ex Pursh. May-June.—Flowers small.
§ 2. Style inserted below the middle of the ovary: seed ascending, amphi-
tropous or nearly orthotropous.
* Style inserted scarcely below the middle of the ovary, filiform ; seed amphitro-
pous : carpels glabrous, very villous at the insertion (receptacle very villous :
stems creeping and proliferous: pedicels solitary, very long, 1-flowered).—
Aiiserina. 30 *
30. P . Anserina (Linn.) : creeping; ascending stem none ; stolons slender,
rooting and proliferous; leaves pinnate ; leaflets 9-19, with several
minute pairs interposed, oblong, sharply pinnatifid-serrate, nearly giabrous
above, silvery-canescent beneath"; stipules multifid ; pedicels scape-like,
solitary, as long as the leaves.—Linn.! spec. 1. p. 495 Michx. ! L c .;
Lehm. L Pot. p. 71; DC. ! 1. c .; Hoolc. ! fl. Bor.-Am. 1. p. 189.
/?. grandis : leaves very large (12-20 inches long), 21-31-foliolate.
y. Grosnlandica (Hook.) : very small and slender, nearly glabrous ; leaflets
oval or obovate, 5-7, silvery beneath, often reddish above.—Hoolc.! in
Parry's 3d voy. appx. p. 125.
<5. E gedii: very small; -leaflets glabrous and greenish on both sides;
stipules entire; pedicels longer than the leaves.—P. Egedii, Wbrmslc. Jl.
Dan. 9. t. 1578 ; Lehm. ! 1. c.
Banks of streams, &c., Pennsylvania! and New England States! to
Arctic America! west to Oregon ! and California! 0. Oregon, Dr. Scouler!
y. Greenland, and Whale-Fish Islands ! Sandy borders of brackish ponds,
Massachusetts, Dr. Pickering! Mr. Oakes! 1. Greenland! June-Sept.—
Flowers large. Widely dispersed throughout the colder portion of the whole
Northern hemisphere, and presenting, in consequence, many varieties. The
variety from Oregon is extremely large in all its parts; the pedicels are
often a foot long; and the root is said to be eaten by the natives.—Silver-
weed.
* * Style filiform, inserted below the middle of the ovary: seed amphitropous
or almost orthotropous : carpels and receptacle clothed with very long villous
hairs.—Comocarpa.
31. P . fruticosa (Linn.): shrubby, much branched; leaves pinnately
5-7-foliolate, on short petioles; leaflets crowded, oblong-lanceolate, entire,
silky especially beneath; stipules scarious; petals (yellow) nearly orbicular,
longer than the calyx.—Linn.! spec. 1. p. 495 ; Willd. ! spec. 2. p. 1094 ;
Michx. ! Jl. 1. p. 304 ; Nestl. Pot. t. 1 ; Engl. bot. t. 88 ; Pursh! jl. 1. p.
355 ; Lehm.! 1. c. p , 31; DC. ! prodr. 2. p. 579 ; Hook.! Jl. Bar.-Am. 1.
р. 186. P. floribunda, Pursh! 1. c.
Bog meadows, and along streams, Arctic America ! Newfoundland ! and
Kotzebue’s Sound! to Canada ! and the Northern States! Also along the
Rocky Mountains to lat. 42°, Dr. James! June-Sept.—Shrub 2—3 feet
high, with large flowers terminating the numerous branchlets. Leaves very
variable in size. Disk, receptacle, and achenia extremely villous with very
long stiff hairs.
32. P .- tridentata (Ait.): stems woody and creeping at the base, branched ;
flowering stems ascending; leaves palmately trifoliolate; leaflets oblong-
cuneiform, 3-toothed at the apex, nearly glabrous and somewhat shining
above, pale and minutely pubescent beneath; stipules lanceolate; petals
(white) obovate-oblong, nearly twice the length of the calyx.—Ait. ! Kew.
(ed. 1.) 2. p. 216, t. 9 ; Michx. & 1. 304 ; Engl. bot. t. 2389 ; Lehm. ! L
с . ; Torr.! jl. 1. p. 495; DC. ! 1. c .; Hook.! jl. Bor-.-Am. l .p . 195. P.
retusa, Betz ; Fl. Dan. t. 799, &p 1875.
Greenland! Labrador! Newfoundland! and Canada! to the mountains of
the New England States ! New York! and the higher peaks in Virginia and
North Carolina, and from Lake Superior ! to lat. 64°. June-July.__Stems
4-10 inches high. Flowers small, few. Achenia roundish-ovoid, at length
rather sparsely villous.
* * * Style fusiform, attenuate' at the base, fleshy or apparently glandular,
large, rather persistent: seed nearly orthotropous: carpels glabrous.__Clos-
TEROSTYLES.
P. rupestris belongs to this section, but the style
arguta. is less thickened than in P.
33. P . arguta (Pursh): stem erect, very pubescent, villous and viscid at
the summit, as also the peduncles and calyx ; radical leaves pinnately 7-9-
foliolate, on long petioles; the cauline ones few, 3-7-foliolate; leaflets roundish,
ovate, or somewhat rhomboid, oblique at the base, incised or doubly serrate,
pubescent especially beneath ; stipules toothed or entire; flowers in a
more Or less crowded terminal cyme ; segments of the calyx ovate, acute,
shorter than the roundish-obovate yellowish-white petals; disk glandular,
thickened, somewhat 5-lobed.—Pursh! Jl. 2. p. 636 ; Richards.! appx.
Frankl.joum. ed. 2.p. 20; Lindl.! bot.reg. t. 137; Hook. jl. Bor.-Am. \.
p. 186, t. 63. P. confertiflora, Torr.! jl. l .p . 449 ; Lehm.! stirp. pug. 3.
P- 24. P. Pennsylvanica 0. arguta, Torr.! in ann. lyc. NewYor/c, 2 .p.
197, not of DC. Geum agrimonioides, Pursh ! Jl. 1. p. 351. Boottia syl-
vestris, Bigel. ! Jl. Bost. ed. 2. p. 351.